Originally Posted By: eljefino
Originally Posted By: Traction
Well that's part of the point. The manufacturers always changing something, and it greatly adds to the total costs. I would think I would think a few hub diameters, and wheel bolt patterns would work for everything, but no, GM had to come up with a 6 on 132mm bolt pattern, instead of something more common. Collectively, not just me, but just that one change will cost everyone millions.
Man, what's up with this? MIL has a buick Lacrosse that takes 5x120. GM used to be 5x114.3 and now they're 100, 110, 115, 120. I figure it's to sabotage swaps to older rims without TPMS, or maybe also they have some different offsets and don't want to upset their stability control with non-carefully chosen rims.
It's because they are using what they call global platforms. The Lacrosse has the same basic underpinnings as the Regal, which is actually a rebadged Opel Insignia. One of the first global cars that was an import to us was the Cadillac Catera, another Opel, and then the Pontiac GTO(Australian Holden Monaro). All these cars were 5x120 because it was the common layout in their markets.