Schlumpf Pre Tightening Bolt M12
Schlumpf Pre-Tightening Bolt (M12)
Schlumpf Special Screw for pre-tightening axle bolts on Schlumpf KH uni hubs M800
Using this bolt, its very easy to tighten the crankarm to the recommended torque without causing damage to the standard axle bolt or the shifting shaft.
8mm Allen key required.
After pre-tightening, this bolt is replaced with the standard axle bolt.