Comments on: Elongation of Rockabilly Boogie and Other 1 & 3 Speed Bikes http://www.pleasantrevolution.net/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/ tools, soundrack, thoughts, and images for a pleasant revolution Fri, 21 Nov 2008 19:01:07 +0000 http://wordpress.org/?v=2.6 By: Rider http://www.pleasantrevolution.net/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-170 Rider Fri, 28 Apr 2006 15:08:28 +0000 http://www18.a2hosting.com/~pleasant/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-170 The problem comes (so I'm told) with frames that have been heat treated after welding. Early Cannondale frames were done this way. Heating the frames to bend the stays caused problems with the strength of the aluminum. Now, I don't know any of this for a fact. But I have been told all of this by folks a lot more knowledgeable than me. Also, with the OK of my Cannondale dealer I ran 130mm hubs in an early model Cannondale that came with 126mm spacing. The fit was only a tiny bit snug and I had no problems at all over thousands of miles. I did not bend the stays at all; they had enough "spring" to accomodate the extra 2mm on each side. Good luck with the conversion. The problem comes (so I’m told) with frames that have been heat treated after welding. Early Cannondale frames were done this way. Heating the frames to bend the stays caused problems with the strength of the aluminum. Now, I don’t know any of this for a fact. But I have been told all of this by folks a lot more knowledgeable than me.
Also, with the OK of my Cannondale dealer I ran 130mm hubs in an early model Cannondale that came with 126mm spacing. The fit was only a tiny bit snug and I had no problems at all over thousands of miles. I did not bend the stays at all; they had enough “spring” to accomodate the extra 2mm on each side. Good luck with the conversion.

]]> By: tricky coyote http://www.pleasantrevolution.net/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-169 tricky coyote Wed, 26 Apr 2006 19:22:13 +0000 http://www18.a2hosting.com/~pleasant/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-169 Hey Rider, I'm glad you bring this up. I heard that once, too. Our local bike shop heats up the aluminum frames before spreading. I just went ahead and did it on the Rockabilly, even though it's aluminum, without heating. It seems like such a minimal amount of spreading, but it's the reason why I knew I didn't want to spread it too far and then have to spread it back. I'd be way more concerned about it if it was somewhere in the front of the bike where failure would be likely to cause a crash. With the minimal bending I don't think it will fail, and I really don't think I'd lose control if it did, "it" being a chainstay cracking. If someone out there knows more about this subject, I'd love to hear. Hey Rider,

I’m glad you bring this up. I heard that once, too. Our local bike shop heats up the aluminum frames before spreading. I just went ahead and did it on the Rockabilly, even though it’s aluminum, without heating. It seems like such a minimal amount of spreading, but it’s the reason why I knew I didn’t want to spread it too far and then have to spread it back. I’d be way more concerned about it if it was somewhere in the front of the bike where failure would be likely to cause a crash. With the minimal bending I don’t think it will fail, and I really don’t think I’d lose control if it did, “it” being a chainstay cracking. If someone out there knows more about this subject, I’d love to hear.

]]> By: Rider http://www.pleasantrevolution.net/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-168 Rider Wed, 26 Apr 2006 18:15:23 +0000 http://www18.a2hosting.com/~pleasant/2006/04/25/elongation-of-rockabilly-boogie-and-other-1-3-speed-bikes/#comment-168 It's not a good ideal to try and spread the chainstays on an aluminum or carbon fiber frame. Steel, though is fine. I like your technique; it's well thought out. It’s not a good ideal to try and spread the chainstays on an aluminum or carbon fiber frame. Steel, though is fine. I like your technique; it’s well thought out.

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