4" Lift with 37"s - backspacing issue with wheel - 2008 jk 4 rubicon unlimited
07-25-2010, 08:55 PM
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4" Lift with 37"s - backspacing issue with wheel - 2008 jk 4 rubicon unlimited
Ive got a 2008 4 dr Rubicon unlimited with the 32" BFG KMs. So far I've got
1. Full Traction Short Arm 4" Lift
2. 4 Teraflex 9550 Shocks
3. Fox Racing steering stabalizer
4. Rugged Ridge XHD front and rear bumper/tire carrier
Now I'm looking for a set of wheels and tires to match. Ive decided on going with 37"(37x13.5x20) Nitto Mud Grapplers and 20" Motto Metal 951's. Im set on the nittos but still am uncertain on the wheels. There are 20x9 and 20x10 of the 951s but the 20x10 does not come with a 5x5 pattern. Should i get the 20x9 or 20x10 motto metal's? What offset/backspacing should i be getting? What spacers should i be looking at? with a 37" tire and a 4" lift it is recommended to get a 4.5" backspacing or less. If i go 20x10 i will have to get a spacer to convert the 5x5 to another pattern. What are the symptoms of changing the bolt pattern, if any?
1. Full Traction Short Arm 4" Lift
2. 4 Teraflex 9550 Shocks
3. Fox Racing steering stabalizer
4. Rugged Ridge XHD front and rear bumper/tire carrier
Now I'm looking for a set of wheels and tires to match. Ive decided on going with 37"(37x13.5x20) Nitto Mud Grapplers and 20" Motto Metal 951's. Im set on the nittos but still am uncertain on the wheels. There are 20x9 and 20x10 of the 951s but the 20x10 does not come with a 5x5 pattern. Should i get the 20x9 or 20x10 motto metal's? What offset/backspacing should i be getting? What spacers should i be looking at? with a 37" tire and a 4" lift it is recommended to get a 4.5" backspacing or less. If i go 20x10 i will have to get a spacer to convert the 5x5 to another pattern. What are the symptoms of changing the bolt pattern, if any?
07-26-2010, 05:36 AM
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JK Freak
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i have 37 x12.50 on 4.5 back spacing. they rubbed on the sway bar, the remote res fox shocks and the frame. i added 1.25" spacers for a net backspacing 3.25. if i was buying new wheels today i would look for 3.5 backspace. good luck 
07-28-2010, 11:36 PM
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Alright Ive taken a look at my final choices for the moto metal 951 and this is what I've come up with so far. Since the 20x10 does not come in 5x5 i have found two different wheels spacer that will convert 5x5 to 5x5.5 that measure 1.375" and 1.25". so i will get a "true" backspacing of 3.415" and 3.54" respectively because the 20x10 comes in a 4.79" backspacing. I could also go 20x9 with a 5.71" backspacing and 1.75" spacer for a 3.96 "true" backspacing. i would like to stick with the 20x9, so my question is will the 3.96" "true" backspacing be enough so no rubbing will occur with the 37" grapplers that are 13.5" wide
07-30-2010, 03:17 PM
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Alright Ive taken a look at my final choices for the moto metal 951 and this is what I've come up with so far. Since the 20x10 does not come in 5x5 i have found two different wheels spacer that will convert 5x5 to 5x5.5 that measure 1.375" and 1.25". so i will get a "true" backspacing of 3.415" and 3.54" respectively because the 20x10 comes in a 4.79" backspacing. I could also go 20x9 with a 5.71" backspacing and 1.75" spacer for a 3.96 "true" backspacing. i would like to stick with the 20x9, so my question is will the 3.96" "true" backspacing be enough so no rubbing will occur with the 37" grapplers that are 13.5" wide
