WTB Trail Boss Comp 27.5" Tire As its name suggests, the Trail Boss was designed to have you reign authority over the trail. The WTB Trail Boss features a snug enough tread spacing for high speed, drag-free assaults, yet its knobs are blocky and elevated enough to really gnash when it comes time to hit the brakes and corner with grace. A rounded profile and staggered, supported side knobs relentlessly claw for traction even when the trail loses its flow. The Comp model features WTB's Durable Casing which offers a high ratio of rubber to thread for a resilient casing that can hold its own to the demanding ways of the trail. Employing WTB's DNA Rubber Compound, the Trail Boss Comp's tread is versatile and long-wearing, while the side knobs remain supple, optimizing efficiency, traction and durability; a perfect recipe for XC training or carousing the trail. Features: DNA Compound: proprietary 60 durometer rubber compound offers the ideal mix of rolling efficiency and traction for XC and trail riding applications Durable Casing: high ratio of rubber to thread protects against trail threats and urban pleasantries Specifications: Wheel Size: 27.5" Width: 2.25" Level: Comp Compound: DNA Casing: Durable Bead: Wire Type: Clincher Weight (claimed): 840g Usage: XC/Trail Conditions: Dry to Damp / Hardpack to Loam Vendor Part#: W010-0551 | WTB Trail Boss Comp 27.5" Tire Black, 27.5" X 2.25"