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