what tires fit 3 inch lift? - JeepForum.com
 
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post #1 of 10 Old 04-21-2017, 09:13 AM Thread Starter
tstock0885
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what tires fit 3 inch lift?

My xj has a rough country 3 inch lift with no sagging yet. What size tire can i fit with no fender cutting? With fender cutting? Does putting on bigger tires affect or damage anything over time. I am running 31' mud tires now. Thanks.

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post #2 of 10 Old 04-21-2017, 11:38 AM
bluejunior
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Originally Posted by tstock0885 View Post
My xj has a rough country 3 inch lift with no sagging yet. What size tire can i fit with no fender cutting? With fender cutting? Does putting on bigger tires affect or damage anything over time. I am running 31' mud tires now. Thanks.
30x9.5 will fit easy. 31x9.5 usually fits fine, 97+ might need a little trimming of the bottom corners of the front fender/ bumper endcaps.

31x10.5 fits with less backspacing, something like 3.75-4.25 rather than the usual stock 5.25. Again, 97+ in particular may need a little trimming at the corners. I run 31x10.5 on RC 3" coils with 3.75 backspacing 15x8 rims. Needed a little trim at the back bottom corners up front.

With aggressive trimming, bumpstopping and backspacing 33's are very doable and some users like redjeepster have gone as big as 35's. That starts getting into how much you're willing to modify the body and if you can re-weld spot welds that get cut away from the fenders, though.

The bigger you go without regearing your axles, the more load you put on your engine and transmission. This will manifest itself mostly as additional heat. I run my 31's with 4.10's (automatic) and that feels about right. I wouldn't want to go bigger on the stock 3.55 gears (3.07 for manuals), it's driveable but you start adding a lot of extra stress on hills, tow/haul, etc... plus it'll really big down and your city mileage will go to absolute **** since your drivetrain is trying to fight a lot of inertia to start them spinning without much advantage.

That's probably the biggest factor in the tire sizes below a 35. At 35 you start really pushing the stock steering, axles and even brakes. There are upgrades to address those things but I'm not sure of you're planning to go that extreme.

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post #3 of 10 Old 04-23-2017, 09:45 AM
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With3" 33" tires work with the right rims. With bigger tires you should consider changing your axel ratio. Go to Novak Adapters site and look at their gearing page. This will let you know your crawl ratio and speed, rpm etc.


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post #4 of 10 Old 04-23-2017, 09:53 AM
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I did a 6" on my Comanche with 35" with 4.88:1 a limited slip Ford 8.8 out of an explorer (there are tons of these in the junk yard)
Up front is a control arm drop and spring over rear. The Ford axel has disc brakes in the rear.
I have a wrangler with a 4" and 33x12.50 had to go with a 4" offset.


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post #5 of 10 Old 04-23-2017, 12:03 PM
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31 x 10.5 tires are the most common size used with a 3 inch lift. No metal cutting is needed and maybe just some slight trimming of the plastic bits. 31's are also about as big as you should go without changing the axle gear ratio.

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post #6 of 10 Old 04-24-2017, 05:45 AM Thread Starter
tstock0885
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Originally Posted by CJ7-Tim View Post
31 x 10.5 tires are the most common sized used with a 3 inch lift. No metal cutting is needed and maybe just some slight trimming of the plastic bits. 31's are also about as big as you should go without changing the axle gear ratio.
Quote:
Originally Posted by bluejunior View Post
30x9.5 will fit easy. 31x9.5 usually fits fine, 97+ might need a little trimming of the bottom corners of the front fender/ bumper endcaps.

31x10.5 fits with less backspacing, something like 3.75-4.25 rather than the usual stock 5.25. Again, 97+ in particular may need a little trimming at the corners. I run 31x10.5 on RC 3" coils with 3.75 backspacing 15x8 rims. Needed a little trim at the back bottom corners up front.

With aggressive trimming, bumpstopping and backspacing 33's are very doable and some users like redjeepster have gone as big as 35's. That starts getting into how much you're willing to modify the body and if you can re-weld spot welds that get cut away from the fenders, though.

The bigger you go without regearing your axles, the more load you put on your engine and transmission. This will manifest itself mostly as additional heat. I run my 31's with 4.10's (automatic) and that feels about right. I wouldn't want to go bigger on the stock 3.55 gears (3.07 for manuals), it's driveable but you start adding a lot of extra stress on hills, tow/haul, etc... plus it'll really big down and your city mileage will go to absolute **** since your drivetrain is trying to fight a lot of inertia to start them spinning without much advantage.

That's probably the biggest factor in the tire sizes below a 35. At 35 you start really pushing the stock steering, axles and even brakes. There are upgrades to address those things but I'm not sure of you're planning to go that extreme.

Ok. Thanks, guess i am keeping my 31's till i get more money to upgrade gears.
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post #7 of 10 Old 04-26-2017, 01:43 PM
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Heres mine with rc3in aal. And 31s

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post #8 of 10 Old 04-27-2017, 07:17 AM
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You may start rubbing the LCA's (at near full turn) before you get into plastic or metal. With stabilizer bar intact you can go bigger, with disconnects you trim more.
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post #9 of 10 Old 04-27-2017, 07:49 AM Thread Starter
tstock0885
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Originally Posted by minegun2 View Post
Heres mine with rc3in aal. And 31s

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Yup. pretty much how mine looks. I have the same front bumper, for what they cost, they are really good quality!
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post #10 of 10 Old 04-28-2017, 09:29 AM
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Yup. pretty much how mine looks. I have the same front bumper, for what they cost, they are really good quality!
Yes i love the bumper old school look to it with high clearence. And great price. Right now im chaseing a high voltage issue :/

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