Some spin bikes don't have alot of wheel to chainstay clearence so determining if your bulky garmin sensors will fit is hard to tell without seeing your bike. However I did mount a wired computer to a customers spin bike one time. The cadence sensor wasn't the problem, the wheel magnet and pickup were the tough part because of how tight the wheel was to the stay. I winded up using a flat magnet from an old spinergy wheelset on the rear weight(wheel) and combined with the smaller pickups of the wired computer it allowed me to squeeze everything in where it needed to be. Hope this info helps