Freewheels are getting mighty expensive out there on Ebay anymore and many are likely worn down some. You can still get a very few SunRace and Shimano sprocket combos but no 5 speeds that I know of. Somebody is making 120mm 5 speed cassettes now though but those are pretty spendy as well.
You guys still pushing those 53x11s and such can have at 'er but you won't be having me hanging in there to suck your wheels.
