Parts & Accessories

No.9 Tubeless valves for use with Whisky Tubeless rims and most other systems. These alloy stems feature removable Presta cores and are designed to fit up to 8mm valve holes. - Available in a number of lengths and colors to perfectly fit your rims and your sense of style. - Includes two valves

- Shim adds support to Presta stem used in a Schrader rim

Vittoria's Mastik'One is a professional-grade tubular cement that has been trusted by the pros for decades. It provides excellent hold on both aluminum and carbon rims, and gives you the piece of mind that comes with knowing you're riding on the best. - Choose from 250-gram tin or 30-gram 12-pack - 30 grams is enough for one to two tires depending on surface area

Stan’s unveiled the Dual Action Repair for Tubeless (DART) Tool in 2019, ushering in the first repair plug designed specifically for tubeless bicycle tires, rather than a scaled-down version of what was available in the automotive and motorcycle world. Subsequent refinements made way for the tool’s rerelease as the Original DART Tool in 2025, introducing a stainless steel insertion rod accompanied by an improved DART developed through the first tool’s lifespan. By using a flexible, laser-cut material, the DART conforms to nonuniform puncture shapes caused by the jagged and sharp edges of debris and obstacles found on trails, roads, and paths. Treated with a reactive solution, the DART bonds with liquid sealant on the inside of a tubeless tire to form both a chemical and mechanical seal to permanently bond a puncture too large for tubeless sealant to repair on its own. Complete with two DARTs, the tool weighs only 15-grams and fits comfortably in any small pack pocket. For added convenience, the base of the molded plastic tool body features a Presta valve core remover to aid in-the-field sealant topoffs with either a 60ml or 120ml bottle of Stan’s Original Tubeless Sealant. - Includes two DARTs, refills sold separately - Repairs punctures and slices too large for sealant alone to seal - Woven, laser-cut material easily conforms to nonuniform puncture shapes - Base of tool features molded Presta core tool for sealant top-offs - Clear caps keep DARTs clean and unthread for quick use

Stan’s NoTubes Sealant is a thin, low-viscosity liquid that coats the tire interior and seals punctures quickly. Two ounces of Stan's in a tubeless tire can repair punctures up to 1/4" to keep you rolling. Stan's Tire Sealant is formulated to stay liquid in tires for up to seven months. Arid conditions require more frequent monitoring of sealant levels, but anti-freezing agents in our special formula allow Stan's Tire Sealant to be used in temperatures as cold as -30° F. One quart can convert up to 16 tires. - Suitable for use in tubeless tires and standard tubes - Designed to seal punctures up to 1/4" - Stable down to -30 degrees Fahrenheit - Non-hazardous, non-corrosive, non-toxic - Contains natural latex

The Problem Solvers Presta Valve Extenders add 30 to 70mm of length to your tube or tire valve so that it protrudes far enough out of deep-section rims so that you can attach your pump. These lightweight, durable aluminum extenders are for use with Presta valves that have removable cores. The proper tool for removing the cores and installing the extenders is included.

Endurance formula lasts twice as long as standard Orange Seal. - Premium Latex coats the whole casing, from tire bead to tread cap - Seals punctures up to 1/8-inch, and slices up to 1/2-inch with the use of Nanites - Developed to add as little weight to a tire as possible - Made of eco-friendly biodegradable ingredients

- Endurance latex tire sealant lasts 2-3 times longer than standard Orange Seal - Contains multiple shapes and sizes of solid particles called nanites which quickly seal holes up to 1/4 - Performs in varying temperatures - Recommended by numerous tire

Your tubeless wheels will benefit from the use of Orange Seal Tubeless Tire Sealant. It is proven to seal large punctures up to 1/4-inch and perform under varying temperatures and altitudes. Orange Seal Tubeless Tire Sealant is compatible with most bike tire systems and is eco-friendly.

