Originally Posted by xargaun

I don't think they maintain a list because they don't have the time to test them themselves and they probably don't want to put themselves on the hook for endorsing any particular configuration.

In general terms, I have put together three of them and I think you would probably have no problem with any decent quality 26" mountain bike that is less than say 12-15 years old. The free radical should have everything you need, and the instructions that come with it are pretty good. So far the only thing I have ever needed that was not included was just a couple washers.

That said, the Radish is a pretty good deal. The free radical kit with the bags and stuff is about $500, the complete Radish is around $950. My wife has one, and its a decent bike. Not fancy but solid, and though it is quite a bit of money, when you subtract the cost of the free radical, bags, etc and the time involved on putting that stuff on another bike, the difference isn't too bad.