New Cooper STT's 285's - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 45 (permalink) Old 07-03-2009, 12:57 PM Thread Starter
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New Cooper STT's 285's

Got them on last night. I had 245's for a bit under 44K miles. I stepped up to 285's this time. I got 2" spacers coming in the mail for the rear.
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-Wayne
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post #2 of 45 (permalink) Old 07-03-2009, 01:12 PM
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Are 315's next? They'll fit without a lift.
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post #3 of 45 (permalink) Old 07-03-2009, 01:22 PM Thread Starter
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No, not going to go any bigger, unless I get a lift. These do not rub in the front, but I can't see how anything bigger won't. The truck ahs a 2.5" leveling kit on the front too.

If it crushes my fuel mileage, I will probably go back to 245's. 285 STT's are not hard to get rid of here in FL.

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post #4 of 45 (permalink) Old 07-03-2009, 02:22 PM
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Wayne looks good. Why would the 285's hurt your mileage.

I want to put on 315's thinking it was gonna help me. My truck gets great mileage if I keep it under 2000RPM.

I was thinking the larger tire might drop me enough to run under 2000RPM at 65MPH

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post #5 of 45 (permalink) Old 07-03-2009, 02:29 PM Thread Starter
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I mostly drive around town now, so it takes a bit more to get them rolling, even though they are only slightly bigger. I am sure once on the hiway it will help a bit. I will see how it goes, and report my findings.

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post #6 of 45 (permalink) Old 07-03-2009, 02:36 PM
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I didn't notice a difference going from 245's to 285's in mileage or driveability. Now that I went to 315's there is a big difference in driveability, mileage is still the same though. With the leveling kit I have and the wheels I chose there was some rubbing. That took about 2 hours to get the wheels to clear at full stuff. Just a little cutting, grinding and banging. It's been over a month and the wife hasn't even noticed the trim job yet.
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post #7 of 45 (permalink) Old 07-03-2009, 02:58 PM Thread Starter
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That's good to hear. I can't wait to get the spacers in and installed. We had to delfate the outside tire to get it on the studs.

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post #8 of 45 (permalink) Old 07-03-2009, 03:48 PM
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Get longer studs, if it works for nascar...
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post #9 of 45 (permalink) Old 07-04-2009, 07:32 PM
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Looking good Wayne

01 2500 Duramax/ZF6,returned to daily driver590/995
03 3500 Duramax/Ally S/C IV EFI Live {Brothers truck}
04 3500 Duramax/Ally EFI Live,feed truck with 3 bale Hydra-Bed,very sick trans
06 4500 Duramax/Ally 4x4 Monroe,EFI Live,Danville turbo, CM flatbed
11 2500 Duramax/Ally 4x4 H&S tuned and deleted {GF's truck}
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Some Green Equipment and a heard of Black Angus cows
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post #10 of 45 (permalink) Old 07-06-2009, 04:07 PM
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Wayne, Eric

The tires I wanted to get, Goodyear Wrangler DuraTrac have some bad reviews about the sidewall not being stiff enough. What is your opinion on your STT's



Initial Review, 3,000 Miles on Tires
June 27, 2009

Do not buy if you have a big heavy vehicle. Corner stability is poor. The truck wants to heel in the oposite direction of the turn at higher speeds. Feels like rolling on basketballs. I've had 4 sets of different brands on my truck, but these were the poorest choice by far. Looked great but handle like thin cheap tires with no sidewall strength. Got different brand and now stability is back and I feel safer. Might work on little cars like Jeeps, but not big trucks.




Initial Review, 1,800 Miles on Tires
May 27, 2009

There was not any info or reviews when I purchased these tires. Fairly happy so far however I do have a lot a tire rollover when I corner. I have since learned that they do not have the best carcus on this tire for use on a 1 ton truck. I think for use on a 1/2 ton or SUV they would be great. I do get good traction in mud and gravel. Great on the farm at slow speeds just a little concearned about curvy highway and backroads. Good overall tire I believe. Hope to get good milage out of them.
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