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Old 04-09-2021, 09:05 AM   #1530
6DoF
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Join Date: Nov 2014
Location: somewhere, PA
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Re: A '54 named Busty

yeah, i hate metric tire sizing ... why do they feel the need to involve math in the listing, just tell me the actual dia! is your confusion in the metric size conversion, or picking a new tire?

for anyone wondering: 245/60-15 calc's

section width:
245mm ... 1in=25.4mm ... 245/25.4=9.65"

tire dia:
the 60 is the ratio of sidewall to width, or 60% of it. so 245*0.6=147. but! there is a sidewall both above and below the wheel so ya gota x2 it. so 147*2=294 but this is still only the rubber part of the dia, still need to convert to inches so you can add the wheel to it. 294/25.4=11.57 ... 11.57+15=26.57"

245/60-15 = 26.6x9.7-15 (US labels would round this to a 27x10-15 cuz marketing)

as for selection of a new tire size, if you are only just rubbing at full lock, i'd make very small changes. 1/2" smaller dia and 1/4" narrower would most likely do a lot. also, if you dial into the actual tire specs to see the actual thread width, you might be able to find a tire with a narrower tread and the same section. meaning it's more rounded vs square'd. that alone might get ya there.

clear as mud? any chance i was able to give that mosquito another eye? no, forget that, kill all mosquito's!!
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