I have just come by a nice used set of Spinergy Revex 650 rims and tires. I own a road bike and a mountain bike. I would like to use the rims but they won't work with the brakes on the road bike - diameter too small. The size may work on my mountain bike but the rims are narrow (road vs. MTB). I was thinking of trying a 1.5" tire on them. Anyone here ever put 650's on a mountain bike or have any advice on what will work and more importantly what will not work?