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Old 10-08-2013, 10:06 PM   #1
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2.5 aev lift can't decide on tire size

Ok so I have been doing searches for weeks and still can't decide. I have a 2013 jku Sahara and 99% sure 3.21 gears and just added a 2.5 aev lift. I also have a set of mickey thompson sidebitter wheels. Now I am dead set on Duratracs as they will be the best tire for my use ( DD weekend toy exploring rig) and they are winter rated witch I need here in quebec Canada by law.
My real problem is do I go with
285/70R17
Or
315/70R17

I'm worried the 285 will look too small. But will fit on the stock tire carrier.
And the 315 will make me suffer as I will not be able to do a re gear till spring also I have read conflicting posts that the extra weight will cause damage to my front axel.

Thanks for and advice.

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Old 10-08-2013, 10:08 PM   #2
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Oh here is a pic of my jeep after the lift with my 265/70R17 mtz
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Old 10-08-2013, 10:15 PM   #3
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go with 35's. regear in spring
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Old 10-09-2013, 06:06 AM   #4
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Bump. Anyone else can share their thoughts or experience. I will prob do the 315 and re gear in spring as it has been stated before nothing is worse than spending a bunch on tires and then thinking they are too small.
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Old 10-09-2013, 06:12 AM   #5
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35's all the way
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Old 10-09-2013, 06:33 AM   #6
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35s,and regear to 4.10s, works great for me but it's also pretty flat around here land wise
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Old 10-09-2013, 07:30 AM   #7
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Ok so I guess the next question is will my front axel bend or blow up with the 315's I know the stock Sahara wheel and tire weighs in around 72lbs. And the 315 duratrac is 60lbs add my 32lbs mickey thompson and the new package will be 92lbs. I do know that 20lbs will hurt gas milage and I don't really care I only drive in to work 3 days a week ( 50km there 50km back so 100km each day all highway) the rest of the time just putting around town or exploring the countryside. I just don't want to damage anything if it can be prevented.
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Old 10-09-2013, 07:57 AM   #8
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I'm running AEV also and went with the 285's. You can see pics in my sig thread.

I think it's all a matter of usage whether it will hurt anything. Driving around town? Probably not. I didn't want to mess with reinforcement of the "C's" and whatnot, so I stayed smaller.
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Old 10-09-2013, 08:47 PM   #9
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I struggled with this decision as well for the past year and after 16000 kms on my stock mud terrains finally decided on 285-70/17 duratracs. While i would have liked to go with 315s i have now added so much aftermarket gear (including aev lift, bumpers, wheels) that my jeep is hundreds of pounds heavier and fuel economy is running around 17 mpg - and i don't want to see it drop further. Having to trim pinch seams and deal with tire rubbing on full lock etc are all things I didn't want to deal with at this time of year either. Being from MB i too needed a winter-rated tire and thus the DT's. I should have taken a close look at the Adventure Kevlars as well but I think the DTs will serve me well next summer. One (nice?) thing is i can hear wind noise now and not just tire noise - the DTs are much quieter.

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Old 10-09-2013, 09:36 PM   #10
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I have AEV 2.5 and had 265/70R17 and looked too small IMO, so i installed 315/70R17 duratracs two weeks ago and I love it. Check out my profile picture.
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Old 10-09-2013, 09:51 PM   #11
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Here are some pictures.

First is with 265's and next are with 315's
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Old 10-09-2013, 10:53 PM   #12
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Quote:
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Here are some pictures. First is with 265's and next are with 315's
I'm in the same boat w/2.5" lift but not sure about tire size. I've got 4.10 gears so not to worried about 315's slowing me down. That last picture has basically sold me, that's a really good looking setup.
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Old 10-10-2013, 06:23 AM   #13
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Ok so I have decided to go with the 285's for my use right now I think they will work out better for now. And while driving around on them I can take that time to upgrade my gears, reinforce my front axel and get a tire carrier to do the 35's right.

One more question is a procal really needed going to 285/70r17 I did a search and found some say yes some say no.
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Old 10-10-2013, 07:43 AM   #14
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For $150, I got one because it's handy to have.

Required going from a 32" to a 33"? Not really. My speedometer was only off by 1 MPH.
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Old 01-26-2014, 01:19 PM   #15
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Well I currently have 285/70R17 on my 2dr JK, but when I get my JKU in I'll just swap them to the new one. Ill lift it and run those tires until they're out and then I'll look at going up to 315/70
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Old 01-26-2014, 01:24 PM   #16
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315 70 17 ftw
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Old 01-26-2014, 01:24 PM   #17
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285/75/17 and re-gear at the same time
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Old 01-27-2014, 08:46 AM   #18
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go to 315s and regear to 4.88 in the spring. I went with 285 and love them for dd but definitely want that bigger and meaner look. I am running the 2.5 RK stock mod and get about 3 inch of lift. I will eventually go to a dana 44 front axle but thats another year and paycheck
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Old 01-27-2014, 09:01 AM   #19
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33s on 17s doesn't give you enough sidewall for off roading , so I would at least do 35s
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Old 01-27-2014, 09:12 AM   #20
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315/70/17 Duratracs. Boom. Done.

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Old 01-27-2014, 09:14 AM   #21
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Quote:
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315/70/17 duratracs. Boom. Done.
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Old 01-27-2014, 11:08 AM   #22
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Quote:
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Here are some pictures. First is with 265's and next are with 315's
Sold!
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Old 01-27-2014, 12:23 PM   #23
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I was struggling with the same issue.
Went with the 315's and won't look back!
2 inch lift on a 2014 Rubi X.
Thanks,
Matt

IMG_20131205_102845 by mattpetrich@sbcglobal.net, on Flickr
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Old 01-27-2014, 01:41 PM   #24
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Split the difference and look at 305/70/17 (33.5~). Size falls right between 285/70/17 (32.8~) and 315/70/17 (34.5~) If you are not playing in the big "rocks" or deep "mud" then there is no need to go bigger except to fill up the wheel well.
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Old 01-27-2014, 03:12 PM   #25
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AEV 2.5" lift with 35x12.5x15 tires. 4.88 gears
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Old 01-28-2014, 10:22 AM   #26
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AEV 2.5" lift with 35x12.5x15 tires. 4.88 gears
Nice setup!!
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Old 01-28-2014, 12:19 PM   #27
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I went down to 33" from 35" with 411 gears better for towing my boat & works for my needs TF 2.5 lift
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Old 01-28-2014, 12:23 PM   #28
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anyone running 285/75R17?
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Old 01-28-2014, 11:01 PM   #29
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I have been considering my options since last May when I purchased my unlimited Sahara. After reviewing this site for 100s of hours I have decided that my daily driver/weekend worried unlimited 2013 will receive the following upgrades:

1- 315 Tire
2- 17" Rim
3- 2.5" lift
4- 4.56 Gear

If I had something to tow like a heavy boat or trailer I would upgrade to a 4.88 ratio.

Cheers!
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Old 01-29-2014, 12:22 AM   #30
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Good choice of well matched components!

Make sure to post some pics.

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