- A premium proprietary latex tire sealant formula featuring lightweight biodegradable ingredients; 119.6 grams for 4 ounces - Contains multiple shapes and sizes of solid particles called nanites which quickly seal holes up to 1/4 - Performs in varying

Say goodbye to the hassle of traditional tubeless valves that clog up and require valve cores to be removed to fill sealant with sufficient air flow during set up. Big Bore Valves are engineered with precision and designed to deliver maximum air inflation simply and efficiently. Crafted from 7075 aircraft grade CNC machined aluminum construction with a stainless-steel ball valve, this fully serviceable valve is built to withstand the toughest rides, whatever the conditions. This patent-pending design sets a new standard in high air flow tubeless tire systems with a revolutionary ‘Straight through’ internal design for maximum airflow fire power, allowing higher air volume per pump, reduced sealant clogging and easier tubeless setup. - Big Bore Lite valves feature a standard Presta valve head design, while offering up to 230% higher air flow than traditional Presta valves - Coreless, ball valve construction and integrated lever allows you to quickly open and close the valve for effortless airflow control, and even fine tune your pressure along the ride - Stainless steel ball valve with seals and O-rings - Serviceable design with spanner flats on the head, lever and body - 4-way tire insert air flow base is compatible with most tubeless inserts - 4mm machined hex key slot for easy installation and removal - Supplied with various rubber bases to optimize fit and seal with multiple rim types - Larger Stem Length: 45mm - Overall Length with cap: 75mm - Suggest Rim Depth: 25 - 30mm

- Puncture protection for inner tubes - Suitable for commuter, folding, urban, touring, MTB and e-bikes - Seal multiple punctures up to 4mm - Lasts the life of the inner tube - Non-hazardous, water soluble, and contains corrosion inhibitors

Laugh in the face of punctures with Muc-Off's super lightweight inner tube sealant! The No Puncture Hassle Inner Tube Sealant is easy-to-install, and the cutting edge molecules seal holes in tubes of up to 4mm, ensuring that your ride is uninterrupted. - Proprietary water-based non-hazardous formula developed specifically for use with inner tubes - Compatible with a wide range of tube sizes and bikes - suitable for commuter, folding, urban, touring, MTB and e-bikes - Works on multiple punctures - Lasts the life of the inner tube/tire - Contains cutting-edge molecules to help seal holes quickly and effectively; seals holes in tubes up to 4mm

Looking for a super lightweight but badass tubeless sealant? Boom, you've just found it my friend! No Puncture Hassle performs under the most brutal race conditions. The cutting-edge microfiber molecules fill the bigger holes and tears, whilst the advanced latex forms a strong seal instantly. The formula also contains a unique UV detection system that highlights any punctures you haven’t seen during your ride. Developed with the world's top downhillers and pro peloton teams, to give you the finest tire sealant available. It's non-corrosive and easily washes off with water. Compatible with tubeless ready and full UST wheels/tires, No Puncture Hassle works from 15psi-120psi and temperatures from -20°C to +50°C. Our pouch is designed to fit your Presta valve perfectly and is ideal to add to your toolkit or ride pack for emergency top ups on the go! - For Downhill, Enduro and Road tires - Seals tears and holes up to 6mm - Contains UV puncture detection - Won't dry out or ball - Works from 15psi-120psi and temperatures from -20°C to +50°C - Biodegradable

Compatible with all tubeless road, MTB and gravel tires. Refill packs with 10 repair plugs (5x thin and 5x thick).

Tubeless repair kit from Muc-Off.

A ride-saving tool that’s hidden in your bar-ends. Don’t let pesky punctures ruin all the fun! When a puncture strikes just too big and gnarly to seal, the Muc-Off Stealth Tubeless Puncture Plug ultimate backup tool that’s cleverly stored inside your bar ends! The expanding silica plugs included cover most MTB, road, and gravel handlebar sizes, and the premium CNC Machined Aluminium bar ends are available in 10 anodized colors to match your ride. Each lightweight and durable set contains everything you need to get back riding when you’re stuck battling a hole that’s just not sealing: a stainless steel 2-in-1 puncture plug reamer tool, a variety of different sized tire worms, and a trimming knife. HIGHLIGHTS: - Screws into bars using just a 4mm Allen key - Plugs and repairs multiple holes that won’t seal with just sealant - CNC Machined from 6061 Aluminum. - Expanding silica plug fits most MTB, Gravel & Road Handlebars with a larger than 17mm inside diameter. - Supplied with 17mm, 19mm, and 21mm silica plugs to fit different handlebar diameters - Compatible with most open-end grips and drops bars with an 84mm straight section at the bar end. - Dimensions 89 x 27 x 27mm - Weight: 33g per side (excluding tire worms) WHAT'S INCLUDED: - Supplied as a pair - 1 x Stainless steel 2-in-1 puncture plug/reamer tool - 1 x knife trimming tool - Supplied with 5 x thin tyre worms, 5 x medium tyre worms & 5 x thick tire worms

The Muc-Off Tubeless Rim tape is made from their proprietary performance material with a pressure-sensitive adhesive to provide just the right amount stretch whilst maintaining durability and strength needed to create a lasting airtight seal. Semi-transparent material makes locating the valve hole easy.

