Bicycle Mechanics - Speed Freewheel upgrade option: What's compatible with...

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Sigurdd50
05-28-05, 03:49 PM
Current set up:
Suntour 'Perfect'
on '72 Bottecchia (Campy Record hub)
the current 5 cog has a 32T on the high end, and I don't really care of that huge jump in gear ratio (this is more of a commuter/around townie bike). Seems a 6 -speed with something on the order of 14-28 range would be sweet.

since Ebay seems to be a great source of old stuff like this (at fair prices), can anyone clear the water of what I should be looking for as far as Brands/models?
Some are listed as SIS (Indexed?) which seem too mod

thanks

muccapazza
05-28-05, 09:24 PM
Hi again, Sigurdd50. Here's a page with some freewheelin' info: http://sheldonbrown.com/freewheels.html . It says that Italian was different until the Japanese manufacturers took over the freewheel market in the mid-seventies, so don't know if the shimano I offered will work. If you can get the Suntour off easily, and have a ISO standard bottom brackket lockring handy, you could check it out, if you can screwthe lockring on the hub threads, you should be able to screw on the shimano. If not, looks like you'll be seraching ebay for an italian threaded freewheel. good luck. if it works, let me know and I can get that freewheel to you. cheers.
DieselDan
05-29-05, 03:50 PM
Italian and English threading aren't that much different, and you can put an English treaded freewheel on an Italian threaded hub, but you cannot put an Italian threaded freewheel back on that hub. The Japanese uses English threads most of the time. Even if you the freewheel is labeled SIS, you can shift it with friction shifters.