325/30-19 vs 345/30-19 width?
10-31-2012, 11:06 PM
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325/30-19 vs 345/30-19 width? Im running a 19''/12" rear wheel now, my plans are going to a 19"/13" rear wheel, Im wanting to run the widest rear tire that I can. I have been reading on different fourms that the 325/30-19 tire is wider and not as tall as the 345/30-19, The 345/30-19 is taller and more nerrow, I know different brands of tires the sizes of the tire will be different. Is the 325 wider with all the brands?
I got this pic from a Corvette fourm!
notice that this 325/30-19 Michellin Pilot Sport Cup is wider and not as tall as the 345/30 Invos!
the left is the 345/30-19 and the right is a 325/30-19
I got this pic from a Corvette fourm!
notice that this 325/30-19 Michellin Pilot Sport Cup is wider and not as tall as the 345/30 Invos!
the left is the 345/30-19 and the right is a 325/30-19
11-01-2012, 11:25 AM
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The 345 will be wider in all brands than a 325 when comparing the same brand. 325mm wide vs 345mm wide. When you compare brand to brand then you will have some differences.
11-01-2012, 12:32 PM
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Thanks, thats what I was thinking, it just had to be brand A vs brand B the size will varry. .I have notice over the years with smaller tires will do the same, I have never ran 325s or 345s so I was'nt sure because other fourm that I found that pic on was throwing me off.
11-01-2012, 09:08 PM
#7
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Nittos are probably the most notorious brand for running small. While I've seen some Michelin's run on the bigger end, not sure if the Pilot Sport's do though...this would explain why the 345 is smaller than the 325.
As far as being taller, the sidewall number (30 in this instance) isn't a standard unit of measure like the 325/345 is (those are millimeters btw) but is actually an aspect ratio of the width. In this case the 30 in the 345 tire is 30% of the 345mms. Same goes for the 30 in the 325 tire, the sidewall is 30% of 325mms.
So of course 30% of the 345 is more than 30% of 325 and that gives you more sidewall all around and accounts for the physically taller tire.
If you had a 345/30/19 and a 325/35/19 tire, they would be much closer in physical height.
As far as being taller, the sidewall number (30 in this instance) isn't a standard unit of measure like the 325/345 is (those are millimeters btw) but is actually an aspect ratio of the width. In this case the 30 in the 345 tire is 30% of the 345mms. Same goes for the 30 in the 325 tire, the sidewall is 30% of 325mms.
So of course 30% of the 345 is more than 30% of 325 and that gives you more sidewall all around and accounts for the physically taller tire.
If you had a 345/30/19 and a 325/35/19 tire, they would be much closer in physical height.
