1. How do I know which tires will fit on my rim. I have a 20in. rim that came with my Sun uni, but I want to put a 2.5in. wide trials tire on it. Will this work?
2. Will my wheelset fit on any frame( a Yuni frame to be exact)?
would the rim take a 1.5 tire though? I am trying to decide whether to buy (this summer) a Yuni frame and a new saddle, then taking all my sun stuff and putting it on the frame. or just buying the Nimbus $169 trials uni.
You can't use a trials tyre like on the nimbus trials uni on a normal 20" rim, so no. 20" triasl unis have 19" rims to fit the bigger tyre without being much bigger. Plus I get the impression the sun rim isn't that great, so for trials you'd want a better rim, like the alex dx32 on the nimbus trials. You can put a bigger tyre on, but not a normal triasl tyre.