The AR40 is the latest addition to the Foundation lineup. Featuring an aerodynamically optimized 40 mm rim depth front and rear, with a 25 mm internal rim width, the AR40 is designed to deliver ultimate versatility for the road rider and racer looking for performance on and off-road. Borrowing from SES rim design knowledge, the AR40 is aerodynamically tuned for 29 mm – 30 mm tires and delivers drag reduction that punches above its depth and price point. While designed primarily for on-road performance, the AR40 has been tested and qualified to ENVE’s gravel standards to ensure safety and speed for gravel riding and racing applications. Specifications Spokes: Sapim CX-Ray J-Bend Hub: Front: ENVE INNERDRIVE – Foundation Rear: ENVE INNERDRIVE – Foundation Hub Spacing: Front: 12x100 | Rear: 12x142 Nipples: Alpina Nylock Brass Spoke Tension: 120kgf Brake Type: Centerlock Effective Rim Diameter (ERD): 579mm (+/- 3mm) Internal Rim Width: 25mm Sidewall Width: 3.6mm Pinch Flat Technology: Wide Hookless Bead Hole Count: 24h Depth: 40mm Tubeless Tape Width: 29mm Tubeless Valve Length: Front: 61mm | Rear: 61mm Spoke Tension: 120kgf Brake Type: Centerlock Spacing: Front: 12x100 | Rear: 12x142 Rim Weight: Front: 425g | Rear: 425g Wheel Weight: Front: 690g | Rear: 825g Wheelset Weight: 1515g (Includes Tape and Valves – HG Freehub) Recommended Tire Size: 27–50mm Minimum Tire Size: 27mm* Maximum Tire Pressure (Minimum Tire): 80 psi | 5.5 bar
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