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Old 07-01-2019, 06:59 PM
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Wisdom on tire size after a 2" suspension lift, please!

We just completed a 2" SL on my 2013 JK last week which turned out great! Now my factory sized tires look small which is fine cuz I need new ones. So it's the gotta go bigger cuz, well, ya gotta! We're definitely going with BFG ko2s. We'd like to go with 285/75r17 but...sizing tires is making my head hurt...will I have to change anything to get those to to fit?

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Old 07-01-2019, 09:02 PM   #2
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Most 285's will fit a 2" lift... some you might need to adjust the steering stops if you get rubbing at full lock.

315's you need a 1.5" wheel spacer, or different wheels with more offset (at least 5.2")

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Old 07-01-2019, 09:42 PM   #3
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Originally Posted by BeyondYourFrontDoor View Post
Most 285's will fit a 2" lift... some you might need to adjust the steering stops if you get rubbing at full lock.

315's you need a 1.5" wheel spacer, or different wheels with more offset (at least 5.2")
To clarify a bit for the OP, offset is measured in mm, 5.2" is backspacing, and is the most you would want for 315, not the least. Stock JK wheel BS is 6.25. 5.2" moves the wheel just over an inch further (1.05") outboard, allowing the extra width of the 315.

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Old 07-01-2019, 10:15 PM   #4
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Are you planning to run wheel spacers? Or get aftermarket wheels? Makes a big difference in the advice I would give...
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Old 07-01-2019, 11:49 PM   #5
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Wheel spacers and 35’s /315’s
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Old 07-02-2019, 04:58 AM
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Are you planning to run wheel spacers? Or get aftermarket wheels? Makes a big difference in the advice I would give...
Neither. I was hoping to keep the same wheels/rims ...for now.😋.
And...I see there's been some commenting on 315's. Am I missing something? Those would be bigger than 285's, right? I mean, it would make sense but with tires nothing has made sense to me especially with BFG.
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Old 07-02-2019, 06:03 AM   #7
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2" lift, flats and 315's on aftermarket rims.. tires fit with out the flats but if disconnected flexed into stock flares etc more than I liked.
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Old 07-02-2019, 06:29 AM   #8
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2" spacer lift with stock wheels and no wheel spacers, I'd recommend 255/80-17. The KO2 you want isn't available in that size, but there are other choices. 285/75-17 seems like a lot of tire to try to put on your setup.
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Old 07-02-2019, 06:40 AM   #9
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Ditto on 255/80-17 if stock rims and no spacers
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Old 07-02-2019, 06:55 AM   #10
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I think you'll be happy with a larger newer tire with aggressive tread like the KO2. Keep in mind the larger the rubber the more of an impact it will have on acceleration, braking, etc.... Don't want to be driving an under-powered, need to be re-geared, Jeep. Start going 315's w/spacers and now you should start thinking about beefing up the front end... it's a endless pit. Toss the next size up KO2's on there and enjoy them! They are a great tire.
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Old 07-02-2019, 09:23 AM   #11
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Neither. I was hoping to keep the same wheels/rims ...for now.😋.
And...I see there's been some commenting on 315's. Am I missing something? Those would be bigger than 285's, right? I mean, it would make sense but with tires nothing has made sense to me especially with BFG.
Thank you for that clarification. You cannot run 315's or in most cases, even the 285's would be a problem without wheel spacers.

That said, you have the 255/80-17 which is a "33" and the 34x10.5x17 BFG KO2 that is also a "33". Those can both be run with the stock wheels and no spacers.

If you are willing to add the wheel spacers, then you can go to the 285/70-17 for sure and it's the same height as those above, but wider.

As for the 285/75-17 on 2" with spacers, it could work depending on bump stops added... Which 2" spacer lift did you install?

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Old 07-02-2019, 02:33 PM   #12
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You can do 285-70-17 on stock wheels. You'll rub the sway bar near full lock, but not much. I ran 295-70-17 on oem wheels and no spacers last year on a 1.5" lift. I lost about 1/4 turn of the steering wheel. With spacers, I gained that all back and rub nothing.
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Old 07-02-2019, 03:06 PM   #13
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I have the 2" Ranchco sport lift on my 2dr with 285/70-17 (33x11.5) on stock rims and they work fine disconnected. be sure your axles are centered however.

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Old 07-02-2019, 06:16 PM
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As for the 285/75-17 on 2" with spacers, it could work depending on bump stops added... Which 2" spacer lift did you install?

https://www.extremeterrain.com/coyot...s-0717-jk.html
I'm so glad to have to posted this becuz the responses are varying quite a bit.
We did the QT 2" coil spring spacer lift kit and I currently have 255/75R17 tires with no issues except low tread.
QT says we can fit 33's but very likely they're playing safe.
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Old 07-02-2019, 07:03 PM   #15
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Quote:
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Quote:
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As for the 285/75-17 on 2" with spacers, it could work depending on bump stops added... Which 2" spacer lift did you install?

https://www.extremeterrain.com/coyot...s-0717-jk.html
I'm so glad to have to posted this becuz the responses are varying quite a bit.
We did the QT 2" coil spring spacer lift kit and I currently have 255/75R17 tires with no issues except low tread.
QT says we can fit 33's but very likely they're playing safe.
Is it this one?

