The 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. Ultimate versatility for the on and off-road rider with 1515g Wheelset Weight Avg. (+/- 3%), Inner Rim Width: 25mm, Aero optimized tire size: 27mm, Tested and qualified to ENVE's gravel standards, For Use With Tubeless Tires Only.