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Old 07-31-2013, 03:18 PM   #1
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What exactly do you need to do to run 315/70r17 Duratracs?

First, my JKU is bone stock besides ACR rock sliders. Its a 2013 with 3.73 gearing. I have decided to go with a 17" XD Addicts as my rim of choice, and am torn between the 285/70r17 Duratracs and 315/70r17. This will be 99% on road use, I care mroe about MPGs than rock climbing ability(it will see some mud and forest roads is all). I have not decided on any other mods, as I figured it was best to start with deciding how big my tires are going to end up being.

My main problem with the 285's is I am just not convinced it will be enough of a difference over stock to justify $2k. My problem with the 315's is I am pretty sure the MPG drop will be significant, the mods to run them properly will be significant, and the daily driver aspect of the vehicle may suffer too much(my wife already has a little trouble entering my stock height Sahara).

So, what are the minimum mods I will need to safely and comfortable run the 315's? Will a Teraflex Leveling Kit get it done? Perhaps the Rancho 2" sport lift? Or will I need to look at full normal 2.5" lift kit like the AEV one? I assume I need a solution to hold the spare tire, will need to trim the pinch seams and my Rubicon rock rails. Is there anything else I need?

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Old 07-31-2013, 04:00 PM   #2
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I'm debated the same thing about 6 months ago and decided to go with the 315's. They measure just a little under 34". I'm so glad I didn't go with the 285 which is basically the same height as stock tire. I also have 3.73 gears and my average MPG (city/hwy) is around 18. My last trip was mostly road miles (back roads running between 45 and 60 mph) and my MPG was 19.5.

You can run the 315's on a stock JK but will need to trim the air dam (plastic guard installed under the front bumber). Tire will rub slightly on full turn.
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Old 07-31-2013, 04:39 PM   #3
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Quote:
Originally Posted by lesgoff View Post
I'm debated the same thing about 6 months ago and decided to go with the 315's. They measure just a little under 34". I'm so glad I didn't go with the 285 which is basically the same height as stock tire. I also have 3.73 gears and my average MPG (city/hwy) is around 18. My last trip was mostly road miles (back roads running between 45 and 60 mph) and my MPG was 19.5.

You can run the 315's on a stock JK but will need to trim the air dam (plastic guard installed under the front bumber). Tire will rub slightly on full turn.
Really, so I can get by with running them on a stock JKU with just trimming the air dam? If so, that implies I could get by with the leveling kit only. I am scared to lift it with a 2.5" lift to be honest, as it is going to get dangerously close to not fitting in my garage anymore with 35's and a 2.5" lift, especially sicne it seems the majority of 2.5" lifts give more than that. It would really suck to drop $3k on tires and a lift and get it home and it won't fit in the garage anymore.
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Old 07-31-2013, 04:43 PM   #4
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Really, so I can get by with running them on a stock JKU with just trimming the air dam? If so, that implies I could get by with the leveling kit only. I am scared to lift it with a 2.5" lift to be honest, as it is going to get dangerously close to not fitting in my garage anymore with 35's and a 2.5" lift, especially sicne it seems the majority of 2.5" lifts give more than that. It would really suck to drop $3k on tires and a lift and get it home and it won't fit in the garage anymore.
With no lift it will look pretty squatty I think. I wish mine had a little more lift or 37's actually.
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Old 07-31-2013, 04:45 PM   #5
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Not sure of the clearance with your garage, but my JK is on 35's and a 3.5" lift and it still fits in my garage (barely). Just FYI. That Jeep up there looks real good, lesgoff!
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Old 07-31-2013, 05:21 PM   #6
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I had my 315 duratracs on for a few weeks before my AEV 2.5. Looked awesome. Little trim on the air dam is necessary. You will also have to trim the pinch seam. Without any wheeling you will be mostly fine. Occasional rubbing if you get off camber a little.
I would recommend at least a little lift but probably not necessary.
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Old 07-31-2013, 10:55 PM   #7
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Originally Posted by hair2831 View Post
Not sure of the clearance with your garage, but my JK is on 35's and a 3.5" lift and it still fits in my garage (barely). Just FYI. That Jeep up there looks real good, lesgoff!
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Old 08-01-2013, 05:56 AM   #8
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I have those exact tires and wheels on my jeep, I have bushwacker flatties , stubby bumper, trimmed pinch seam, and trimmed rubi rock rails and they fit with no rubbing
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Old 08-01-2013, 08:37 AM   #9
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I am running them with the tera leveling kit, air dam removed and pinch seam trimmed. No problem. Would want flat fenders before I wheel it though.
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Old 08-01-2013, 01:01 PM   #10
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I have these tires on Rugged Ridge all black 17x9s.Also using a Teraflex spare tire frame with the stock tire carrier.This setup fits perfect with the stock rear bumper,the tire sets right in the bumper and the 3rd brakelight clears the top.I did order new Daystar bumpstops.Solid and strong! Hope this helps!
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Old 08-01-2013, 03:21 PM   #11
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Her are a few shots of 315/70/17 Duratracs w 2.5"AEV Lift.Also a pic of spare tire setup mentioned in previos post!Hope this helps!
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Old 08-01-2013, 04:22 PM   #12
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Originally Posted by Area 51 View Post
Her are a few shots of 315/70/17 Duratracs w 2.5"AEV Lift.Also a pic of spare tire setup mentioned in previos post!Hope this helps!
like your bumper!! which one is it?
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Old 08-01-2013, 04:43 PM   #13
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I like that bumper too! Actually, your whole jeep looks awesome.
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Old 08-01-2013, 05:39 PM   #14
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Thank You,got some ideas from the forum and thought some on my own.Many hours looking through catalogs and websites!The bumper and skidplate is by Body Armor 4x4.They also make a rear bumper as well but I like the stock one with the mudflaps.I am in South FL and my offroad is flat,sand and gravel so the mudflaps work nice!Found the bumper through AcmeJeepParts.com they are Quadratecs scratch&dent Ebay store.This one was a easy touch-up and I saved alot for other mods!
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Old 09-20-2013, 02:12 AM   #15
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Thank You,got some ideas from the forum and thought some on my own.Many hours looking through catalogs and websites!The bumper and skidplate is by Body Armor 4x4.They also make a rear bumper as well but I like the stock one with the mudflaps.I am in South FL and my offroad is flat,sand and gravel so the mudflaps work nice!Found the bumper through AcmeJeepParts.com they are Quadratecs scratch&dent Ebay store.This one was a easy touch-up and I saved alot for other mods!

