Wheel size for tires??
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From: San Diego
Wheel size for tires??
I know that I should already know this but...I have 37 x 12.50 R 17 LT tires, what size wheel do those fit on? I know they are 17" diameter but what width do I need? 12.50 is a ratio right? so how do you figure wheel width? thanks!
Post Fiend
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From: 21791
it is L/W/rim diameter
your tire is 37" tall, 12.5" wide, and fits a 17" rim. for a tire that wide i would think a 8 or 9 inch rim would suffice.
metric tire sizes are a bit harder to understand, but i can tell ya if you need.
your tire is 37" tall, 12.5" wide, and fits a 17" rim. for a tire that wide i would think a 8 or 9 inch rim would suffice.
metric tire sizes are a bit harder to understand, but i can tell ya if you need.
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From: San Diego
Originally Posted by strokin_it7.3
it is L/W/rim diameter
your tire is 37" tall, 12.5" wide, and fits a 17" rim. for a tire that wide i would think a 8 or 9 inch rim would suffice.
metric tire sizes are a bit harder to understand, but i can tell ya if you need.
your tire is 37" tall, 12.5" wide, and fits a 17" rim. for a tire that wide i would think a 8 or 9 inch rim would suffice.
metric tire sizes are a bit harder to understand, but i can tell ya if you need.
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From: round rock, tx
Originally Posted by MIKESANDS
I know that I should already know this but...I have 37 x 12.50 R 17 LT tires, what size wheel do those fit on? I know they are 17" diameter but what width do I need? 12.50 is a ratio right? so how do you figure wheel width? thanks!
pics?
i am running 315/70R17 BFG AT KO's on 17x9 ProComp Extreme Alloy rims
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From: San Diego
Originally Posted by toyota hauler
what brand of tire?
pics?
i am running 315/70R17 BFG AT KO's on 17x9 ProComp Extreme Alloy rims
pics?
i am running 315/70R17 BFG AT KO's on 17x9 ProComp Extreme Alloy rims
Cargo Master
Joined: Apr 2006
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From: Concord NC
correct me if I am wrong but I think a 315 is just about the same as 35 12.5 if so mine are on 9 3/4 rims
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Post Fiend
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From: 21791
a 315/75r16 tire is 12.5 inches wide (12.4 to be exact if you do the calculations) and is 34.6" tall.
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Originally Posted by MIKESANDS
BF Goodrich...ok, so what about the 315/70R17 say's 9" wide rim? how do you figure that out?
70 is the ratio of the tread width and the tirewall height
and 17 is the wheel diameter.
So I am able to see that this has a tread width of 315mm = 12.4 inches, and a tire with a width of 12.4 inches can go on a 8 or 9 inch wide rim.
When you start to get into tires that have a tread width of 14.5 inches you should be using a rim with a width of 10 inches.
315 mm * 70% = 220.5 mm = 8.68 inches of tire wall height.
So to get total tire height it is rim diameter plus (2 * tire wall height)
17 + (2 * 8.68) = 34.36 inches
Last edited by matt21418; Aug 2, 2006 at 09:44 PM.
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From: San Diego
Originally Posted by matt21418
315 refers to the width of the tread in mm
70 is the ratio of the tread width and the tirewall height
and 17 is the wheel diameter.
So I am able to see that this has a tread width of 315mm = 12.4 inches, and a tire with a width of 12.4 inches can go on a 8 or 9 inch wid rim.
When you start to get into tires that have a tread width of 14.5 inches you should be using a rim with a width of 10 inches.
70 is the ratio of the tread width and the tirewall height
and 17 is the wheel diameter.
So I am able to see that this has a tread width of 315mm = 12.4 inches, and a tire with a width of 12.4 inches can go on a 8 or 9 inch wid rim.
When you start to get into tires that have a tread width of 14.5 inches you should be using a rim with a width of 10 inches.
Post Fiend
Joined: Jul 2005
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From: 21791
yep, the first number is in millimeters. divide that by 25.4 to convert it to inches.
the second number is a %age of the first number. so, .7*315= 220.5 220.5/25.4= 8.68. this is the amount of sidewall. multiply by two to get two sidewalls, (17.36) and then add the wheel diameter (17) and you have a 34.5" tire.
the second number is a %age of the first number. so, .7*315= 220.5 220.5/25.4= 8.68. this is the amount of sidewall. multiply by two to get two sidewalls, (17.36) and then add the wheel diameter (17) and you have a 34.5" tire.