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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 06-30-11, 08:48 AM   #1
xXSEYCOMXx
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Drilling holes in a frame

Hi, lately I've been looking into converting my single speed dirt jumper into an 8 speed dirt jumper, and when i was looking at the frame I noticed there was no 5mm hole for the derailleur to be installed. So I was wondering if drilling a 5mm hole into the frame(so I can install the derailleur) would be a good idea. And if not, what would be the best way to attach the derailleur.

Thanks for your time,
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Old 06-30-11, 10:31 AM   #2
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Rear derailleurs are not held on with 5mm bolts. Rear derailleur hangers are threaded M10x1- but you still need a hanger.

Depending on your drop outs you may be able to use something like one of these:




Knowing what frame you have would make it easier- but in either case this is most likely not a permanent frame building fix so much as a mechanical addition.
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Old 06-30-11, 11:53 AM   #3
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The frame is from a KHS SJ-100. If that helps...
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Old 06-30-11, 03:46 PM   #4
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Quote:
Originally Posted by xXSEYCOMXx View Post
The frame is from a KHS SJ-100. If that helps...
What year? Looking at the website, the 2008 clearly shows a derailleur hanger. The 2011 may not. The frame color is throwing me off.
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Old 06-30-11, 10:00 PM   #5
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I believe it's a 2008. It is a white frame(if that helps). But there's nowhere to hang a derailleur. I think I might go with what Eric Estlund suggested. What are those pieces called(the ones in the pictures above)?
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Old 07-01-11, 06:45 AM   #6
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derailler hangers or derailler claws.
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Old 07-01-11, 08:09 AM   #7
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http://store.khsbicycles.com/derail-hanger.html

http://www.khsbicycles.com/StoreFiles/derhanger.pdf
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