Thread: Best Alloys
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      10-30-2018, 03:59 PM   #20
FBMWWINS
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Drives: M8C Coupé & M240i Coupé
Join Date: Nov 2011
Location: Europe

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Yes Havy that is what I was thinking regarding tire size - keep it original at 245 front and 275 rear while using 4x 9.5 size front M433 wheels. 275 rear is plenty in my opinion car looks nice and decent and for a 650 I think just about right.

This is what I got when calculating OEM size vs. 4x M433 9.5 ET 31 wheels on a site:

FRONT:

SUSPENSION: Rim is 11 mm closer to suspension components. Acceptable for most cars

FENDERS: Tire will stick out 2 mm farther. Rim will stick out 15 mm farther. Acceptable for most cars

WHEELWELLS: same

BRAKES: 100% clear (leaves even more room than OE)

SCRUB RADIUS: Positive scrub radius (about 2 mm). Almost no difference. Please be aware that calculated value is approximate.



REAR:

SUSPENSION: 100% clear (leaves even more room than OE)

FENDERS: Tire will stick out 13 mm farther. Rim will stick out 19 mm farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset

WHEELWELLS: same

BRAKES: 100% clear (leaves even more room than OE)

SCRUB RADIUS: Positive scrub radius (about 13 mm). Scrub radius will be changed by 13 mm, this may affect the car's handling. Please check manufacturer recommendations. Please be aware that calculated value is approximate.


Thus the only "greater" variation remains the positive scrub radius of 13 mm extra on the rear axle. The other variables are very acceptable. Still is 13mm positive scrub radius cause for concern?
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