crankbrothers Opium DH MTB WheelsetSturdily built to keep you upright and unfazed as you dive downhill, this Opium wheelset by Crank Brothers gives a tough and trusted performance as you push every gravity-battling ride to the limit. Strong, stiff and speedy, each wheel maintains a hard-hitting form as you ascend to the top of the mountain and drop back down. Equipped with a 28mm internal width, each rim gives a suitable surface contactt area to provide balance and composure over the roughest routes. Durable and Dependable Downhill MTB Wheelset Specially-designed to deliver impressively low inertia by distributing mass closer to the hub, speeding up and slowing down is far more efficient and powerful as you master every route. The 6061-T6 rim construction ensures a robust and reliable experience as you tear from trail to trail while the Opium hubs provide superb support and a smooth spin, however harsh the terrain becomes. The 3-pawl, 11-speed-compatible freehub also adds an extra bit of pace and power to proceedings. The tubeless-ready, hole-free rim system also enhances the toughness of this fantastic pairing, with Boost axle sizing creating a stiffer, more responsive form when you get down and dirty. Bold and brilliant, the Crank Brothers Opium DH MTB Wheelset is a top team for tackling the most daring downhill courses. Features: Rim Material: 6061-T6, smooth weld joint with shot-peen black anodising Internal Rim Width: 28mm Rim Depth: 23.4mm Spoke Material: Sapim Stainless-Steel with Hollow 7075-T6 Aluminium nipples Hub Material: Opium, 6061-T6 Hub Bearings: Sealed cartridge, 2x 6903, 2x 6902 Hub Axle Sizing: Front: 110x20mm Boost; Rear: 12x150mm Boost Freehub: 3-pawl, 21T, alloy, 11-speed HG mountain-style cassette compatible Tubeless-Ready: Yes Weight: 2175g Buy Crank Brothers Wheels & Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.