XTR's Lightest Race Wheel Built around SHIMANO's featherweight 29.6 mm hooked carbon rim, titanium straight-pull spokes, and updated XTR hubs, these wheels deliver when efficiency matters most. Expect fast engagement, low drag, and precise control for high-level cross-country racing. Features 29.6 mm Carbon Rim: Lightweight hooked tubeless rim balances efficiency, control, and durability for elite-level XC racing Titanium Straight-Pull Spokes: 24H titanium spokes optimize stiffness and strength while minimizing overall wheel weight Fast Engagement, Low Drag: 3.5-degree engagement delivers quick acceleration with reduced coasting resistance Serviceable Cartridge Bearings: Updated XTR hubs use stainless cartridge bearings for smooth rolling and easy maintenance XC-Ready Standards: CENTER LOCK brake mounts and MICRO SPLINE compatibility complete the race-ready package Race-Tuned For Efficiency The updated XTR hubs are tuned for XC racing, delivering rapid 3.5-degree engagement, low drag, and consistent efficiency. Optimized seals and serviceable cartridge bearings support dependable performance through high-intensity race efforts. Ultra-Light Carbon Rim SHIMANO's lightest production XTR rim features a 29.6 mm hooked carbon tubeless profile engineered to maximize speed and efficiency without sacrificing durability for high-level cross-country racing.