Rear Drop Out Angle on Vintage Bike
10-09-23, 06:41 PM
#1
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Rear Drop Out Angle on Vintage Bike
I measure about 73 degrees on this bike. 64 cm seat tube. It was built for a claw derailleur hanger, but I would like a more modern set up. Are there “common” angles that were used in mfg bikes? I see a few 72 and 74 degree dropouts from suppliers.
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10-09-23, 07:58 PM
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Just to be sure you are talking about the angle between the stays, not the angle of the slot relative to... Andy
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AndrewRStewart
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10-09-23, 08:44 PM
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Also, used a protractor, should have used a tape measure and a trig table!
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10-10-23, 04:27 AM
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Unless they are socket style dropouts, you can make a single angle dropout work for a wide range of angles between seat and chain stays. The tabs are generally wider than the stays and you can shape them to flow better with the angle of the stays.
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10-10-23, 07:19 AM
#5
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These are indeed tabs, not sockets, so I do have some wiggle room. Can a socket style be brazed over a slotted stay or would that leave too weak a connection?
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10-10-23, 09:23 AM
#6
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10-10-23, 04:47 PM
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I wouldn't try replacing tabbed dropouts with socketed ones. Sounds like a recipe for frustration and early failure.
10-13-23, 04:59 PM
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If you cut off the slotted part, the dropout isn't going to fit the frame. If you don't cut out the slotted part, it's going to be structurally questionable.
