I pondered that a couple of years back - didn't want to swap tires or wheels or frankly take my bike on and off, since I was riding virtually every day at least once, often morning and evening, doing a triathlon training program and some one-on-one computrainer coaching sessions with a cycling coach. So I decided to use my old Cannondale mt bike. It worked but it's not exactly the same.

I bought my own computer based trainer recently to use over the winter, not Computrainer brand, but the one they sell at Performance because I ended up getting it for about $800 out of pocket for an $1700 or $1800 regular price trainer. I am NOT putting my good Roubaix on there, I don't want to risk damaging an expensive carbon wheel. Just gonna get myself a cheap road bike to throw on there.

maybe even something used of CL or from a thrift shop -