can you mount a thinner tire onto a monty?
so you could have a trials tire, then an indoor tire?
Is that even neccessary?
nope, the mod rim is an inch or two smaller than a normal 20".
no.
not unless you can find a 19" freestyle tyre.
the monty/onza rims are a bit smaller in diameter to a normal 20" tyre.
and it’d be easier to get a new wheel for freestyle and change that over instead, esp since you can get a light duty 20" wheel for cheap these days.