700c, 27-Inch & 650c

- Road FPS - Light Weight Training Tire - 60 Durometer Center Ridge for Long Life & 58 Durometer Sides for Enhanced Cornering Capability SPECS - Bead: Folding - TPI: 120 - Dimension: 700 x 23, 700 x 25, 700 x 28 - Pressure: 130 PSI - Weight: 210g (23), 220g (25), 230g (28)

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