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Old 11-09-11, 02:38 PM   #1
cycle_maven
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Denting Chainstays for Tire Clearance

I have an old chrome-moly steel frame with high-ten chainstays-

Can I dent the chainstays on the inside to get more tire clearance? What's a good way to go about doing this? Would a vice and a block with a channel gouged in it and a short piece of hardwood dowel work OK?

Thanks for your assistance-
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Old 11-09-11, 02:43 PM   #2
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That could work, or that could fail miserably, depending on your technique.

Note that it may cause the dropouts to pull, so you may have to realign the back end.
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Old 11-09-11, 03:08 PM   #3
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It can be done. Check the pics in that blog post.
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Old 12-08-11, 07:55 PM   #4
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Must be a more technical term for it. Good question tho...
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Old 12-09-11, 06:14 PM   #5
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It's easier before the frame is built (courtesy Richard Sachs Bicycles): http://www.flickr.com/photos/9866331...7600706475164/
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Old 12-10-11, 07:34 AM   #6
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I have done it before plenty and it reeks much havoc. I have a device I made that is part of a motor press (mechanics press) that allows me to "reach around" the opposite chain stay. and apply pressure from the intended direction. It's rarely with the effort on anything but fat/round/straight stays. trying to crimp for chain ring will shorten the side the work was done and ruin the frame.
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Old 01-03-12, 05:43 PM   #7
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Well, I did it... I used basically the method that Tuz suggested- a vise with a short little torpedo of steel. It worked a charm- it didn't even mar the paint, and added about a quarter inch of clearance to each side of the tires. It did make the chainstays pull together as Frank said it would, but I was planning on cold-setting the frame from 126 to 130 anyway- I just had to cold set it a little more.

I don't think I'd try it if the chainstays were chrome-moly.
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Old 01-06-12, 04:20 AM   #8
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Quote:
Originally Posted by cycle_maven View Post
Well, I did it... I used basically the method that Tuz suggested- a vise with a short little torpedo of steel. It worked a charm- it didn't even mar the paint, and added about a quarter inch of clearance to each side of the tires. It did make the chainstays pull together as Frank said it would, but I was planning on cold-setting the frame from 126 to 130 anyway- I just had to cold set it a little more.

I don't think I'd try it if the chainstays were chrome-moly.
Frames with TIG welded bridges survive that treatment pretty well. Brazed joints, unless lugged don't like that type of load. Congrats!
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