Originally Posted by
shelbyfv
Thanks for the links. Definitely seen some cool bikes there. But no disc or 700c conversions, so I am maybe encroaching on some more rare ground with this project.
Originally Posted by
msu2001la
This looks like a cool project. I'm curious about the "disc conversion" aspect. I was always under the impression that even if you could weld mounts onto a frame to accommodate discs, that because the frame wasn't designed to withstand brake force at those points, it was a bad idea? Just wondering if this holds true, or if you've done anything else to this frame/fork to make it work differently with discs?
As for wheel size, I'd definitely agree that 700c is a better choice if your end goal is to make this into an "aggressive road bike". The BB is going to be very high though.
Well with these 90's GT Triple Triangle frames, there are a lot of ppl that have converted the rear brake with a simple brake adapter which you can see
here. From what I hear, the rear drop out and seat-stays are girthy enough to handle the extra force. The front brake exerts more force onto the fork, so it is suggested to get a disc specific fork or to reinforce the fork with some added steel. This is also typically done for the rear brake conversions, but this frame is aluminum, so any after-market welding is a no-go. I looked extensively into that topic and what I heard from bike builders is that the aluminum warps slightly from the welding so you'd need to set it somehow to keep it in its stock form. After that you'd also have to heat treat the aluminum again. The bike builder with whom which I spoke, said that this kind of stuff can basically only be done by the original manufacturer. Heat treating can be done by anyone, but keeping the frame from warping, or setting it was the hard part as far as I understood.