alright well i saw this crazy old scwinn today that had a casette mounted solidly on the rear hub, no freewheel. The freewheel was in the cranks and delt with their engaging of the front chainrings. So could i use this hub on a fixie? I think itd be cool cuz then i could change gearing easily.
I have seen bikes with front freewheels, but I thought they had a rear freewheel too... Maybe I'm mistaken! I think the idea was that you could shift without turning the pedals, as long as the bike was moving (because the chain would keep moving, even though the crank arms would stop). I think it was a solution in search of a problem, so it was eventually given up on.
Lots of trials bikes run this setup (freewheel at the crank, fixed cassette hub). I don't know exactly why, but maybe someone will chime in. You can get fixed cassette hubs from Woodman components. You're right--with a cassette hub it would be very easy to change your gearing. It would also be much simpler to adjust chainline.
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Originally Posted by SSSasky
Lots of trials bikes run this setup (freewheel at the crank, fixed cassette hub). I don't know exactly why, but maybe someone will chime in.
As I understand it, a couple of reasons. They want smaller cogs in the back for greater clearance, which is easier with a fixed rear. Also they want to be able to reposition/backpedal the cranks without moving the chain for situations where the chain might be resting on obsticles.