Fulcrum Red Zone XLR 6-Bolt Rear Wheel It is the most &8220;forward-looking” version in the Fulcrum&174; range dedicated to Freeride/ Enduro. Extremely strong & sturdy, the Red Zone TM XLR is both light & reactive. The Freeride & Enduro are disciplines that put the wheels to real test. The XLR, too, is always ready & able to face any terrain. SET OF SYNTACE X-12 135/142MM REAR WHEEL ADAPTORS: the O.L.D. of the 12mm Thru-Axle rear wheel can be increased from 135 to 142 mm. QUICK RELEASE: Steel spine & eccentric, lever with drill lightening & aluminum die. Eccentric-closure system allows cyclist to modulate the pressure necessary for heightened sensitivity to find the proper closure for the block. Easy to use, with a material resistant to wear & tear, rust, & pressure. Buy Fulcrum Red Zone XLR 6-Bolt Rear Wheel from Chain Reaction Cycles, the worlds largest online bicyle store