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Old 11-21-2013, 12:42 PM   #1
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Duratracs--33x12.50-15 vs 285/70R17

I've been back and forth on what wheel/tire combo I want. I've settled on Duratracs in one of two sizes. I'm looking at 285/70R17 or 33x12.50-15.

I saw a JKU yesterday with the 285s and really liked the look, which brings me to my question...what are the actual measurements for the two sizes I'm looking at? I realize that in theory the 33" will be about 3/10 of an inch taller (which would be pretty much imperceptible). If the 285 runs true to size, though, and the 33" is on the smaller side, there could be a pretty big difference.

The 285s are significantly more expensive (when combined with the wheels). I want that look, though. My hope is that I can accomplish that with the 33s at a lower price point.

Also, I do realize that the 33s will be significantly wider.

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Old 11-21-2013, 08:44 PM   #2
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285/70/17 is 32.9 tall--11.3 in width

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Old 11-21-2013, 09:02 PM   #3
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I take it you are looking at 15" steel wheels for the 15" tire size? I want to warn you that most 15" steel wheels will not fit the JK. You would be better off going with a 16" if going with steel.
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Old 11-21-2013, 09:14 PM   #4
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I take it you are looking at 15" steel wheels for the 15" tire size? I want to warn you that most 15" steel wheels will not fit the JK. You would be better off going with a 16" if going with steel.
No...I'll be going with alloys from Discount that have been confirmed to work on the JK.
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Old 11-21-2013, 10:03 PM   #5
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Originally Posted by Annhl8rX View Post
I've been back and forth on what wheel/tire combo I want. I've settled on Duratracs in one of two sizes. I'm looking at 285/70R17 or 33x12.50-15. I saw a JKU yesterday with the 285s and really liked the look, which brings me to my question...what are the actual measurements for the two sizes I'm looking at? I realize that in theory the 33" will be about 3/10 of an inch taller (which would be pretty much imperceptible). If the 285 runs true to size, though, and the 33" is on the smaller side, there could be a pretty big difference. The 285s are significantly more expensive (when combined with the wheels). I want that look, though. My hope is that I can accomplish that with the 33s at a lower price point. Also, I do realize that the 33s will be significantly wider.
I was debating the same thing recently. I went with the 285/70/17 Duratracs as every spec sheet I looked at said they were like 32.8 inches tall. They run small. Miine measure 32.5 tall. I'm happy with them and glad I chose them over "The Combo" but wish they ran truer to size. I wanted a true 33 but I don't guess .25 inch on top and bottom is gonna kill me. I went from stock rubicon wheels to the 285/70/17 Duratracs on Pro Comp 7069 alloy wheels. My speedo is about +- 1mph fast now. And yes, they were considerably more then 15 inch tires. The 4.75 backspacing and wider tires make a huge difference.



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Old 11-21-2013, 10:10 PM   #6
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Go with hancook dynapro m/t's I love mine awesom traction
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Old 11-22-2013, 12:30 AM   #7
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I love my 15 inch steelies and 33x12.50 duratracs!
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Old 11-22-2013, 12:45 AM   #8
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The biggest thing that comes to mind is going to be rate difference. The 33x12.50x15 will be a "C" while the 285's will be a "D". I ran the 33's on my TJ and thought they were a bit floaty and soft, good for bumpy roads, good for offroad, bad for cornering on turns. I can't imagine using them with a heavier vehicle, so if it's a JKU I'd look at the 285's more, the JK would be ok probably, I still think I'd prefer a D rated tire though.
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Old 11-22-2013, 01:09 AM   #9
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Originally Posted by Lusus_Naturae View Post
The biggest thing that comes to mind is going to be rate difference. The 33x12.50x15 will be a "C" while the 285's will be a "D". I ran the 33's on my TJ and thought they were a bit floaty and soft, good for bumpy roads, good for offroad, bad for cornering on turns. I can't imagine using them with a heavier vehicle, so if it's a JKU I'd look at the 285's more, the JK would be ok probably, I still think I'd prefer a D rated tire though.

