whats it mean
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Joined: Feb 2009
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From: Andrews A.F.B., MD
whats it mean
i did a search and too many post with the words popped up but none with an explaination of what it means.
What does everyone mean when they say backspacing?
i hear these terms when people talk about lifted trucks
Backspacing / offset / application
i know 35 is tire size 12.5 is width i think but what is the 3rd number?
35x12.5x9 for example
whats it all mean?
What does everyone mean when they say backspacing?
i hear these terms when people talk about lifted trucks
Backspacing / offset / application
i know 35 is tire size 12.5 is width i think but what is the 3rd number?
35x12.5x9 for example
whats it all mean?
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Joined: Jul 2008
Posts: 964
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From: Chicago IL
okay the last number on the tire markings is the wheel size, my tires are 37X13.50XR20 i have 20" wheels so hence the R20.
backspacing.
okay backspacing. it is the distance from the inner lip of the wheel to where your mounting surface is.
hers an example.
your wheel is say 10" wide. take your wheel and look at it so the outside ( the part that people will see) is facing away from you, from that inside lip all the way to the mounting sureface ( where it will push up against the hub) is your backspacing.
and easy way to measure it is say you lay the wheel face down, take a straight edge and lay it along the inner lip, then take a ruler and stand it up on the flat hub meeting surface. the measure ment from the flat surface to your striaght edge is your backspacing.
the smaller the number the farther the wheel will stick out, if you have 4.5" of backspacing the mating surface of the wheel will be 4.5" from the inner lip. a wheel with 6" of backspacing the mating surface will be 6" away from the inner lip therefore making the wheel tuck into the wheel well a little more.
heres a link to a site that explains it.
http://www.getahelmet.com/jeeps/tech/backspace/
backspacing.
okay backspacing. it is the distance from the inner lip of the wheel to where your mounting surface is.
hers an example.
your wheel is say 10" wide. take your wheel and look at it so the outside ( the part that people will see) is facing away from you, from that inside lip all the way to the mounting sureface ( where it will push up against the hub) is your backspacing.
and easy way to measure it is say you lay the wheel face down, take a straight edge and lay it along the inner lip, then take a ruler and stand it up on the flat hub meeting surface. the measure ment from the flat surface to your striaght edge is your backspacing.
the smaller the number the farther the wheel will stick out, if you have 4.5" of backspacing the mating surface of the wheel will be 4.5" from the inner lip. a wheel with 6" of backspacing the mating surface will be 6" away from the inner lip therefore making the wheel tuck into the wheel well a little more.
heres a link to a site that explains it.
http://www.getahelmet.com/jeeps/tech/backspace/
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Joined: Jul 2008
Posts: 964
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From: Chicago IL
and i dont beleive there is a such tire that is made in a 35X12.50X9. i dont know of any 9" wheels out there.
and you cant run any smaller than a 17" wheel on these trucks due to brakes and you cannot use the stock wheels on a 6" ift because they dont have anough backspacing they will rub against the knuckle.
and you cant run any smaller than a 17" wheel on these trucks due to brakes and you cannot use the stock wheels on a 6" ift because they dont have anough backspacing they will rub against the knuckle.
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From: Andrews A.F.B., MD
and i dont beleive there is a such tire that is made in a 35X12.50X9. i dont know of any 9" wheels out there.
and you cant run any smaller than a 17" wheel on these trucks due to brakes and you cannot use the stock wheels on a 6" ift because they dont have anough backspacing they will rub against the knuckle.
and you cant run any smaller than a 17" wheel on these trucks due to brakes and you cannot use the stock wheels on a 6" ift because they dont have anough backspacing they will rub against the knuckle.
