Lot's of folks say that. I won't argue. It works IF everything is done right. If you use a high quality spacer. If you maintain things the way you should.Nothing wrong with using wheel spacers providing they pilot correctly (hub concentric) on the axle flange and wheel... Use of proper length lug bolts must be considered too.
In general, the centerline of the wheel is more or less in vertical alignment with the centerline of the wheel or hub bearing. On most vehicles the front wheel centerline is inboard of the point at which the steering axis intersects the road surface. This is so the reaction to the additional drag of a low tire will counteract the tendency to pull to the side with the low tire. The forces are supposed to offset each other. More or less. There are always exceptions.Ok, just trying to learn something here. Maybe the information is right there in front of me and I'm missing it. Does this diagram say that the hub faces are stock 29 offset in the front and -1 in the rear? I understand the center line in the front wants to be in the center of the turning point but what makes the center-line in the rear? By these numbers I would be unavoidably 4mm off in the front with a wheel offset of 25 and no shim, and need a 23mm shim in the rear? But to my thinking the rear can go to whatever fits and looks good being that these don't turn. Would this be correct?
As far as spacers not being safe, BS. If you have never used spacers, you aren't qualified to comment on the safety, internet experts, SMH.
It's always better to use correct wheels/parts. However, this is about a 450, not imported into the US and has almost 0 aftermarket support. Wheels for a 450 are rare and expensive. The 451 wheels are plentiful (in comparison) and much cheaper. They fit as long as you use spacers in the rear. The OP is experiencing one of the problems all 450 owners get. We make do with what we can. If all the OP had to do was run down to Pep Boys and buy some wheels, I'm sure he would happily.However I still consider them a Band-aid. It's always better to have the proper wheel in my opinion. Especially when you consider that high quality spacers can get very close to the price of middle of the road wheels.