The term Muni is applied variously. At one level, it is off road
riding, doing big distances cross country. At another, it is riding up
and down natural obstacles in a fairly small area such as a disused
quarry.
Trials seems to be all about moving onto and between obstacles that
have either been constructed for the purpose, or which are part of the
urban environment (walls, posts, seats etc.)
There is some overlap. However, on the whole, the Muni rider will be
riding along a route, and the trials rider will be in one place doing
ever more technical moves. Munis roll and trials unis do a lot of
bouncing.
As Munis roll, they tend to have large-ish wheels which are better for
speed, covering distance, and dealing with uneven ground.
As trials unis bounce, they tend to have smallish wheels that are light
but strong, and fat squidgy tyres.
You can do long distance on a 20, or trials on a Coker. However, if
you are going to get heavily into one discipline (Muni, trials, road
riding, freestyle, etc.) then it makes sense to have a uni optimised
for that discipline: the right wheel size, tyre, and cranks.
That is why so many of us end up with several unis.
--
Mikefule
I don't know where I'm going, but I've got to get there soon
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