OK, so I'm considering upgrading the size of my tires/rims on my 2002 330xi sedan.
I have the sport package so the tires are:
• 17 x 7.0 Double Spoke (Styling 79) alloy wheels, 205/50R-17 all-season tires
If i choose to get larger tires does my speedometer need to be recallibrated? Because hypothetically, if i had tires that were 2" in height, they'd rotate MUCH more than would my current tires, and so the MPH calculations would be off, wouldn't they? So, is recallibration a necessary step?
also,
I certainly want to get larger rims/tires, and I'm considering some Hammans (PGIIs--18"). What's the weight difference on the type 79 rims and these? what about the style M68's?
thanks.
I have the sport package so the tires are:
• 17 x 7.0 Double Spoke (Styling 79) alloy wheels, 205/50R-17 all-season tires

If i choose to get larger tires does my speedometer need to be recallibrated? Because hypothetically, if i had tires that were 2" in height, they'd rotate MUCH more than would my current tires, and so the MPH calculations would be off, wouldn't they? So, is recallibration a necessary step?
also,
I certainly want to get larger rims/tires, and I'm considering some Hammans (PGIIs--18"). What's the weight difference on the type 79 rims and these? what about the style M68's?
thanks.