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Old 2018-08-20, 10:47 AM   #6
kunstrasen
Unicyclist
 
Join Date: Feb 2015
Location: Jüchen, Germany
Age: 50
Posts: 258
It is a combination of different tolerances.

Long ISIS interface on hub + small width crank (short ISIS interface) > it can happen that the carnk bolt will touch the hub axle before the crank is thight.

In addition it depends on the axial diameter of the ISIS interface. If you have a large ISIS hole in crank and smallish ISIS axle, crank will mover further on axle (and vice versa).

To my experiance the new VCX cranks have a thight fit (axial) and they are quite wideish (for crank roll tricks). Then you typically need 7 or 8mm spacers instead of 6mm to get a proper fit.
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