Quote:
Originally Posted by Starz26
Quote:
Originally Posted by Pray for Mojo
8" is the minimum width for 245s, the 8.5" would be fine for that size. Offset of the wheel is the most important, make sure you're buying something with roughly the same ET as your factory wheels.
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Thanks.
So an offset of 32 would be Ok? I see so many ranges here and think the consensus was around 35...
As an aside where is a good place to learn about this stuff. Sizes, what would, would not work etc. I prefer to understand things more than I feel I do now so a link to a great resource for learning would be nice. (not a calculator, but educational info).
Tireracks mfg methods also seem to be confusing or using different language to make the whole thing muddy. Is flow-forming the same as rim-forming? It also says it is low pressure gravity case/flow forming. So is that decent quality? Forged or multi-piece is a bit much I think for winter only rims I suspect. |
For a 8.5" rim an offset of 32 closer to the factory option, which is 30.
I made this table of what BMW offers:
7JX18 ET:22 (225/60R18)
7,5JX19 ET:32 (245/55R19)
8x20 ET27 (245/45R20)
9,5x20 ET43 (275/40R20)
8,5x21 ET30 (245/40R21)
9,5x21 ET43 (275/35R21)
The rims are more narrow than most aftermarket options. More narrow rims need to carry higher load on smaller surface area, and can be protected more my the tire, for curb scratches.
Some of the "will it fit" calculators contains good help. Just put in the 8.5x21 rim data from above to compare with the option you are looking at.
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