Race Face Aeffect R 27. 5" Wheel Rough and Rowdy Riders who enjoy riding more aggressively on the trails will want more durable wheels underneath them. This will allow them to ride with confidence. The Race Face Aeffect R 27. 5" Wheel is made to handle all kinds of enduro and all-mountain punishment. The wheel has a 6069 aluminum rim with a 4. 5mm offset spoke bed to provide spoke tension balance, increasing wheel stiffness and overall fatigue life. The rims are tubeless-ready for a smoother ride, better traction, and fewer flats. With the new Trace hub, you'll have 10deg of engagement on the rear so you can go from coasting to pedaling much faster. Features30mm wide rim works well with wider tires6069 aluminum construction balances durability and lightness Tubeless-ready for a smoother ride, better traction, and fewer flats Trace hubs with 10deg of rear-wheel engagement SPECIFICATIONSWheel Size27. 5"Material6069 Aluminum Outer Width34mm Inner Width30mm Rim Height-Spoke Drilling28HValve Type Presta Tubeless Yes Tire Type Clincher Brake Compatibility Disc (6-Bolt)Front Axle15 x 110mm Rear Axle12 x 148, 12 x 157mm Intended Use Trail, E-Bike, Enduro Approximate Weight1920g (Per Set) | Race Face | Aeffect R 27. 5" Wheel 12X148, Xd Rear | Aluminum