Enve Foundation AR40 Tubeless Disc Wheelset The Enve Foundation AR40 Wheelset isn’t just a standard wheelset; it’s engineered for real-world speed. Tested in the Mercedes-Benz Formula One Wind Tunnel, the AR40’s aerodynamic profile is fine-tuned for performance at 20-30 mph (32-48 kph), ensuring you slice through the air with less effort. Whether you’re sprinting for the line or cruising on a long ride, the AR40’s design, inspired by ENVE’s SES range, translates to tangible efficiency gains for riders of all levels. Built for Adventure: Gravel-Rated and Race-Ready While the AR40 excels on the road, it’s also gravel-rated, meeting ENVE’s rigorous standards for off-road durability and safety. This makes it the perfect upgrade for modern road, all-road, or gravel bikes. Pair that with the INNERDRIVE™ hubs, featuring oversized steel ratchets for instant, reliable engagement, and you’ve got a wheelset that’s as robust as it is responsive. Upgrade to the AR40 and experience the confidence of a wheelset that’s ready for any ride, anywhere. Specifications: Depth: 40mm Inner rim width: 25mm External rim width: 32mm Tubeless Tape Width: 29mm Tubeless Valve Length: 61mm Internal Moulded Spoke Holes Hole count: 24/24 For Use With Tubeless Tyres Only* ENVE Innerdrive Foundation Hub CL - 60t Engagement Sapim CX- Ray J-Bend Spokes Tubeless, Wide Hookless Bead Design Intended Use: Road and Gravel 5-year Factory Limited Warranty and cover through ENVE's Incidental Damage Protection Programme *Tyre must be Tubeless and listed as "Approved/Recommended" on ENVE's Tyre Compatibility Page.