im wondering what exactly the 3 #s mean when you see tires advertised (ex. 225/40/18)?? im pretty new to the car scene, so any help would be greatly appreciated!
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tires explanation please!
im wondering what exactly the 3 #s mean when you see tires advertised (ex. 225/40/18)?? im pretty new to the car scene, so any help would be greatly appreciated!
Banned
225/40/18
225= the width of the tire in mm
40= the sidewall height in % of the width (so 40% of 225mm)
18= rim size
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and thats in inches....Originally posted by ogpog
18= rim size
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often you can find a speed rating as well that is represented in Letter form (ie. s, t, h, v, z)
http://autorepair.about.com/cs/gener...bldef_760a.htm
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oh, I learned something new. I always thought that the second number was the sidewall height in mm.Originally posted by ogpog
225/40/18
225= the width of the tire in mm
40= the sidewall height in % of the width (so 40% of 225mm)
18= rim size
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are you sure thats right?Originally posted by ogpog
225/40/18
40= the sidewall height in % of the width (so 40% of 225mm)
Because 40% of 225 is 90 which is hella big for a sidewall.
I may be completely wrong so dont quote me but it just seems a little big where as 40mm seems more correct.
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im with you on this one ... i think the second number is sidewall height in mmOriginally posted by Sharpie
are you sure thats right?
Because 40% of 225 is 90 which is hella big for a sidewall.
I may be completely wrong so dont quote me but it just seems a little big where as 40mm seems more correct.
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no it is a percentile, go and google itOriginally posted by 92Mx-3
im with you on this one ... i think the second number is sidewall height in mm
Last edited by The Cosworth; 01-24-2007 at 08:19 PM.
Cos...
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http://en.wikipedia.org/wiki/Tire_code
Guess you're right.When referring to the purely geometrical data, a shortened form of the full notation is used. To take a common example, 195/55R16 would mean that the width of the tire is 195 mm at the widest point, the height of the side-wall of the tire is 55% of the width (107 mm in this example) and that the tire fits 16 inch diameter wheels.
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40 is the aspect ratio for the side wall height it is the realationship
between the tire hieght and the tire width is is aproximately 40% of the tires width
just as an example if you look at a tire for a truck say p245/75r16 and you say that the 75 is mm's you are saying that the tire is 7.5 cm tall side wall height where infact is around six inches.
TYLER JODOIN
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2006 scion xb(wifes new toy)
1990 jeep yj7 (mud toy)
1991 plymouth laser rs turbo(x3)
1962 ford falcon (resto)
1964 impala wagon
1974 super beetle (primer black)
and more than beyond lets me list
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It seems big but it includes the part of the tire that is under the lip of the rim.
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Senor....Google is your friend mang
http://1010tires.com/tech.asp
This should answer any wheel and tire question you have.
Ultracrepidarian
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thanks a bunch guys! I appreciate all the help
Banned
No worries
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