Hi everyone!
I just purchased a KH 24’’ muni and have encountered a problem. No matter how tight i screw the frame on, it doesn’t seem to be stable. Don’t really know how else to describe it really…
When I mount the unicycle, it “clicks” a few mm to the sides (perpendicular to the weel) as if it wasn’t screwed on tight enough. I’ve assembled unicycles before, but this is new to me…
Anybody got any ideas?
Thanks!
Bearing clamps are not supposed to be very tight. This sounds like a hub issue. Do you have spacers between your cranks and bearings?
If you by spacers mean metal rings that makes sure the bolts doesnt “unscrew” themselves then yes.
It’s almost as if one of the bearing houses is too small…
Too BIG I mean 
Off-topic: how do I edit my posts?
You can only edit posts in a ten minute window after posting.
It sounds to me like you need to have bearing spacers. Basically they are big fat washers that go directly on your hub and hold the bearings in a fixed position so they cannot move. They’re pretty cheap from unicycle.com
Check your seat bolts too – a loose & creaky seat can fool you.
I just recently did some work on my uni, I tightened the seat bolts, but not really well (forgot to go back over them and crank em down). I noticed a strange “clunk” when I got on, couldn’t figure it out… Until half way through my ride I had lost one seat bolt and the others were getting real loose. Not a great feeling. Definitely makes your uni feel unstable.
I also had a funny click when one if my crank bolts was not fully tight (you could feel the movement and hear it once or twice on every hard pedal stroke). I was convinced it was the hub, but nope – just a slightly-loose crank.
When you’re as paraoid as I am, sounds like this will drive you absolutely nuts.
I’ve had a similar experience, hearing a click when I’d mount the uni, and when I’d try twisting the seat/frame while off the uni. Pulling the cranks and putting a liberal amount of anti-sieze on the splines made it go away.
It feels like the frame is moving sideways on the bearing right?
There are a couple things this could be;
You could have a bad bearing which has internal slop, you would be able to feel this trying to move the bearing with your fingers when the unicycle is disassembled.
Your bearing could be slipping on your hubs spindle. This can happen if you don’t use crank spacers or the wrong sized spacers allowing the bearing to slide “out” on the spindle toward the crank. You would probably be able to see a space between the bearing and the bearing spacer if this were the case.
Your bearing clamp might be oversized as you have guessed, I have never heard of this happening with a regular setup but is possible. To fix it you could file away some material from the bearing cap where it meets the frame to allow it to be tightened further, just don’t make it too tight or you can crush your bearing housing.
Or I guess it is possible that you have a 40mm bearing in a 42mm bearing housing, but if it’s a KH wheel that is quite unlikely.
Or your hub could be getting sloppy, or possibly the cranks or pedals.
Does it have a KH hub on it?
If you bought it new, I suggest sending it back immediately before you waste any more time and effort on it.