ENVE AR40 Wheelset All-surface aero, at a Foundation-level price. The AR40 is the newest addition to ENVE's Foundation lineup, bringing wind-tunnel-tested aerodynamics to a wider range of riders. Developed in the Mercedes-Benz Formula One wind tunnel-tested in-frame at real-world speeds, not just isolated at 30 mph-the AR40's 40mm rim depth and 25mm internal width strike a rare balance of aerodynamic efficiency and all-conditions versatility. The AR40 is ideal for both hunting fast road PR's, and big gravel events. The AR40 delivers that signature ENVE performance and ride quality riders need, at a more economical price. The INNERDRIVE(TM) hubs, Sapim CX-Ray spokes, and full tubeless compatibility make the AR40 ideal for riders looking to inject increased performance into any kind of ride. Tubeless only. Features Aerodynamically optimized 40mm rim depth developed and tested in the Mercedes-Benz Formula One wind tunnel, in-frame at multiple speeds from 20 to 30 mph, for real-world aero performance25mm internal rim width optimized for tire sizes from 27mm to 50mm, offering exceptional versatility across road and gravel ENVE INNERDRIVE(TM) Foundation hubs feature an oversized 42mm ratchet drive system positioned inboard over the bearings for reliable engagement, reduced axle stress, and long bearing life Wide Hookless Bead design dissipates pothole and impact energy at the leading edge of the rim, reducing the likelihood of pinch flats Sapim CX-Ray J-Bend spokes with Alpina Nylock brass nipples tensioned to 120kgf, for a strong, reliable, low-maintenance build Patented molded spoke holes route carbon fibers around each hole without cutting them, for a lighter, stronger spoke face that maintains high spoke tension and reduces the risk of pull-through Tested and qualified to ENVE's gravel standards for confident riding on road and off SPECIFICATIONSRim Depth40mm Internal Rim Width25mm Hole Count24h Bead Type Wide Hookless Bead (Tubeless Only)Spokes Sapim CX-Ray J-Bend Nipples Alpina Nylock Brass Hub ENVE INNERDRIVE Foundation Hub Spacing Front: 12x100mm | Rear: 12x142mm Freehub Options HG, XDR, Microspline Brake Type Centerlock Disc Recommended Tire Size27-50mm (Tubeless Only)Max Tire Pressure (27mm tire)80 psi / 5. 5 bar Wheel Weight Front: 690g | Rear: 825g Wheelset Weight1, 515g avg. (+/- 3%) - includes tape and valves (HG freehub)Intended Use Road, Gravel | Enve | Ar40 700C Wheel Front, 12X100Mm | White | Graphics