Found these...pretty nice.
*edit...The sticky has two listed in it...the miata one is great...
The one I found
This one is more sophisticated allotting for not only rim width but even off set. It is set for stock steels vs stock alloys
(btw 240sx stock alloys are 205/60 15 6 rim width 40 offset)
This one gives a LOT of numbers for you...really cool
little hint for the second. First three numbers are the tire size you will find on your sidewall.
It will then show two half circles to the right of a picture of the tire/rim from head on...the pic to the right (half circles) are looking at the tire from the side. Then sorta connected is the tire you are comparing it too.
On the offset the first of the three is the rim size (should default to whatever you entered on the tire size) followed by the rim diameter followed by the offset.
So you'll have to know those numbers
*edit...The sticky has two listed in it...the miata one is great...
The one I found
This one is more sophisticated allotting for not only rim width but even off set. It is set for stock steels vs stock alloys
(btw 240sx stock alloys are 205/60 15 6 rim width 40 offset)
This one gives a LOT of numbers for you...really cool
little hint for the second. First three numbers are the tire size you will find on your sidewall.
It will then show two half circles to the right of a picture of the tire/rim from head on...the pic to the right (half circles) are looking at the tire from the side. Then sorta connected is the tire you are comparing it too.
On the offset the first of the three is the rim size (should default to whatever you entered on the tire size) followed by the rim diameter followed by the offset.
So you'll have to know those numbers
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