I guess that the crank bolt worked its way out. I was practicing hopping and noticed it after I had been hopping for a short while. I tightened everything back, but now the right hand crank still wobbles a bit.
The crank arms are aluminum ISIS (cheap ones that came with the Sun unicycle I have). The hub is a Nimbus 36H (CroMo). I’m sure the crank is toast, so I ordered another set. I’m hoping that the hub isn’t damaged too …
Do you guys put thread locker on your crank bolts? I was considering that …
I put thread lock on mine but I take a minute before each ride to check my cranks, pedals, saddle seat post and touring bar. I give every thing a good wiggle and tighten if loose.
The crank bolts shouldn’t just come loose. If it’s a cheap unicycle, they often come without crank spacers.
The ISIS interface is designed to be used with spacers. If you don’t have them, the cranks will wear out prematurely. Get a selection of different size spacers and use the biggest ones that don’t make the cranks wobble. Once they start moving again, fit the next size down and so on.