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Old 08-10-2014, 03:15 PM   #1
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2.5" lift Wheel and Tire Help!

Hi fellow jeepers! I'm basically a noob and I have come into some money. I am running stock suspension which is horribly sagging and need new wheels as well. The tires have tread but I want to flip my jeep around. I am thinking a 2.5" suspension lift with 30" or 31" tires. I will need some new wheels so does anyone know what size wheels would work? Any help is appreciated. Thanks!

P.S. I don't understand how to tell my current tire size. So if anyone can tell me about all those numbers I'd appreciate it. Thanks.
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Old 08-10-2014, 04:49 PM   #2
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Need to know what size rims you have. They almost look like 16" and I am not sure of the width. What are the size tires? That will give a hint as to how wide of tire you can have. Typically, with a 2 1/2" lift you can fit 31s and even 32s. You can go up to 33s, but then you risk rubbing when flexing. I would recommend going with 31 or 32s. I too have the stock suspension and ordered a RE 2.5" lift w/shocks for my rig. I am looking in to replacing the 28-29" with 31s or even 32s with a 10.5" width. I have stock rims that are 15x8.

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Old 08-10-2014, 08:15 PM   #3
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Wrangler radial P235/75R15


Width: 235
That's what my tires say. My tires are fairly wide
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Old 08-10-2014, 09:37 PM   #4
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235 is roughly 9.25" wide. you might want to consider what consider what engine, trans an axle ratio you have when making tire selection. it may not matter, but it may. 30 or 31 tall probably won't matter unless you have the 3.07 ratio
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Old 08-10-2014, 10:03 PM   #5
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You can fit 31x10.5x15 on stock 15x7 rims, but the stock backspacing is usually 5.5" and will result in rubbing on the frame/swaybar when you turn the steering wheel fully left or right, unless you adjust the steering stop to limit the steering motion (but doing so will reduce your turning radius).

If you are interested in new wheels, a 4.5" backspaced wheel will fit 10.5" wide tires just fine with no frame rub, without need to adjust the steering stop. Wheel widths of 7-9" are most often recommended for 10.5" wide tires. Put that all together and you are looking at a 15x7, 15x8, or 15x9 wheel with no more than 4.5" of backspace. You can go with lower backspace (4", 3.5"), if you want the tires to stick out more, which will give the Jeep a wider stance.
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Old 08-11-2014, 12:19 PM   #6
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My wheel base is abnormally wide. That's how I got her. Without the flares the tires would poke out in a unattractive way. But would I choose 15x7 or 15x8 rims for a 31" tire? Sorry if i am not understanding something. All the numbers make me scratch my head. Lol.
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Old 08-11-2014, 04:10 PM   #7
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ORV by Rugged Ridge 2" to 2.5" Leaf Spring Lift Kit with Nitro Shocks


Get up to $200 Cash Back! Get Rebate Form
Part Number:
ORV-1841520
Our Price:
$679.99
+ Free Shipping*
Quantity:

Vehicle Fitment
1987-1995 Jeep Wrangler YJ

Product Details
ORV by Rugged Ridge 2" to 2.5" Leaf Spring Lift Kit with Nitro Shocks

Fits:
1987-1995 Jeep Wrangler YJ

Special Notes:

Kit allows tire size up to 31".

Actual lift height is dependent on specific Jeep characteristics and additional parts being put on the vehicle (bumpers, winch, hard tops, soft tops etc.)

Product Overview:
ORV only uses nitrogen charged gas shocks for all their kits. The gas shock, in combination with the ORV kits provides a better ride both on and off road. By using an ORV Lift Kit and matching gas shocks, you optimize the suspension's capabilities, giving you a better ride both on and off road. Another advantage to Nitro Gas Shocks is their ability to prevent body roll. This is extremely important, as body roll will kick in the ESP sensors, which will shut the vehicle down.

All springs are made of ductile iron (memory metal) and are shot-peened for additional strength. By using ductile iron, the ORV Springs keep their memory, eliminating any possibility of future sag.


Kit Includes:
4 powdercoat painted, shot-peaned Leaf Springs with Teflon inserts
4 Nitro Shocks
8 U Bolts
All necessary hardware
Neoprene-wrapped grab handles
All ORV kits include a FREE Off Road Organizer for your Jeep glovebox.

Shock Features:
150 PSI pressurized Nitrogen Gas
Internal valving; the internal orifice will rotate when the piston moves more than 2", automatically adjusting to make the ride as smooth as possible
Twin tube construction to lower heat build up and protect the shock from off-road obstacles.
Bonded Iron 14mm piston with extra chroming; provides for a longer, rust free life.
Polyurethane bushings and a black shock boot
Limited lifetime warranty on the shocks

This is the lift I am considering getting. Any opinions on this brand? All info helps. I'm only 17 and have little experience.
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Old 08-11-2014, 04:53 PM   #8
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I bought the rugged ridge springs with no shocks and used JKU shocks and new shackles. Rides great and no complaints. I think I only paid about half that.
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Old 08-11-2014, 05:44 PM   #9
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I figured out what wheels i need. Thanks for the back spacing tip! Saved a headache. As for the lift, my current shocks are old and rusty so I figured I'd go fresh. Do you have other shock recommendations so I can order without shocks?
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Old 08-11-2014, 09:36 PM   #10
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Quote:
Originally Posted by Unit 313 View Post
My wheel base is abnormally wide. That's how I got her. Without the flares the tires would poke out in a unattractive way. But would I choose 15x7 or 15x8 rims for a 31" tire? Sorry if i am not understanding something. All the numbers make me scratch my head. Lol.
My response was based on the assumption that you had stock rims and stock axles, but since you mention your tires already stick out quite a bit tells me that something isn't stock. Either aftermarket rims, wheel spacers, or even wider non-YJ axles. You need to figure out what is making your wheels stick out so much and then decide on what to do from there.

As far as the rim size: 15x7 means 15" diameter rim that is 7" wide (where the tire mounts to the rim). A narrower rim will result in the tire bulging like a balloon, a wider rim will have less bulging. In general, 31"x10.5"x15" tires are recommended to be mounted on rims that are 7"-9" wide. I like how mine look with 8" wide rims, but it is personal preference.
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Old 08-11-2014, 09:39 PM   #11
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Hmm. I will check. I feel it is the rims. As the tires seem wider than most tires this size. Thanks for the input! I will probably go with 15x8
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Old 09-14-2014, 08:56 PM   #12
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Lift installed. Thinking 31's
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Old 10-10-2014, 01:58 PM   #13
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Old 10-10-2014, 02:42 PM   #14
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Did you go with the 31s? I have a 2.5" lift and am doing the same. I have the lift on and the tires are purchased, but not mounted and balanced yet, otherwise, I would post you a pic of mine.
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Old 10-10-2014, 09:41 PM   #15
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Yes I have a Rough country 2.5 lift with 31" Hiflys, it's great. But I did need a TC drop :P
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Old 10-10-2014, 10:09 PM   #16
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Looks good. Are you going to the jeep freeks reunion in saltlake tomorrow. 8-1 off 19th west and 35th south. At 1 they are doing a convoy to 5mile
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Old 10-11-2014, 07:57 PM   #17
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No I can't make it. Jealous! I'm dying to go to something like that!

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