I’ve got a ~17 years old Qu-ax trials uni in my collection that is equipped with the Qu-ax 10 spline hub. I lately used its 145mm cranks to test them on a friend’s 24" muni from the same decade (which originally has 170mm cranks). After putting the cranks back onto my trials the right crank has some play which I can feel when riding with changing load (e.g. when idling). Could be that this was already there before swapping cranks but I didn’t notice it as much as I now. There was no such play when the cranks sat at the muni btw. I’ve already asked Qu-ax if this issue is known from that generation of hubs and they couldn’t help me any further than proposing more torque on the screw that clamps the crank onto the hub (pretty quick reaction though for such an old-timer question). Now I think I reached a pretty high torque (15Nm or something around that on an M6 screw…?) and still the crank can move a little bit.
Does anybody have experiences with this? Can anyone advise anything more than what Qu-ax did?
If I don’t do anything about it I guess over time it will wear out and finally a new hub and new cranks will be due.