- The same tubeless valves, now with a Tire Insert air flow system - 6 slots machined into the base of the valve stem allow air to flow freely around tubeless tire inserts - Upgraded to aircraft grade 7075 aluminum valve stem and cap - 4mm machined Allen Key slot for easy installation/removal - Valve core removal tool integrated into valve cap - Includes multiple rubber bases to optimize fit with multiple rim types

The Lizard Skins Utility Strap is an easy way to stow essential tools and a spare tube. The minimally designed Utility Strap is a lightweight on-bike storage solution for any rider. This versatile system is made to securely attach under seats and other locations on bike frames. The Utility Strap has a wide strap and durable metal buckle. - On-bike storage solution - Inner sleeve to compress the tube - Multiple spots for tools: CO2, Tire Lever, Multi-tool, etc. - Wide strap and durable metal buckle - Silicone and rubber grip for stability - Compact and lightweight - Attach under the seat or other locations on the bike frame - Weight 4oz

Compact tubeless tire repair kit with machined aluminum storage tube that doubles as a handle. Combined tire reamer and insertion tool. Includes five tire plugs. - Weight: 47g

CushCore tubeless air valves are specially designed to work with a CushCore tire insert. The air passageway is T-shaped, rather than a simple through-hole, which prevents the insert from obstructing air flow through the valve. - Made from CNC machined from 6061 T-6 aluminum, anodized black - Tapered rubber collar permanently bonded at the sealing interface - The valve core can be removed to add tire sealant - Valve locknut with o-ring seal and valve cap are included - Sold as a set

CushCore is an engineered foam insert to be mounted inside a tire, designed to absorb impacts, reduce vibration, and increase lateral stability. These characteristics translate to a more controlled, comfortable, and faster ride. - The system is designed to be used with tubeless-ready or tubeless converted rims and tires and is compatible with tubeless tire sealants - The insert divides the inner volume of the tire in half, maintaining air underneath the tread and the foam insert next to the rim - Fits tire widths 33mm to 46mm and inner rim widths 19mm to 26mm Includes - 1 CushCore Insert - 1 CushCore Tubeless Air Valve - Installation Instructions

CushCore is an engineered foam insert to be mounted inside a tire, designed to absorb impacts, reduce vibration, and increase lateral stability. These characteristics translate to a more controlled, comfortable, and faster ride. - The system is designed to be used with tubeless-ready or tubeless converted rims and tires and is compatible with tubeless tire sealants - The insert divides the inner volume of the tire in half, maintaining air underneath the tread and the foam insert next to the rim - Fits tire widths 2.1 – 2.6" and rims with internal width 22 – 35mm Includes - 1 CushCore Insert - 1 CushCore Tubeless Air Valve - Installation Instructions

- 44mm alloy valves with quality nitrile rubber seal. - Valve core tool included.

CushCore is an engineered foam insert to be mounted inside a tire, designed to absorb impacts, reduce vibration, and increase lateral stability. These characteristics translate to a more controlled, comfortable, and faster ride. - The system is designed to be used with tubeless-ready or tubeless converted rims and tires and is compatible with tubeless tire sealants - The insert divides the inner volume of the tire in half, maintaining air underneath the tread and the foam insert next to the rim - Fits tire widths 1.8" to 2.4" and inner rim widths 22mm to 32mm Includes - 1 CushCore Insert - 1 CushCore Tubeless Air Valve - Installation Instructions

- To be used exclusively with Bontrager 29""/700c Tubeless Ready (TLR) wheels - TLR Rim Strips are the light and easy solution to Bontrager Tubeless conversion - Rim Strip replacement is recommended if removed from the wheel

Use Bontrager's Rhythm 27.5-inch Tubeless Rim Strip to convert your Rhythm wheel (sold separately) to tubeless. Riding tubeless lets you lower your tire's air pressure for more traction and a smoother ride with considerably less flats.

