Jim D

I have a 2010 bone stock JD Wrangler Unlimited, a buddy is offering me his 37" x 13.50R 17 tires and rims at a brother in law price. My question is what lift size do I need to go, he is suggesting 4"? What else do I need to plan on besides the lift kit? Driveshaft? Gearing? C Gussets? All needed at the same time. I am looking to wheel this summer but nothing crazy just a few local trails.

OscarMlke

In order for your stock wrangler to handle these wheels/tires, you going to have to do a few major upgrades.

• Gear ratio will need to be grater than 4.10
• You may need wheel spacers to fit that width on your jeep (which I don't recommend)
• You'll put more stress on major components, Like Drag link, Tie rod, Sway bar end links, Wheel barring's etc.
• Lifting the jeep more than 2'' inches, you risk throwing out the jeep's geometry. New Control arms would be needed along with new brackets or mounts.

So unless you're willing to spend more then 3k to make these upgrades, then by all means buy his wheel/tire combo.

Jay2013jk

All of what OscarMike posted .. PLUS.. The JEEP catalogue upfitters only show a Lift Kit of 4 inches or greater.. His $3K number IMO is LOW.. Here's why: re-gear is a $2K minimum.. Lift Kit $1400 + to $3000 (how good & how big). Now what type of Wheeling are you going for? Most wheeling can be enjoyed on 33s or 35s. 33s work with a 2-2.5 inch lift; you would still need spacers or wheels with suitable backspacing. Just my $0.02 worth.

TheDirtman

Typically you are looking in about $10K in upgrades to run 37's but it can easily be more. Lift, driveshafts, gears, C gussets, high steer at a minimum. Axle shafts, Lockers (since you will be in there doing gears) and hydraulic assist would be a couple of options I would seriously be looking at. Then plan on upping your budget for maintenance on things like ball joints, unit bearings, brakes as you will go thru those things faster running 37's. I would not want a 13.5" wide tire either, its just harder on stuff and will require tires with a back spacing of around 3" or the use of wheel adapters.

That "deal" on tires does not look so good now does it?

resharp001

If it was only that easy...... Address/upgrade just about everything under the jeep.

Sv_dude

Bingo! Seriously, everything needs to be done. I’m working towards putting 37’s on my Jeep and I’m over 5g’s into it and I still don’t feel like I’m ready. I have high clearance fenders, all adjustable control arms, tie rod, front and rear drag links, axle truss, gussets, ball joints, steering flip, and I still need to consider hydro steer and chromoly axle shafts and drive shafts. So I need about another 4K to be comfortable on 37’s to play in the rocks.

if you only want it for looks and not playing in the dirt, you can get away with less.

Sixty4x4

Good advice provided Jim and you are not the first to receive it. That's why I like to stay around my current 33's going to 35's next but they are really 34.1". Nobody is trying to talk you out of adding these wheels they are trying to say what you need to stay reliable and withstand the extra loads put on the mechanical components. Jeeps IMO are really functional with wheels that size and look great but they need lots of upgrades to withstand them.

tjkamp

Yup. Agree with everything above. Been building my way to 37s since I bought her new in 13. Slowest build ever, I know.

Finally pulled the trigger on 37s a couple of months ago. Was adding things up in my head the other day, and had to stop. It got too painful! That 10k figure might even be a touch low.

Still have to do something about the fenders, before I get to take her out into the rocks again.

icrashbikes

I will jump in and confirm all of the above!

hivoltagedriver

In addition to all of that, nobody mentioned that your stock (I assume) 3.8L motor is going to feel like even more of a turd dragging all of that weight and rotational mass around.