tires......not too good with the metric sizeing

hoorders · July 29, 2005

Hey everyone,

Ok, O gotta say that metric tire size is just one of those things I cant get my head around.

My 2000 silverado 1500 4x4 has I think, 275 70r 16's on it. I am going to need some new tires shortly and would like to put a taller tire on it without increasing the width very much and I want to keep my factory rims

Anyone have any suggestions on what size I should be looking at. And will I have any rubbing problems with a taller tire?

If someone had a pic of what im looking for that would be great to see it on a truck.....

ADDZ71 · July 29, 2005

Here goes. The first number is the tread width in millimeters. The second number is called the aspect ratio in your case it represents that the sidewall height is 70% of the tread width 275 * 70% = 192.5 mm. The last number which you know is the wheel diameter for the tire.

So if you want a taller tire with the same width you would want a higher aspect ratio 75% or 85% rather than 70%. From a width perspective most guys on here have been able to fit 285/75/16 with little to no modification to there 1500's.

Conversion wise your current tire is 10.83 inches wide and total height is 31.16 inches. If you went to a 285/75/16 you would then have a tire that is 11.22 inches wide an increase of a little less than a half an inch and would now be 32.83 inches tall an increase of 1.7 inches.

As someone else is bound to add these changes will also affect your odometer/speedometer reading.

hoorders · July 29, 2005

Here goes. The first number is the tread width in millimeters. The second number is called the aspect ratio in your case it represents that the sidewall height is 70% of the tread width 275 * 70% = 192.5 mm. The last number which you know is the wheel diameter for the tire.

So if you want a taller tire with the same width you would want a higher aspect ratio 75% or 85% rather than 70%. From a width perspective most guys on here have been able to fit 285/75/16 with little to no modification to there 1500's.

Conversion wise your current tire is 10.83 inches wide and total height is 31.16 inches. If you went to a 285/75/16 you would then have a tire that is 11.22 inches wide an increase of a little less than a half an inch and would now be 32.83 inches tall an increase of 1.7 inches.

As someone else is bound to add these changes will also affect your odometer/speedometer reading.

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Thanks for getting back to me................so if I were to find lets say a 275/75/16, then this would be a taller tire but not wider?

ADDZ71 · July 29, 2005

Correct

mudbug660 · July 29, 2005

Alot of people have a hard time understanding that sort of stuff. It's even harder to explain it to people, especially when there's no calculator around to give examples. I've used this knowledge hundreds of time. It's very helpful. And ADDZ71 did a great job of explaining it. Right on the money.

hoorders · July 29, 2005

Alot of people have a hard time understanding that sort of stuff. It's even harder to explain it to people, especially when there's no calculator around to give examples. I've used this knowledge hundreds of time. It's very helpful. And ADDZ71 did a great job of explaining it. Right on the money.

<{POST_SNAPBACK}>

Absolutly.................it actually made perfect sense they way it was explained to me.............now, im pretty mechanically inclined, but I think anyone would have understood that explaination.

Thanks everyone!!!!

July 29, 2005

Here goes. The first number is the tread width in millimeters. The second number is called the aspect ratio in your case it represents that the sidewall height is 70% of the tread width 275 * 70% = 192.5 mm. The last number which you know is the wheel diameter for the tire.

So if you want a taller tire with the same width you would want a higher aspect ratio 75% or 85% rather than 70%. From a width perspective most guys on here have been able to fit 285/75/16 with little to no modification to there 1500's.

Conversion wise your current tire is 10.83 inches wide and total height is 31.16 inches. If you went to a 285/75/16 you would then have a tire that is 11.22 inches wide an increase of a little less than a half an inch and would now be 32.83 inches tall an increase of 1.7 inches.

As someone else is bound to add these changes will also affect your odometer/speedometer reading.

<{POST_SNAPBACK}>