Funny you should mention it, I put one on my Schwinn searcher just the other day. It's not exactly a run of the mill mountain bike, but it should give you some idea. I like the way the seat sits, I can site much farther back and a little lower, which is much more comfortable for me. My only complaints are that it could be about an inch wider and it needs a LOT more padding. My project for this week is to locate some upholstery type vinyl (black of course) and some nice thick padding. If I do the padding right, it should take care of the width issue too.