Bontrager's latest TLR sealant seals faster, lasts longer, and provides better air retention so you have a better tubeless experience with easier setup. The ammonia-free formula won't corrode rims or degrade tire rubber, and it provides permanent repair for punctures up to 6.5mm. Product details - Improved flat protection seals punctures faster - Increased air retention holds air longer with 3x less air loss than the original - Compatible with all TLR tires for use on road, gravel, and mountain bikes - Ammonia-free mixture won't corrode alloy rims or degrade tires - Effective in temperatures ranging from -5 to 120 degrees F (-21 to 49 degrees C) - Cool new blue color - Use with Bontrager TLR wheels, sealant, and rim strips for a complete tubeless system designed and tested to work together - Can be used in tubes to help seal punctures

This rim tape is crucial in upgrading your Tubeless Ready (TLR) Bontrager wheels to the next level of dependability and performance. - TLR Rim Strips are the light and easy solution to Bontrager Tubeless conversion - Tape is designed for wider Plus and Fat wheels - Can also be used as a universal tubeless solution for non-Bontrager rims - Use only with Bontrager TLR rim valve with round base - Rim tape replacement is recommended if removed from the wheel - One roll is 5m (197") in length

- To be used exclusively with Bontrager 29""/700c Tubeless Ready (TLR) wheels - TLR Rim Strips are the light and easy solution to Bontrager Tubeless conversion - Rim Strip replacement is recommended if removed from the wheel

• Synthetic elastomer gasket with 2X the holding power and 5X wear resistance of traditional gasket materials • Two stage seal design, improves sealing and stability on all presta valve stems • Adjustable compression, user can tighten the cap to increase holding power by 4X and compensate for wear •15 degree stem angle reduces stress on the valve stem from pump hose • 12.0g

Tubeless Valve/Tape Kit - Includes Tape, 2 Universal Valves & 1 Valve Core Wrench

Precision engineered for precise inflation of your Zipp wheels, these Zipp Tangente Valve Extenders take the hassle out of short Presta valves. - For use with threaded Presta (non-removable core) tubes - Knurled end to keep pump from slipping - Available in all lengths to match all Zipp wheels - 3mm hex broach in the barrel to guarantee a perfect seal when tightened

Works with Zipp butyl inner tubes with a removable core as well as other leading tubular tires and inner tubes that have removable cores. Available as a kit (3 extenders and 2 wrenches) or individually. - For use with removable valve core Presta tubes - Knurled end to keep pump from slipping - 3mm hex broach in the barrel to guarantee a perfect seal when tightened - Integrated air seal

- Premium alloy presta valve caps in an array of colors

A good pair of valves can make a big difference in the reliability and ease-of-use for any tubeless setup. Whisky's No. 7 Brass tubeless valves help ensure your tires are dialed for every ride. And, it's always a good call to keep an extra valve in a pocket or bag. - For use with Whisky tubeless rims and most others - 40mm length - Fits up to a 8mm valve hole - Removable valve core - Sold as a pair

- Repairs punctures up to 1/4 (6mm) - Optimized for temps down to 15degF (-9.4degC) - Synthetic later minimizes the risk of allergic reactions

Air-Liner GRAVEL is an insert for tubeless-ready gravel tires. Re-usable and very easy to install—as easy as mounting an inner tube on your tire—Air-Liner GRAVEL is compatible with tubeless-ready tires only and with 3-way valves (5-way valves are included for ultimate airflow). The insert can be used with sealant—preferably sealants without ammonia. - Air-Liner increases control, durability, performance, and protection of both tire and wheel. - Compatible with any wheel size up to 700c with 3-way tubeless valve, and tire widths from 31mm to 40mm. - The Vittoria Air-Liner is a tire insert, designed for use in tubeless tires. - Sold individually (single tire).