that there is good advice - not something a lot of folks would have thought to consider.
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Old 11-22-2013, 06:08 AM   #10
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I went with the 285 Duratracs because I wanted to keep my wheels within my flares a little more. The 12.5" wide tires would stick out too much for my liking.
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Old 11-22-2013, 08:45 AM   #11
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Originally Posted by Lusus_Naturae View Post
The biggest thing that comes to mind is going to be rate difference. The 33x12.50x15 will be a "C" while the 285's will be a "D". I ran the 33's on my TJ and thought they were a bit floaty and soft, good for bumpy roads, good for offroad, bad for cornering on turns. I can't imagine using them with a heavier vehicle, so if it's a JKU I'd look at the 285's more, the JK would be ok probably, I still think I'd prefer a D rated tire though.
Jeep JK and JKUs are light vehicles, D and E rated tires are for 3/4 and 1 ton trucks, capability wise a C or P rated tire is more then enough for any Wrangler, if you prefer a stiffer ride and heavier tire then choose the D or E but there is nothing capacity wise that warrants it.
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Old 11-22-2013, 09:32 AM   #12
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I was debating the same thing recently. I went with the 285/70/17 Duratracs as every spec sheet I looked at said they were like 32.8 inches tall. They run small. Miine measure 32.5 tall. I'm happy with them and glad I chose them over "The Combo" but wish they ran truer to size. I wanted a true 33 but I don't guess .25 inch on top and bottom is gonna kill me. I went from stock rubicon wheels to the 285/70/17 Duratracs on Pro Comp 7069 alloy wheels. My speedo is about +- 1mph fast now. And yes, they were considerably more then 15 inch tires. The 4.75 backspacing and wider tires make a huge difference.
There's half of what I was looking for...an actual measurement on the 285s. Anybody have one for the 33s?
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Old 11-22-2013, 10:15 AM   #13
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There's half of what I was looking for...an actual measurement on the 285s. Anybody have one for the 33s?
Go to tirerack.com and look at the specs for the Duratracs. They list all the sizes available and give you the true dimensions in inches. I believe the 33x12.5s run true to that actual size.

If you do choose to go with the 33x12.5s, make sure that a) your wheels have enough backspacing to prevent rubbing and b) your tires sticking out beyond the flares is allowable in your state. My 285/70/17 Duratracs stick out about 1/4-1/2" beyond my flares but in Mass, I'm allowed a little bit of wiggle room. That and the fact that the actual tread is covered by the flare and the only thing sticking out is a touch of sidewall. I'm running iON alloys on there. I'll post up some pics in a bit.
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Old 11-22-2013, 12:38 PM   #14
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As promised
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Old 11-22-2013, 03:43 PM   #15
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The 33x12.5x15 Duratracs run very small. Mine measure (from the ground) to right at 32" if not a little less. I was a little disappointed by that, but they look great. The ride is nice and actually quite a bit softer than the factory 255/75/17 Goodyears that were on it previously. To be honest they are just about the same height as those tires, but much wider. It gives the appearance of a larger tire.

I went with the 33's because the cost was much cheaper, and it meant I didn't have to run spacers with the factory wheels. Tires plus spacers for the factory wheels would have been hundreds more than the 15" combo I got. the 15" wheels also lend themselves to a more "old school" look, and looks great on the Jeep. The tires are more ballooned than square. On the 285/75/17 it has a nice squared off edge and flat sidewall. Mine are more round in every way. It's personal preference but I don't like the square tire look as much. In the end it comes down to what you want, and what you can afford. I couldn't afford the 17's, and I didn't want to run spacers. So the 15's made sense, and it allowed me to change the wheel style to something different. Win/Win for me.



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Old 11-22-2013, 03:45 PM   #16
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Here's one more pic that shows how far they stick out past the fenders. Honestly I would like it if they didn't stick out quite this much, but it does look pretty cool. 15x8 wheel 4" backspace.

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Old 11-22-2013, 03:59 PM   #17
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Espo- I dig your rig, there is something retro ubber cool about those white steel rims, simple yet definitely unique.

