Forged BB crank ID

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Re: Forged BB crank ID [Re: RMCHRGR] #2798651 07/19/20 05:05 PM 07/19/20 05:05 PM
Joined: Jan 2003 Posts: 25,958 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,958 Rio Linda, CA	Originally Posted by RMCHRGR I am wondering if the reason there is so much more material there is because it might be a 440 crank that had the journals cut down to fit into the 400? I'm thinking if it was a cut down RB crank there would be a radius instead of an undercut where the journal meets the thrust face. '74 and later BB cranks had a larger 3.780" diameter thrust surface. If still in doubt, measure the stroke. The INTERNET, the MISinformation superhighway

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