hamster":2c2yk2dn said:I'd suggest that you cobble something up as a testbed to see if you (and your knees) get on with SS.
After that you will have a better idea what you want and can then build up a snazzy machine (or abandon the whole thing as a daft idea.)
Theres no need for singlespeed to be the knee destroyer its made out to be, simply lower the gearing and it should help you spin faster which is no bad thing either. Velomaniac runs a seemingly crazy low gear but it doesn't hold him up any, in fact on long drags he's often taken the lead.