Rim Material: aluminum Wheel Size: 29in Rim Type: Hooked Rim Depth: 19.8mm Rim Width: [external] 34.7mm, [internal] 30mm What Our Gearhead Experts Are Saying:"This wheelset is my go-to for aggressive trail and enduro. The tubeless setup is painless, it’s strong enough for big hits, and the engagement is better than expected. Drop it on any bike and you get instant handling confidence without paying carbon prices."XT WH-M8120 29in Boost Wheel harnesses Shimano’s engineering for trail riders who demand reliable, responsive performance on technical descents and fast singletrack. The lightweight aluminum rim, offset spoke lacing, and centerlock compatibility deliver a stiff, efficient wheel that tracks through rough lines. Tubeless setup is fast, supporting lower pressures for extra grip and fewer flats. Paired with a Micro Spline freehub, this wheel is ready for the latest 12-speed drivetrains—so you can stomp the climbs as hard as the descents. Double-butted, J-bend spokes offer lasting durability for seasons of laps, and boosted axle spacing increases stability, so you always feel in control.