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Posted by: Gabe TITLE: BALLOON:   1940s Roll Fast Crank?
I~ve got an 1940s Roll Fast with a broken crank. Specifically the pedal snapped through the crank arm. I was wondering where I could get a replacement crank set (or better yet just the crank arm) that would fit this model.
by: 72.1.181.203
Posted by Gordon
It sounds to me like he is working with a 2 or 3 piece crank since he has suggested just replacing the arm. If it is a 2, it probably is earlier than 40~s. If it is a 3, it might be 50~s or 60~s.
by: 66.113.47.14
Posted by ken
I give Brian about an 80% chance of being right on this one, assuming it~s an ashtabula crankset. There is more than one thread count or diameter in use on these, (Schwinns of that era being a notable example), more than one chainring center diameter and more than one type of bearing cover/seal arrangement, so should you wish to use the existing chainring and fit to the existing races, you will need to remove all the hardware from your broken crank and match its thread. If you~re willing to use any chainring with the crank it came on, the only real interface is the bearings. So four times out of five, perhaps, the crankset that comes to hand will serve.
by: 209.7.150.163
Posted by Brian
Nothing special about that crank. Any bike shop should have one or just buy a complete bike at Salvation Army or thrift store.
by: 74.243.236.202

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