Nice vision!
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Old 11-22-2013, 04:14 PM   #18
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Thank you! I had some doubts right up until the point that they were bolted on the Jeep. Then I knew I made the right choice. They are also the easiest wheels I've ever cleaned.
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Old 11-22-2013, 08:46 PM   #19
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Thanks for the info and pics, folks. I'm still not sure which way I'll go, but it really doesn't matter until I get my Jeep back from the body shop anyway.
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Old 11-22-2013, 11:28 PM   #20
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I'm running 33x12.50 Duratrac's and couldn't be happier with them. Not too loud, great off-road, decent on-road. Wheels are 15" MB Designs 72's that came with the rig when I bought it.

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Old 11-23-2013, 03:26 AM   #21
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Quote:
Originally Posted by MacCTD View Post
Jeep JK and JKUs are light vehicles, D and E rated tires are for 3/4 and 1 ton trucks, capability wise a C or P rated tire is more then enough for any Wrangler, if you prefer a stiffer ride and heavier tire then choose the D or E but there is nothing capacity wise that warrants it.
The stock tires on a JK and JKU are a 'D' rated tire.
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Old 11-23-2013, 04:00 AM   #22
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^ Stupid computer, I was working on that post and hit enter or something, then I thought I was editing it and ended up posting this post separately.

Quote:
Originally Posted by MacCTD View Post
Jeep JK and JKUs are light vehicles, D and E rated tires are for 3/4 and 1 ton trucks, capability wise a C or P rated tire is more then enough for any Wrangler, if you prefer a stiffer ride and heavier tire then choose the D or E but there is nothing capacity wise that warrants it.
The stock tires on a JK and JKU are .7 smaller than a 285.70.17 Duratrac by manufacturer spec. In real life it's hardy noticeable. The Duratrac listed here is a "D" rated tire.

Capacity wise it may not be needed for a street Jeep, however, performance wise there is a big difference that can be felt. Even using a near stock sized tire in a 'D' rating you will feel a firmer cornering response. The tire also is a bit softer on road, and running at 30 psi, it has a nice feel to it.

The biggest issue I have has to do with debris on roads. I ran over a tar paper with a nail on the highway when I was completely stock. I got the TPMS warning, and watched as the psi quickly dropped from my tire. I was 1/4 mile from the exit and another city block from a safe area to pull over. I made it, barely, and I was going as fast as I could safely. The nail was firmly in the tire, but the stock tire is a high pressure tire and air was aggressively being forced out around the nail.

I put on 315.75.16 Duratracs (E rated). I caught a nail when doing search and rescue after the Moore tornado in May right at the end of my round. I heard the crunch of the wood and had a feeling I got one, and I checked it right away, it was stuck in good in about the same area as the nail I had on the highway just inside the shoulder lug. I couldn't hear air being forced out, and TPMS wasn't going off. I drove another couple miles of patrol area that night, dropped some people off at their relatives, and went home. The next morning it was down to 27 psi from 30. I drove to get it fixed. It was leaking, just slow.

This has been what I've found over many years of driving flotation tires over passenger tires. Now maybe someone can explain better why this occurs, I just know real life experience, and I'd much rather have a tire I can drive on longer and safer.

Yes, this would include a 'C' rated tire, however, I know from using a 'C' rated tire on the TJ, I can only say it was a bit like driving on basketballs, it took getting used to, and that's even compared to the stock tires. The 'D' rated Duratracs are much more comparable in feel to the stock tire.
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Old 11-23-2013, 04:22 AM   #23
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I'm running 33x12.50 Duratrac's and couldn't be happier with them. Not too loud, great off-road, decent on-road. Wheels are 15" MB Designs 72's that came with the rig when I bought it.

That looks so good on a two door. I do wonder a bit if you can feel the roll when cornering, or if the stability control in the JK has over-riden that feeling.

It could have been more of a factor in my lifted TJ than it would be for the stock JK.
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Old 11-24-2013, 09:58 AM   #24
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That looks so good on a two door. I do wonder a bit if you can feel the roll when cornering, or if the stability control in the JK has over-riden that feeling.

It could have been more of a factor in my lifted TJ than it would be for the stock JK.
It's definitely a little bit floaty when cornering. I can't say for sure if that's because of the tires though. This is my first Jeep, and the tires and wheels were already on it when I bought it. It feels very tippy compared to my previous car, but that was a lowered Audi A4. Apples and oranges!

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