5 of back spacing??
03-09-2011, 04:01 PM
#12
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Backspace to Offset Conversion Chart
The table on the right is q quick reference for finding offset, pick the rim width and follow the row over to the backspace of your wheel.
03-09-2011, 04:03 PM
#13
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That is a +12mm offset. Same offset as the wheel I am using. With this offset your tire would probably not stick out past the fenders (or almost not).
Do you have a lift? I do not know if such tire would fit under a non lifted JK
Do you have a lift? I do not know if such tire would fit under a non lifted JK
03-09-2011, 04:08 PM
#14
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Backspacing does not mean anything without knowing the wheel width.
The formula for backspacing is: nominal width plus 1", divided by 2 (to get centerline), then add the offset (positive or negative).
4.75" backspacing on an 7.5" wheel will locate the tire under the JK at the same location of an 9" wheel with 5.5" backspacing.
The formula for backspacing is: nominal width plus 1", divided by 2 (to get centerline), then add the offset (positive or negative).
4.75" backspacing on an 7.5" wheel will locate the tire under the JK at the same location of an 9" wheel with 5.5" backspacing.
Nope,
Backspacing is the main thing. 4.75" of backspacing will be the SAME for all rim widths, just think about how you measure it. It is from the back of the rim lip to the backplane of the lug holes.
If you have a 12" rim with 4.75" backspacing it would just cause it to stick out further than the 9" rim with the same backspacing.
Now what you are refurring to is offset.
03-09-2011, 04:14 PM
#16
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Backspacing does not mean anything without knowing the wheel width.
The formula for backspacing is: nominal width plus 1", divided by 2 (to get centerline), then add the offset (positive or negative).
4.75" backspacing on an 7.5" wheel will locate the tire under the JK at the same location of an 9" wheel with 5.5" backspacing.
The formula for backspacing is: nominal width plus 1", divided by 2 (to get centerline), then add the offset (positive or negative).
4.75" backspacing on an 7.5" wheel will locate the tire under the JK at the same location of an 9" wheel with 5.5" backspacing.
03-09-2011, 04:22 PM
#17
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You will be just fine with this lift / tire / wheel combo. Still if you want the tire to stick out past the fenders, that may not be a good choice.
If you want to have a good ON-ROAD ride it is a good choice as it would not affect your scrub radius too much.
I am from St-Elzear (Beauce) and you?
If you want to have a good ON-ROAD ride it is a good choice as it would not affect your scrub radius too much.
I am from St-Elzear (Beauce) and you?
03-09-2011, 05:10 PM
#19
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If you want to calculate how far the rim is from the frame then use BS if you want to see how far out the tire extends then use Offset. The stock rims have a 44.45mm offset and a 6.25" BS
Sometimes i wonder the about accuracy of BS. For example, The rims I want are AEV Pintlers which are 17 x 8.5" and have an offset of 10mm. The AEV web site claims that the BS is approx. 4.7" however if you look at the chart someone posted previously it shows that the BS should be 5.2" for an offset of 10mm.
In the case of the AEV pintlers, i've been told when AEV calculates the BS, they don't include the width of the tire lip that holds the tire in place.
Sometimes i wonder the about accuracy of BS. For example, The rims I want are AEV Pintlers which are 17 x 8.5" and have an offset of 10mm. The AEV web site claims that the BS is approx. 4.7" however if you look at the chart someone posted previously it shows that the BS should be 5.2" for an offset of 10mm.
In the case of the AEV pintlers, i've been told when AEV calculates the BS, they don't include the width of the tire lip that holds the tire in place.
Last edited by troyboy; 03-09-2011 at 05:15 PM.
03-09-2011, 05:13 PM
#20
JK Super Freak
I am running 315/75/16s on 4.25" back spacing on my 4 door JK. The tires stick out about an inch outside of the rear fenders...
did you check out the FAQ section ?
https://www.jk-forum.com/forums/show...274#post211274
did you check out the FAQ section ?
https://www.jk-forum.com/forums/show...274#post211274