Which tire carrier are you using?
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Old 09-20-2013, 10:23 AM   #16
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Quote:
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Her are a few shots of 315/70/17 Duratracs w 2.5"AEV Lift.Also a pic of spare tire setup mentioned in previos post!Hope this helps!
Wheel to height ratio is perfect!

I love the look of your jeep!

I think I'm going to go with a 2.5" lift as well for my jeep....I am considering 3" as my max.

Ultimately, if your Jeep is a weekend warrior is it necessary to change any other parts if you are riding on 2.5-3", and have 33-35 tires? Such as, crank shaft, gears, etc?
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Old 09-20-2013, 11:00 AM   #17
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Which tire carrier are you using?
That's a Teraflex HD Hinged Carrier.
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Old 09-21-2013, 01:03 AM   #18
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That's a Teraflex HD Hinged Carrier.

Would I need that to run 315/70r17 duratracs? Or can I use the smittybilt oversized tire carrier? I'm hesitant to spend $700 on a tire carrier. What other options are available that are good enough to carry a 315/70r17 duratrac?
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Old 09-21-2013, 10:27 AM   #19
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I'm using the Smittybilt oversize tire carrier with my 315's and it seems to be doing the job just fine.
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Old 09-21-2013, 10:29 AM   #20
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Originally Posted by Wharfrat View Post
I am running them with the tera leveling kit, air dam removed and pinch seam trimmed. No problem. Would want flat fenders before I wheel it though.
I have the same configuration and it's fine. But the tires would hit the fenders in any aggressive off road situations.
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Old 09-21-2013, 10:30 AM   #21
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I run Ace all around and love it!
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Old 09-25-2013, 07:34 AM   #22
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"Exposure"?

Quote:
Originally Posted by Area 51 View Post
Her are a few shots of 315/70/17 Duratracs w 2.5"AEV Lift.Also a pic of spare tire setup mentioned in previos post!Hope this helps!
Thanks for these pics as that is a setup I'm considering. I'm thinking 17x9 XD Hoss (4.5" BS) and either 315 or 285 /70 duratracs

Can you tell me how far beyond the fenders the tread is exposed. It is a little hard to tell with the center head on shot.

thanks again,
Mark
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Old 09-25-2013, 09:14 AM   #23
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Can you tell me how far beyond the fenders the tread is exposed. It is a little hard to tell with the center head on shot.
Just far enough to sling stuff all over your jeep on wet or muddy roads...

