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      05-09-2018, 04:17 PM   #53
Aus335iguy
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Drives: 2009 e92 335i MSport DCT
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2009 BMW 335i  [5.00]
Quote:
Originally Posted by Rajvosa View Post
Quote:
Originally Posted by asn993 View Post
cheers thanks. the problem I have is not knowing exactly what ET I need when retaining the original hubs so I guess I will have to wait and get it all measured up. VMR also have some nice wheels and as I am trying to stick to the 9' & 10" originals many of the wheels available are only 8.5" and 9.5" which again will impact the offset.
Can you not fit 1M wheels onto original hubs??
As for offset , you are running 1M body, so whatever they run you can do too , no?
By looking at the charts in that link the standard wheels are very different
E82 135i F 18x7.5 ET49
R 18x8.5 ET52
E82 1M F 19x9.0 ET31
R 19x10 ET25

The 1M has a lower offset by about 27mm in the rear and 18mm in the front
A lower number means wheels stick out more.

The wheels are wider as well though so maybe the hubs are slightly different

If you assume that both cars locate the inside edge of their respective tyres to achieve the same clearance from the strut/suspension
You can workout the offset difference you'll need.
Start with the difference in width of stock wheels It is 1.5 inches on the front and rear which is 37mm
Half of that goes toward the inside of the wheel. So 18.5mm
For front
49-18.5 = 31 which happens to be the same offset as the stock 1M wheels
For rear
52-18.5=33.5 which is 8mm difference from 1M

That means you should be able to use stock 1M wheels on the front and stock on the back with an 8mm spacer.....

Ive made a number of assumptions any of which might be incorrect here so dont quote me please do your own research!!
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