I have my trainer sitting on my treadmill. It's a club quality (StarTrak) treadmill but there's no way you could easily modify it for a bike. It's a very wide model already but you'd need much more bed length which would screw up the incline feature and the speed would have to increase beyond 12MPH (maybe not). I initially had the stem locked straight onto the front bar of the treadmill (no handlebars) but that is soo different from a real ride that I hated it.