https://www.quadratec.com/products/16400_0X42_PG.htm

No rear bump stops, the 285/75 would rub very hard. Might even pop a fender off...
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Old 07-02-2019, 08:45 PM
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Quote:
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Quote:
Originally Posted by misshell View Post
Quote:
Originally Posted by Pressurized View Post

As for the 285/75-17 on 2" with spacers, it could work depending on bump stops added... Which 2" spacer lift did you install?

https://www.extremeterrain.com/coyot...s-0717-jk.html
I'm so glad to have to posted this becuz the responses are varying quite a bit.
We did the QT 2" coil spring spacer lift kit and I currently have 255/75R17 tires with no issues except low tread.
QT says we can fit 33's but very likely they're playing safe.
Is it this one?

https://www.quadratec.com/products/16400_0X42_PG.htm

No rear bump stops, the 285/75 would rub very hard. Might even pop a fender off...
.
Yep, that's what we have.
Insert favorite f-bomb here!!!!
So...no go then...or yes with spacers...or....??
Hmmmm...
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Old 07-02-2019, 10:30 PM   #17
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Remember, 285/75 is almost a 35... You'd need the wheel spacers for sure and at least 1" rear bump stops and maybe 2"...

With the wheel spacers you could do the 285/70 no problem and possibly a 295/70. Some people do get away with the 285/70 without wheel spacers, but it's likely they will rub on suspension at full lock.
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Old 07-03-2019, 12:35 AM   #18
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I am running the 295/75/17 tires (34.4 inches) on my 2018 with aftermarket wheels and a -12 offset. The 285/75/17's are about 1 /2 inch smaller (33.8). I have a 2 1/2 inch lift / level kit and no rubs in my daily driving. Have not been serious off roading yet so I have not experienced any tire rubs. It all depends on if you want to trail your Jeep or not and if you use stock wheels or aftermarket ones. Hope this helps.
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Old 07-03-2019, 02:39 AM   #19
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315 on a 2.5 lift.
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Old 07-03-2019, 12:05 PM   #20
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Ditto on 255/80-17 if stock rims and no spacers
This. My 2015 JK has this setup with 2" lift...which actually netted 2.75 in front and 2.5 in back. Falken Wildpeak 3 AT. Pizza cutter look, which I like. If you want a wider stance appearance, you might consider wider tire.
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Old 07-03-2019, 02:18 PM   #21
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You can do 285-70-17 on stock wheels. You'll rub the sway bar near full lock, but not much. I ran 295-70-17 on oem wheels and no spacers last year on a 1.5" lift. I lost about 1/4 turn of the steering wheel. With spacers, I gained that all back and rub nothing.
I agree.
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Old 07-03-2019, 08:36 PM   #22
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2.5 lift with 285 70 17, stock wheels and spacers. I'll agree with what has already been said...285's or larger will rub most likely on swaybar unless spacers or aftermarket wheels with around 4.5" of backspacing are used. And again the 255 80 17 is a great choice for stock wheels no spacers.
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Old 07-04-2019, 11:29 AM
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Dang it! Now all y'all's got me looking at new rims! Dang forum wisdom seems to make my paychecks disappear...good thing we didn't have kids otherwise I'd have to explain why Santa got each one of them a Jeep part.
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Old 07-04-2019, 11:47 AM
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Okay...now the next question, because I've learned to trust the expertise on this forum (Seriously, I thank the Jeep gods for you guys)
In your opinion, whose rims have you had the best luck with?
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Old 07-04-2019, 01:00 PM
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Wheel spacers and 35’s /315’s
wow, I just caught what you posted after Mr pressurized's questions. 10 points to you! Very funny and beginning to look very likely on my part. Lol!
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Old 07-04-2019, 02:30 PM   #26
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wow, I just caught what you posted after Mr pressurized's questions. 10 points to you! Very funny and beginning to look very likely on my part. Lol!
Your lift still will not handle that size tire without some additional parts. You need 2" bump stops in the rear to handle a 35" tire. If you added rear bump stops and wheel spacers, you would be good to go on the 285/75-17 tires.
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Old 07-04-2019, 03:09 PM
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Your lift still will not handle that size tire without some additional parts. You need 2" bump stops in the rear to handle a 35" tire. If you added rear bump stops and wheel spacers, you would be good to go on the 285/75-17 tires.
Yep, agreed. We were just discussing the rear bump stops after rereading your posts. Of which also led us into a fender flare discussion...
And that quiet hiss you're hearing is the slow death of yet another paycheck...
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Old 07-05-2019, 05:26 AM   #28
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Yep, agreed. We were just discussing the rear bump stops after rereading your posts. Of which also led us into a fender flare discussion...
And that quiet hiss you're hearing is the slow death of yet another paycheck...
Yes, that is SOP when owning a Jeep...

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Old 07-07-2019, 05:47 AM   #29
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These are 285/70/17 (33's) on Fuel wheels the lift is a Rancho 2 inch sport with 1/2 inch spacers in the front I gained 2.5 inches in the rear and 3 inches in the front with this kit over stock at full lock left or right I have no rubbing.
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Old 07-10-2019, 09:35 AM   #30
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This. My 2015 JK has this setup with 2" lift...which actually netted 2.75 in front and 2.5 in back. Falken Wildpeak 3 AT. Pizza cutter look, which I like. If you want a wider stance appearance, you might consider wider tire.
Dave556 - this is my plan. Do you have any pics?

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