for frame tubeing, what wall thickness is recomended?
A. for backbone tubing your going to want something stronger than 1/16th like the stock one was made of. If you look at alot of the aftermarket frames the backbone and seat post tube (if it is a single seat post) are really thick wall. I use 1/8th inch thick tubing for downtubes. 1 1/8th OD with a 1/8th tubing thickness. its heavier than the stock stuff. Q. Where I am butting two frame tubes together I have a smaller tube slid inside each section of the tubes I am joining for reinforcement. I know I should use plug welds to join that inner tube to the outer ones, what diameter hole would be appropriate for the plug welds? The tubes are 1/8″ wall. Also, how many plug welds should I use on either side of the butt joint? A. I think .250″ dia sounds like a good plan. You probably wouldn’t want to go too large, because you’d be filling in a big hole, and at some point, the center of the hole would get to be difficult to fill in. Maybe 5/16″ or so. By the time you’ve worked around the the 5/
