would it work if i put a trials unicycle tire on a free style nimbus so i can do more trials stuff?
wrong forum, stuff like this belongs in RSU
but anyways, no this will not work. Trials tires fit a 15" diameter rim(referred to as a 19" wheel) you have a 16"diameter freestyle rim (referred to as 20")
this section is for vids. try the rec sport unicycling forum