The Air-Liner is a high-quality polymer insert that replaces a portion of the air volume in the tire. This trait, combined with the shape, provides a tunable system that enhances your ride performance. The Air-Liner sidesteps the traditional compromise of stability vs. grip and allows your tires to remain stable, grippy, and controlled, even at low pressures. The Air-Liner is designed using a round cross-section with channels on the top and bottom. The top channel provides room for the tunable air chamber that sits directly beneath the tire tread. Upon impact, the corner edges of the channel flex first. This allows the tread to remain flexible, which increases traction without sacrificing impact resistance. The bottom channel allows for easy fine-tuning of the air chamber and allows for full compatibility of all valve core styles. The round cross-section shape mimics the natural shape of the tire and supports a greater contact area within the sidewalls of the tire casing. Side-to-side tire stability is increased, yet the tread remains soft and grippy. This improves cornering, climbing, and braking performance. - Protection: Both wheel and tire are protected by the Air-Liner insert. By cushioning impacts from within the tire, your expensive rim remains protected while eliminating flats caused by rim-strike impacts. - Control: The Air-Liner insert replaces air volume in the tire. The reduced air volume allows the tire to compress and rebound in a more controlled manner compared to standard tubeless systems. - Performance: Side-to-side tire stability is increased, yet the tread remains soft and grippy. This improves cornering, climbing, and braking performance. - Durability: This highly durable polymer material has been tested to a projected life of 2000 hours under normal riding, or 1 full hour of run-flat downhill use under a typical rider. - Air-Liner increases control, durability, performance, and protection of both tire and wheel. - Sold individually (single tire). Compatibility - Small: 1.9 – 2.25-inch wide tires - Medium: 2.25 – 2.5-inch wide tires - Large: 2.5 – 2.7-inch wide tires - X-Large: 2.7 – 4.0-inch wide tires

Don't let flats stop your ride! The legendary combination of durability, protection, and run-flat performance of Vittoria Air-Liners, made for your favorite tubeless-ready road tires! The Vittoria Air-Liner system provides unmatched bump compliance and impact protection, while ensuring bead lock at lower pressures. In the event of air-loss, the Vittoria Air-Liner Road system is designed for run-flat use. The insert increases the safety of your tubeless set-up by keeping the tire in place even in case of puncture - No risk to ride on the wheels! The Vittoria Air-Liner Road system is compatible with all tubeless road tires on the market. The lightweight material absorbs no sealant, while the proprietary Vittoria tubeless valves eliminates valve clogging. Whether you are training, touring, exploring, or racing, the Vittoria Air-Liner Road system will provide peace of mind and protection for the ride ahead. The Air-Liner Road bag contains: - One Air-Liner Road insert - Two Multiway valves Sizing recommendation: - Small, 700 x 23-26mm - Medium, 700 x 27-29mm - Large, 700 x 30-32mm

You'll ride with peace of mind when you pack a can of Vittoria's Pit Stop Tire Sealant. It contains pure latex foam sealant and compressed air to quickly inflate and repair your tire so you can get on with your ride. Available in three sizes for varying tire volumes: - Road Racing: inflates 21-28-inch tubulars up to 94 psi and 700c clinchers up to 87 psi so you can ride, instead of walk to the closest pump and top off the tire to full pressure. - 75mL: Repairs and inflates low-volume MTB tires in less than a minute. - 100mL: Repairs and inflates meaty 27.5-inch tires and cross country 29-inch tires in less than a minute.

The must-have kit for all tubeless tire users! The Tubeless Road Kit is the Vittoria all-in-one package for the best experience on your tubeless tires. The kit contains two Air-Liner Road inserts, one Universal Tubeless Tire Sealant bottle and the Road Tubeless Tool-kit - pliers and clips for easy tubeless tire removal. Contains two Air-Liner Road inserts, liquid sealant and pliers for easy tire removal. *DISPLAY BOX NOT INCLUDED THROUGH ONLINE SALE* Sizing recommendation: - Small, 700 x 23-26mm - Medium, 700 x 27-29mm - Large, 700 x 30-32mm

Vittoria introduces Universal Sealant, the new range of anti-puncture bike tire sealants designed for Road and MTB use. The formula of the sealant has been improved. Universal Sealant does not contain ammonia, repairs larger punctures (up to 7mm), acts faster, and is compatible with both Road and MTB tubeless tires and with any type of inner tube. It is easy to use thanks to its specific pour spout that allows the application of the sealant straight from the valve. Universal Sealant is the universal anti-puncture bike tire sealant.

High-quality alloy valve extension, perfect for tubes with removable valve cores. Each extension has a rubber seal for an excellent seal. These are a great investment, as they can be used time and time again. - For removable valve core inner tubes - High quality and reusable - Air-tight seal to prevent leaking - Vittoria etched logo

Vision's Presta Valve Extender simply screws onto your tire's built-in valve to make it long enough to protrude through your deep-section aero wheels (choose the right length to fit your rim depth). This ensures that you can keep your tires properly inflated. This lightweight and durable aluminum extender comes with a small tool (not shown) for an air-tight installation.

