Originally Posted by
Dan Burkhart
If the wall thickness is anything like my old Schwinn tandem, drilling and tapping works just fine.
I put 2 cages on this frame this way. The tube was thick enough for 3 complete threads, and they hold very securely.
http://cid-c5aa741102f41823.skydrive...ront%20003.jpg
I also am equipped to install Riv-nuts, and they are definately the fix for thinner tubes.
Regardless of the wall thickness. The drill is the way to go, but riv-nut is the final answer. Tapping will be hit and miss. Riv-nut on a frame that has the wall-thickness, will NEVER fail.