Quote:
Originally Posted by S6F
Even with regular P7 tires, under inflated, I find the suspension unable to soften some of these local NJ roads. Thinking of moving from 19” to 18” with the taller side-walls. Or, possibly keeping the 19s and getting 245/45 to replace the 245/40 tires for a similar profile. Do you think that would make a significant difference? Thanks for your help.
‘19 540ixMSport
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Just posted in your other thread on same subject but... Try non-runflat 245/40/19's first. All runflats have stiff sidewalls and I found the P7's better than RFT Bridgestones I had on an F30. The 245/45/19 will give you even more speedometer error than is already built in. If you're worried about getting stranded with a flat and no spare, carry the M Mobility kit or similar from Continental (available at tirerack.com). I've done this for 15 years but never had to use it. Or buy the 5 series spare tire kit that was an option when new.