Anyone ever added a bolt pattern to a set of aluminum rims?

I have what I was told was 5 x 4 3/4 pattern USA made aluminum 15 x 10 rims. Turns out they are actually 5 x 4 1/2 pattern. How hard is it to drill a new pattern or should I just find a set with the correct one I need?

Most important question is do you have the tools / tooling to accurately add the set of holes?

I'd think for most folks, it would be better to find the set you need.

Too risky, it's best to get the correct wheels and do it right, especially with aluminum wheels.

Once upon a time long, long ago----we had a new sponser who supplied us some wheels----bolt pattern was off----------took the wheels to Halibrand----they mounted them on a centering fixture-indicated center under milling machine head, offset them 50% of desired bolt circle, drilled firsr hole, rotated with the degreeed fixture 72*, drilled #2, etc, etc-------both wheels took probably 2-3 hours total in Halibrand shop---------Ran the wheels a couple runs with tire shake, they collapsed(spun alum disc type)--------bought more Halibrands!!!!!!!!!!!!!!

Any good machine shop should not have a problem.
You have plenty of room and centering them should not be even a basic problem.

I had Hummer wheels drilled for a one ton Ford pattern and worked great on
my Centurion. Have had new pattern installed on Mercedes for Lincoln, again great results. Just be sure it is a professional shop, probably better if not an automotive shop.

I would think it easier to redrill the axles

Curious, if you redrill your wheels how do you plan to cover the unused holes?

OK--now I'll give you the method I'd use today---------get an whell adapter /spacer plate for the 4.5/4.75 -----use it as a guide plate and set up with one hole with a drill bushing for the pilot hole and another for a bigger, then another for finish size--------just bolt in place, drill one pilot hole, rotate to next position drill bigger hole plus pilot hole in next position, rotate again and pilot hole, bigger hole, And finish size--rotate another position and go again--------

I would suggest the hole being a little undersize so you could use a reamer to finish size.

If it was me, I would get different wheels.