Super fast, extra grippy, and race worthy. These feature a smaller core allowing the high rebound thane to flex through the inconsistent surfaces, and loads expirienced in high speed racing.  That flex allows the surface to conform and stick those hairpin turns.  Now you can just grab the lead while your competition is busy pre-drifting that hairpin.  The roll speed is bananas, so if you do need to shed some speed, they have a smooth consistent drift.

70mm x 55mm - 78a red, and 81a blue