Make: Audi, BMW
Models: A4, E30 M3, E36

Wheel Fitment

Much data has been collected about fitting aftermarket wheels onto E30 and E36 cars in larger sizes and in larger widths.  Additionally, there are many Java tire calculators on the web as well, but this will serve to summarize what fits on specific cars.  These represent the largest, and best tire size that will keep your speedometer accurate.  For sizes in stock sizes, these represent the largest tire that will fit on the stock rims.  If you have additions to this list, please feel free to email it to us.

Car Model 15" Tire 16" Tire 17" Tire 18" Tire Special Notes
Audi A4   225/50 225/45 225/40 ET35 on 17" rim fills out rear fenders nicely.  Most 18" come with 8.5" width, making the 225/40 tire a little small.
Audi S4   n/a 225/45 225/40 A 235/40 will fit on the factory 17x7.5 rim.  BBS makes a 18x8.
BMW E30 M3 225/50 225/45 235/40   225/45R16 is strange size tire.  Late model E36 factory 17" rims may be used in conjunction with 15mm spacers and lug bolts.
BMW E36     234/40   Factory 17x7.5 rims are best offset.  May require steering bump limiter added for full lock turns.
BMW E36 M3  n/a n/a 235/40 f
255/40 r
235/35 Cars later than '96 may experience ASC+T problems when deviating from stock tire sizes.  Your results may vary.
BMW M Coupe/
Roadster
n/a n/a 235/40 f
255/40 r
   

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