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JK TECHNICAL FORUM
FREQUENTLY ASKED QUESTIONS
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to the
JK TECHNICAL FORUM
FREQUENTLY ASKED QUESTIONS
and
POPULAR THREADS
Standard acronyms used on the forum:
BB - Budget Boost (Spacer Lift)
BL - Body Lift
CV Joint - Constant Velocity Joint
LA - Long Control Arm
LCA - Lower Control Arm
MA - Mid length Control arm
MML - Motor Mount Lift
RTI - Ramp Travel Index
SA - Short or Standard Control Arm
SYE - Slip Yoke Eliminator
UCA - Upper Control Arm
I4 - Inline engine, 4 cylinder, 2.5L
I6 - Inline engine, 6 cylinder, 4.2L or 4.0L
V6 - Engine used in (JK - 3.8 liter) and (Liberty - 3.7 liter)
V8 or (hemi) - Engine used in Grand Cherokees
FAQ: Will it rub? By (NaeKid) http://www.jeepforum.com/forum/f96/faq-will-rub-610856/
The JK with stock wheels, no wheel spacer, no lift
32" tires: no rubbing
33" tires: minimal rubbing unless extended bumpstops used
35" tires: don't try unless extended bumpstops used
The JK with stock wheels, 1 1/4" wheel spacer, no lift
32" tires: no rubbing
33" tires: some rubbing on full turn which can be controlled by extended bumpstops
35" tires: don't try unless extended bumpstops used
The JK with stock wheels, 1 1/2" wheel spacer, no lift, Bushwhacker flat-top flares
32" tires: no rubbing
33" tires: no rubbing
35" tires: rubbing that can be cured with trimming pinch-seam
37" tires: don't try
The JK with stock wheels, 1 1/4" wheel spacer, 2" lift
33" tires: no rubbing
35" tires: some rubbing
37" tires: don't try
The JK with stock wheels, no wheel spacer, 2 1/2" lift
33" tires: no rubbing
34" tires: some rubbing on street, sway bars connected
35" tires: significant rubbing
37" tires: don't try
The JK with stock wheels, 1 1/4" wheel spacer, 4" lift
33" tires: no rubbing
35" tires: no rubbing
37" tires: some rubbing - trim flares and pinch-seam
38" tires: be careful
39" tires: don't try
What the above chart shows is that there are many different combinations that will allow for different tire sizes. By changing the stock rims out for aftermarket rims you can run all kinds of different tires. By trimming fender-flares, adding bumpstop-extensions, changing to long-arms, adding body-lifts, etc, you will be able to fit virtually any tire that you want to fit on your JK. It has been reported that a 3 1/2" lift with minor trimming of the body / flares allows fitment of 37" tires on non-stock rims with very minimal rubbing on extreme articulation, perfectly fine for street or light-trail use.
Done :thumbsup:
What kinds of wheels can I run on my JK?
Of course, any stock wheel that comes with the JK will be able to be used. If you are looking through the junk-yard and you find some rims that you really like, make sure that they are a 5-bolt pattern on 5" diameter. Chevy 1/2-ton pick-up trucks in the 2wd variety use this bolt-pattern. YJ and TJ rims are 5-bolt on 4 1/2" diameter, not directly compatable with JK axles. Using wheel adapters (like made by SpiderTrax) will allow you to put 15" or 16" YJ or TJ rims onto your JK.
You will be able to fit some 15" rims and all 16" and bigger rims on your Jeep. The only problem that you might run into is the brake-caliper rubbing on the inside of the 15" rim, depending on off-set. If you find the rims you choose rub - a set of wheel-spacers can be installed to move the rim further from the caliper.
Check the tire-manufacturer's recommended rim-width prior to running the tires on the rims that you choose yourself.
Note: This chart will be updated as people report back on different lift / wheel / spacer combinations. If you try a combination that works that isn't listed here yet, please send a PM with the details of the lift and we will update as soon as possible
