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. FEATURES: Ultimate versatility for the on and off-road rider 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 SPECS: Spokes: Sapim CX-Ray J-Bend Hub: ENVE INNERDRIVE - Foundation ENVE INNERDRIVE - Foundation Hub Spacing: Front: 12x100 | Rear: 12x142 Nipples: Alpina Nylock Brass Spoke Tension: 120kgf Brake Type: Centerlock