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Old 09-25-2013, 11:15 AM   #24
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Just far enough to sling stuff all over your jeep on wet or muddy roads...
Is that in inches or centimeters?
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Old 10-18-2014, 10:44 PM   #25
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I'm debated the same thing about 6 months ago and decided to go with the 315's. They measure just a little under 34". I'm so glad I didn't go with the 285 which is basically the same height as stock tire. I also have 3.73 gears and my average MPG (city/hwy) is around 18. My last trip was mostly road miles (back roads running between 45 and 60 mph) and my MPG was 19.5.
Looks great!

After taking the family to Jeeptoberfest, wondering if I should rethink current plan of going with 285/70/17. I walked around with the family looking for examples and besides stock jeeps, I can probably count the 285/70/17s I found on one hand. Seems everybody was 35s or bigger, but I just don't want to go that big on our current stock '14 JKU Auto 3.73.

So now I'm leaning towards 315/70/17 and I guess a 2.5" lift with some correction brackets. What scares me with lifts is the differences I see in various pics and some actually don't look good. It seems some people put in 2.5" lift but end up with 3+" of lift. I'm not changing bumpers or anything else and i really want to get the same look at yours.

Could you post some more pics better showing how far the tires stick out and some more details about your lift like if it uses specific springs or any spacers?

Thanks!
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Old 10-19-2014, 09:20 AM   #26
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happyfirst, my jeep looks pretty much that same as Area 51 pics posted. I have the same Rugged Ridge Wheels and Duratracs. The difference is I'm running the Teraflex JK 2.5" lift kit with Shock Adapters ($450). The shock adapters allow you to use your existing shocks. The actual wheel height (32 psi) mounted measures a little less than 34 inches. If you like your stock look go with the 285. If not, I strongly recommend the 315.

Pictures show the following:
1. How much the wheels extend beyond the fender (front/rear)
2. Shock adapter that allows you to use your existing shocks
3. Air dam that needs to be trimmed.
4. Pinch seam trip. If I'm not mistaking this problem was resolved by the factory on the 2014 and later models.

Note: You can run the 315 on stock rims, but you might need wheel spacers to prevent rubbing. If you go with wheel spacers, I strongly recommend a company like spidertrax that are hub centric

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Old 10-19-2014, 09:25 AM   #27
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happyfirst - I'm using the stock spare tire carrier. The 315 rest perfectly on the rear stock bumper to help eliminate stress on the hinges. I have been running this setup for almost 2 years without any issues.
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Old 10-19-2014, 11:31 AM   #28
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2.5" teraflex coil lift, 315x70x17 duratracs. You will probably need to trim the air damn to keep from rubbing with full steering wheel deflection in either direction
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Old 10-19-2014, 02:56 PM   #29
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I'm not sure how anyone is running 315's at stock height with factory fenders, I ran 33" duratracs for a year with a leveling kit and it rubbed pretty bad off road... Now I run 35" hankooks with 2.5" of lift and they just barely clear, my 315 duratracs for winter are slightly smaller but still...
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Old 10-19-2014, 07:01 PM   #30
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happyfirst, my jeep looks pretty much that same as Area 51 pics posted. I have the same Rugged Ridge Wheels and Duratracs. The difference is I'm running the Teraflex JK 2.5" lift kit with Shock Adapters ($450). The shock adapters allow you to use your existing shocks. The actual wheel height (32 psi) mounted measures a little less than 34 inches. If you like your stock look go with the 285. If not, I strongly recommend the 315.
Thanks for the pics! That looks really nice, they don't seem to stick out to far. I will be going with new rims, so I guess to be safe, I should stick to 17x9x4.5bs rims.

It seems 50/50 on a 315 on the stock spare carrier. Seems for every person that doesn't have an issue, another says they are having issues. I will probably play it safe and install something like that SmittyBuilt or similar.

Now that they've had a taste for some offroading, I could see some "minimal' trail riding in the future probably with a local club. I don't want to risk the 315s rubbing.

I was quite impressed how our stock sahara handled the "stock" course at the event. We went late in the day so I think some spots were probably even worse.

I like how yours and Area51's seem to have just a tiny bit of rake to them still. There is nothing else on the front of your jeep weighing it down? No skids plates?

I have to decide on a lift. Been staring at catalogs for too long now.... I've thought about the teraflex. It also seems like a lot of people like that Rancho 2" budget lift that includes the adjustable 9000 shocks. I wonder if a Rancho 2" budget with add'l 1/2" spacers and some correction brackets would get me back to a stock ride. This jeep is my kids daily driver for now and I want it to ride as close to stock as possible.

thanks again!

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