S-Spec tires utilize Tiogas ultra-lightweight CYLEX 120 TPI casing.
Feather light and super supple S-Spec tires conform better to track surfaces for buttery smooth runs.
Lightweight folding bead only.

Features aggressive shoulder tread for increased acceleration grip. The Fastr React is best suited for rear wheel use or in conditions where more grip is needed.

+ CYLEX 120 TPI Ultralight Casing
+ UTC Rubber Compound
+ Folding Bead