On my new street uni my pedals come loose every 5 min, its really pissing me off. Any ideas on how to keep it snug? Remember the koxx cranks require a washer inbetween the pedal and crank.
Ok, from my knowlage the pedals are threded so if you are riding forwards, they will tighten themselfs, But i stared at my pedals/cranks and spun the pedal, and i am 99% sure that pedaling forwards will unscrew them, but yet the R is on the right side and the L is on teh left side.
A search of the forum for “precession” will find other threads about it.
Make sure that you don’t have pedals with 1/2" threads. There are two primary pedal sizes. 1/2" for kids bikes and bikes with one piece cranks and the more common 9/16" size that most unicycles now use.
1/2" is just slightly smaller than 9/16". A 1/2" pedal in a 9/16" crank hole will undo itself very quicly.
It is also possible that your pedals are just slightly out of spec and the threads are just a little bit too small. It has happened before. If that is the case you may be able to return them to the place you bought them for a replacement.
The threading is correct to keep the cranks from unscrewing as you ride forwards. It isn’t obvious at first that it is correctl If you locked up the bearings in the pedal the pedals will unscrew as you pedal forwards. At first blush it seems that can’t be right. But it is, because of precession.
Make sure that the right crank and the right pedal are on the right side of the uni. Make sure that the left crank and left pedal are on the left side of the uni. The pedal threads will be correct to keep the pedals from loosening on their own.
If the pedals really are too loose in the cranks then you need to get proper pedals before you ruin the pedal threads in the cranks. The easiest way to check is to get a pair of known good pedals and put them on the uni that is having problems. If the known good pedals stay tight then the other pedals are bad. If the known good pedals also get loose then the cranks are bad.