welding rims?

Ok this is for you guys that weld a big rim to a small rim how do you get the small one centered in the big one

Are you able to put a metal bar through the center holes, kinda 1 wheel on top of the other and then weld it.

Depending how the back of the larger rim is and how well the smaller rim will sit on it - the smaller rim might need to be trimmed to fit flush - best bet is to mesure from the smaller rim edge to the larger rim edge and make sure its the same all the way around .

Another way to make sure its centered is to make a jig from some wood ( easier to build) - a dowel down the center of the small rim, then a block bolted to the larger rim - slide the dowel into a hole in the larger block that is centered in the larger wheel's hub.


Id tack weld the smaller rim and make sure its centered before fully welding....

Thank you. What i plan on doing is welding front mower rims to a car donut spare to level out the old merry. i am tired of always going down hill

i found two T117/70D14 that are shaped just wright. im going to drill the bolt pattern in the rim and bolt them together.

i will post pics