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Old 10-08-2009, 08:11 PM
pedro5189 pedro5189 is offline
Motorized Bicycle Senior Member
Join Date: Jan 2008
Location: England
Posts: 81
Default Re: Bending a 4130 chromoly frame with heat question

Originally Posted by DOC BOLM View Post
I would cut a 2x4 the length you want to spread the rear end and wedge it in with a hammer.Leave it in and heat your side rails just the steel changes color,then bend them.Use a magic marker and ruler to set up your bends and heat on your marks.H.D
so do you mean have the frame already pried appart and then heat at the bend points?

i have a bit of stud bar that i cut to length with nuts to go inside and outside of both the rear dropouts, would you recommed i pri the frame to point half way between these two sizes (122.5mm) then heat one side, allow to cool then up the size to 135mm and heat the other side?
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