milling down 22.5 alcoas

Well it still should be a prescision cut, not like a grinder or anything. Needs to be done on a mill, lathe, or a CNC VMC.

The bead of a 22.5 is very thick. And it is like a taper rather than haveing a bead that the tire accually sits in. If you run a 22.5 with no air it will come off the wheel. The only thing holding it to the lip of the wheel is the air inside of it. A 22 or any other wheel that is built in an even size has a bead with a small rise that holds the tires to the wheel. When they machine these wheels, they only take a .25 out of the bead area, and if they are good they will leave a small rise on the inside of where the tire mounts to the wheel. If you have ever seen a 22.5 bead and a 22 bead. You would understand why it is so dangerous to put a 22 inch tire on a 22.5 wheel without being machined. And there is no such thing as a low profile 22.5 tire. ......Thats all

Originally posted by slammedfool



im just curious, so dont attack me,lol, whats the big deal about stretching a 22 over the 22.5? just a pain or flat out unsafe? ive seen a few duallys running the steel wheels with them stretched over, but from what i heard you cant mill down the steel wheels.

Its very very unsafe. The bead of a 22" tire will not seat properly on a 22.5" wheel. While it may hold air and look fine to the eye, it is not. Doing so can cause the bead to unseat with explosive force.

Its not that the bead will unseat. The steel in the bead of the tire will accually break. At that point.....you are fuked. There is no reall question to why it doesnt work.....It is a 22.5 wheel with a 22 inch tire. The tire needs to fit the rim as it was intended.

Originally posted by UnusualFabrication



Any machinist should be able to do it. Most shops probably don't want anything to do with it because of liability reasons.

You hit the nail on the head. We have a guy locally that will do it at his own shop...but every other shop in town wont touch them for liability issues.(even when we offered to type up a waiver for them)

I just dont see why people get mad cause others wont tell them how to machine them. The way I see it, the majority of the guys that know how to do it, make a living that way. So, if they tell you how to do it, thats taking money from themselves. Granted their are a few that I think have done their wheels themselves.......most just have TWAT or someone do them.