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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series B rear ends
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<blockquote data-quote="Albervin" data-source="post: 21320" data-attributes="member: 586"><p>I looked into it as I planned this little task. "Apparently not" is the answer. If you look at a lot of pictures of Bs you will notice the angle of the H27/1AS can be quite steep due to the length of the torque arm. I would have thought this to be not the ideal geometry but nobody seems to have thought it worrying enough to act upon. Steve, the problem with B is the short(er) RFM changes all the angles of fit for a guard made to C specs. You are effectively trying to squeeze 1/2" from the radius which may not seem a lot until you try to align everything. The profile of a B chainguard is wider than a C unit and nearly all of those I have seen have either had a hammer or press taken to them or been battered by the seat stay bracket bolts. The 2 Phils certainly did not believe in wasting space. The complete opposite is my pre war Douglas which has a lot of room between components hence its very lengthy wheelbase...</p></blockquote><p></p>
[QUOTE="Albervin, post: 21320, member: 586"] I looked into it as I planned this little task. "Apparently not" is the answer. If you look at a lot of pictures of Bs you will notice the angle of the H27/1AS can be quite steep due to the length of the torque arm. I would have thought this to be not the ideal geometry but nobody seems to have thought it worrying enough to act upon. Steve, the problem with B is the short(er) RFM changes all the angles of fit for a guard made to C specs. You are effectively trying to squeeze 1/2" from the radius which may not seem a lot until you try to align everything. The profile of a B chainguard is wider than a C unit and nearly all of those I have seen have either had a hammer or press taken to them or been battered by the seat stay bracket bolts. The 2 Phils certainly did not believe in wasting space. The complete opposite is my pre war Douglas which has a lot of room between components hence its very lengthy wheelbase... [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series B rear ends
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