700c, 27-Inch & 650c

The Serfas STX Inertia Folding road tire is constructed using their Alchemy Compound for lower rolling resistance and world-class grip. Independent testing conducted at Wheel Energy of Finland provided data showing Serfas STX Inertia tires as performing 8.12% better on cornering than the best selling road bike tire on the market. - FPS (Flat Protection System) - Dual Density Tread - Smooth Tread Pattern For Ultimate Performance - 120 TPI 3 Layer Construction - Max Pressure: 130psi

The Seca Sport is a worry-free performance road tire. It combines extra puncture resistance & superior tread life to the fast tread pattern. - Fantastic Everyday Road Tire - Lightweight Fast Rolling Tread Pattern - Fast Rolling 65a Center Durometer With Great Cornering 58a Outer Durometer - Bead: Folding - Pressure: 130 PSI - TPI: 60 - Weight: 230g (23), 260g (25), 300g (28)