The tread pattern interlocks with the road surface for superior cornering grip

made thicker in the most delicate support points to maximize comfort even on bumpy terrain

in all conditions

The ultra-reliable freehub system transfers the highest pedaling loads resulting in direct power transmission

They are designed to have an ultra-low stack height

ENVE AR40 Freehub Body:SRAM XDR The tread pattern interlocks withThe AR40 is the latest addition to the Foundation lineup. Featuring an aerodynamically optimized 40mm rim depth front and rear with a 25mm internal rim width, the AR40 is designed to deliver ultimate versatility for the road ride and racer looking for performance on and off road.