SUNringle Duroc SD37 27. 5" Wheel Trail-ready strength The SUNringle Duroc SD37 is a no-nonsense trail and enduro wheel built around a double-walled 6061 alloy rim with a 32mm internal width - wide enough to properly support modern trail and enduro tires. Laced 32H to a SUNringle SRC hub with sealed cartridge bearings, it's a durable, tubeless-ready setup ready to bolt onto your bike and ride. Features32mm internal / 37mm external rim width for confident tire support on modern trail and enduro rubber Double-walled 6061 alloy construction for reliable strength without unnecessary weight Tubeless-ready with Presta valve compatibility32H lacing with sealed cartridge bearings for long-term durability and easy serviceability SPECIFICATIONSRim SUNringle Duroc SD37Rim Material Double-walled 6061 alloy Wheel Size27. 5"Internal Rim Width32mm Hub SUNringle SRCHub Bearings Sealed cartridge Front Axle15x110mm Boost thru-axle Rear Axle12x148mm Boost thru-axle Brake Type Disc only - 6-bolt rotor interface Tubeless Compatible Yes (Presta valve)Intended Use Trail, Enduro | Sun Ringle | Duroc Sd37 Comp 27. 5" Wheel Rear 12X148 6B Hg | Aluminum