jk

[Dayfamily]

I put a 4 inch lift on my jeep and I wanted to know what tire to go to. Has to be good on and off road

[hps4evr]

some more details would help please. what do you use this jeep for? is it a rubicon? are you doing wheels too? any other upgrades?

[jpthing]

54" boggers.

Just kidding...I'm no Jk expert (yet, just wait til you can get one below $10K!!) but I think a 35-37 would fit with a 4" lift. There are some great charts that cover this kind of stuff at JP mag website. If you plan to wheel hard it durability will possibly be a problem with anything bigger than a 35" and the gearing might be an issue on the street, unless you have a rubicon with the 4.10's.

2 or 4 door?
Daily driver or not?
Is price and warranty a factor for you?

[Dayfamily]

well I have a stock 4 door jk sahara, I think it as 3.73 gear in it, and I will be using this as a daily driver but playing sometimes and I wanted to know what size rim and tires to put on right now it has the stock 255/70/18 tires and rims

[jpthing]

Again, I'm no JK expert, But I would reccomend 33" or 35" Tires.
Bf goodrich tires are pretty good for the $$ and have the advantage of being available at places like costco and Canadian Tire where the warranty is decent should you wreck one.

I would reccomend BFG all terrains or mud terrain Km2s from Costco in either 33 or 35 size

Bear in mind the km2s, while much better than the old mud terrains in winter, still are not the best for winter driving...If you plan to do much normal driving in winter the all terrains are probably better.

[w squared]

Sahara = Dana 30 up front = 37's may not be a good idea, even if you could fit them with flat fenders or a body lift.

I would go with 35's. You'll need either spacers or new wheels to prevent the wider wheels from rubbing on your suspension components...and other things. You may also find that those gears are a little tall to be running with 35's. Many folks with 35's on a JK indicate that 4.88's or 5.13's seem to be a good fit.

If you've got an automatic transmission, you'll probably end up having to swap out your front driveshaft (the boot on the CV joint tends to contact the crossmember/skidplate for the auto tranny). With four inches of lift, you may have to swap out your rear driveshaft as well (or you may not...YMMV)

What sort of lift did you put on? Did you also get adjustable control arms?

If/When you go to larger tires, you will probably also want to reprogram your computer to reset your transmission's shift point and keep your Speedo accurate. AEV makes a gizmo that will do that for about $200. Northridge sells them.

If your play will be "sometimes", you might be well served by the all terrain tires that JPthing recommends. Some MT tires can be...interesting...to drive in the winter 

[sn4cktime]

If it's a manual you can go up to 35's with that gearing.  If it's an automatic you're going to want to re-gear it then you can stuff 37's with a 4" lift.

Like stated above a D30 isn't going to like 37's very much.  If you go 35's or above gusset the front knuckles.

[shayu]

dana30 is no good for 37'',but who knows?i know some ppl wheeling pretty hard with 37'' on dana30.

it depands on what brand is the lift,for some brand like teraflex,full traction,you can gain more than 5'' if you put a 4''lift on,and also ,some brand like rough country 4'' lift kit,probably you will get 3.5''lift.

as i know,4'' teraflex lift plus flat fender will be perfect for 37''.   

[specialk]

I put a 4 inch lift on my jeep and I wanted to know what tire to go to. Has to be good on and off road

Well, I think 35's would be nice.  As for name brand... I don't want to start another thread about this topic.  If I were to mention the name of a tire that say, started with a 'TR' and rhymed with say, "duxxus",    the next post would be by Bnine who would go ape sheit on me for bringing it up and probably beat me silly the next time he saw me...  

The topic of which brand is best has been covered many times - just search on different tire brands and I'm sure you will find hours of threads full what to run and what not to run.  If you can narrow down your choices, you will get some positive, if not amusing, feedback.

[JackstandJohnny]

37s + D30 = breakage.   been there, rebuilt D30 enough times now i dont' want to again.
stick to 35s i think is not a bad idea.  potential for breakage is still high; but less than 37s. 


some opinions will differ but i still view it as mud terrains are mud terrains, All terrains are all terrains........ doesn't really matter.......  if its a DD i'd go with a decent brand name though,  mickey thompson, Toyo, etc.

[Bnine]

dana30 is no good for 37'',but who knows?i know some ppl wheeling pretty hard with 37'' on dana30.

No you dont. You think you do, but you dont.

We've had plenty of wreckage here with d30's and 35's wheeled hard. 37's, d30, and wheeling hard is not a good recipe.

37's and d30 and dailing driving is not a good recipe due to the wear and tear.

Dayfamily,

like its already been suggest, a 35" tire would be the most you want to go with your current setup. If your jeep is an auto, you will want to regear, else the overdrive in your transmission will be lost, and your milage will suffer greatly.

The inner C's should be gusseted on those axles like Sn4cktime said. He knows were to get them, and I've welded them in before. Cheap insurance against an inner C failing if a shaft ever broke.

Your best all around tire would be something like a Toyo Mt. You can talk to folks like ESI here on the board about getting them at a good discount.


Good luck

[hps4evr]

i just had a jk in the shop today that had a 4inch lift and 35's, looks good and a perfect match. as well the guy used 16" aftermarket rims, they are the soft 8 style rims. there might be enough room for 15" rims but i cannot confirm. a smaller rim would give you more tire options and a cheaper tire.

[Dayfamily]

can I go to smaller rim 15 or 16 inch

[Dayfamily]

what do you do about the tire pressure montor system if I change rims?

[w squared]

16's will work fine. You will need a 5 on 5 pattern, with backspacing between 3.5 and 4.5 inches.

15's are a great big "Maybe". Many people have run 15's on JK's with no problem. Many people have had issues with 15's rubbing on the outer surfaces of their calipers.

You may or may not be able to put the stock TPMS sensors into your new wheels. If you do get one of the AEV ProCal units to re-set your speedo and transmission shift points to reflect your new tire size (a very good idea), it will also be able to de-activate your TPMS