Fulcrum 6-Bolt Red Metal XL MTB Rear Wheel The secret of Red Metal TM 1 XL&8217;s success is to be found in a perfect mix of performance, lightness & looks. The aluminium spokes designed by Fulcrum&174; number 24 for the rear wheels. We employed our 2:1 technology to improve torque transmission on the rear wheel. The aluminium hubs have 20 mm axles that notably increase the stiffness of the wheel, which improves manoeuvring precision & eliminates the annoying phenomenon of pad-disc brake contact. The smoothness of the Red Metal™ 1 XL is guaranteed by industrial bearings with double seal. The maximum smoothness, virtually maintenance-free. Red Metal™ 1 XL wheels are compatible with tubeless tires & with all ISO six-bolt braking systems. Average weight: rear: 915 g Buy Fulcrum MTB Wheels from Chain Reaction Cycles, The Worlds Largest Online Bike Retailer