- Ingenious snap-In plugs do the work of rim tape at 1/3 The weight - Makes tire installation easier and nipple repairs faster than with tape - Red plugs fit rims with 8mm holes - Yellow plugs fit rims with 8.5-9.3Mm holes

Surly Rim Strips have one job and they do it well. The 58mm nylon rim strip is purpose-built for the Clown Royal Rim, and Moonlander bike.

The Surly TPU, or Thermoplastic Urethane, tube is a tough, airtight material lighter than traditional butyl innertubes. It is designed exclusively for the Surly Molenda tire, and allowed for a custom, oversized 6.2" width that maintains its structure, even when operating at low pressures. With the TPU tube installed, you can air down your Molenda tire to maximize contact patch for better flotation, traction, and overall performance.

Stan’s NoTubes Sealant is a thin, low-viscosity liquid that coats the tire interior and seals punctures quickly. Two ounces of Stan's in a tubeless tire can repair punctures up to 1/4" to keep you rolling. Stan's Tire Sealant is formulated to stay liquid in tires for up to seven months. Arid conditions require more frequent monitoring of sealant levels, but anti-freezing agents in our special formula allow Stan's Tire Sealant to be used in temperatures as cold as -30° F. One quart can convert up to 16 tires. - Suitable for use in tubeless tires and standard tubes - Designed to seal punctures up to 1/4" - Stable down to -30 degrees Fahrenheit - Non-hazardous, non-corrosive, non-toxic - Contains natural latex

Thin, low viscosity liquid with improved sealing capabilities over the standard NoTubes sealant. - Twice the sealing crystals compared to standard NoTubes sealant - XL crystals and standard crystals combine to seal larger punctures - Stable down to -30 degrees Fahrenheit - Not compatible with injectors or through valve cores

- Create an air tight seal for BST rims - Can also be used as a lightweight rim strip for any rim

A new and improved Tubeless Sealant Injector syringe supports the needs of modern tire sizes and the higher volume fill of sealant required, for a flat-free riding experience. The larger volume 150ml injector makes application of sealant simple, with no mess or waste of sealant. - Larger 150ml volume gives you the ability to inject sealant into today’s higher-volume mountain, gravel, and road tires with a single fill - New easy press-on adapter presses directly onto Presta and Schrader valve stems for quick fills without threading or additional parts - Patent pending top-fill, drip-free system features a cross-slit valve in the fitting paired with a unique air-relief channel in the injector body allows a precise fill of well-shaken sealant from the top for a convenient set-up with zero mess - Hose plug included for hanging on your workbench or mess-free storage in your toolbox

- Tubeless Valve compatible with Stan's ZTR rim - Sold as a pair

Tubeless setup should be a "set it and forget it" affair. SPANK's tubeless valves are constructed of durable brass material and a tapered round rubber base which fits a wide range of rim designs. The extra-long shafts accommodate even the deepest well rims and most troublesome of pumps. Sealed removable valve cores for sealant injection make set up or topping up a breeze. - Material: Brass shaft, rubber plug - Weight (g): ±18/set - Length (mm): 40 shaft (55 total length) - Features: 2 pcs per set, removable valve core for sealant injection

- Permanently seals tube punctures up to 1/8 inch - Non toxic formula installs easily through Schrader valves - Complete with valve core remover and filler tube - Slime keg fills 160 tires at 1/2 the price per ounce of the 16 oz size

Prevents thorns and other road debris from puncturing the inner tube and deflating the tire. - Packaged in a process that avoids the difficult to install "pigtails" traditionally associated with liners - Equipped with Soft-Tips that prevent friction flats at the overlapping seam - Sold in pairs

Specifically designed for the vulcanization of tube patches, valve patches, and rubber-based tube valve repair units.

- Individual vulcanizing patches in bulk - Cement and sandpaper sold separately

Setting up tubeless tires can be difficult. Add a single-wall, flat profile fat rim to the equation, and the setup can be downright frustrating. Problem Solver's oversized Super P-Nut’s help with this. First, the bottom of the nut is concave, so the valve can be pulled further through the rim, creating a better seal. The larger outer diameter of the nut provides better grip and leverage so that you can get the valve tighter than with conventional nuts. It’s like a normal P-Nut. Only more super.