Shark aluminum upper arms

These upper arms use bearings on the pins for a more free and precise assembly. A quick adjustment of the adjustment screw allows you to match the marks and adjust the track width.

A special insert allows you to tighten the arm for an even more precise feel without sacrificing the smooth and fluid movement of the bearing/arm. The arm also includes a set of special shims that allow you to quickly move your arm forward and backward for pinch adjustment.

The link is made with a hardened tool steel alloy that is very resistant. It features marks to facilitate your adjustment while maintaining an incredibly durable result.