The X12 135+ system fits all frames under the X-12 system with a width of 142mm.
X12 is a new hook and rigid axle system for the rear wheel, which has the ability to quickly mount and dismount the wheel as with a standard 9mm axle, while aiming to significantly improve stiffness. Attaching the wheel is done with either a special quick release (clamp) or an allen wrench, depending on the version chosen. The new system is not only stiffer, but also lighter than conventional axles, the ease of mounting and removing the wheel is the same as with standard hooks/axles, and in addition, after each wheel mounting, the position of the brake disc in relation to the pads is always identical, which is not always the case with the previous system, where precise positioning of the wheel in the hooks is not so easy.
Weight: 39g
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