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Discussion Starter · #1 ·
I am in the process of deciding what tire to buy, I know there are a few out there now, what are people using? I would also like to know if there is anybody that has used this tire and what they think of it. It is the Goodyear Wrangler SilentArmor 275/70/R18 E rated.I do not want to get the continental ever again!

Thanks
 

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I have the 245/75/16 on my work truck. The factory firestones were better. I only have aproximately 15k on them and they are more than half way through. I have also gotten stuck in light mud due to that they cake up with mud very easily. I can't remember having many issues in the snow, but there was not any deep snow around me this year. The factory firestones lasted 60k without any issues. on the plus side of the Good year is that they look aggressive.
 

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[ QUOTE ]
275/75/R18 E rated.

[/ QUOTE ]

I don't see that size on the GoodYear website. They have an LT275/70R18E, but not the LT275/75R18E. Click here.

Assuming your F-350 has single rear wheels, then the stock tires were 275/70R18E with 626 tire revs/mile.

A close match is the BFGoodrich AllTerrain in size 285/65R18E with 636 revs/mile. That's about 1.5 percent difference in engine revs and speedo error, or about 1 MPH at highway speeds. (The 275/70s are slightly taller than the 285/65s).
 

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SmokeyWren

All the calculators i have used on the internet say the stock 275/70R18E tires have a Rev per mile of 607.49.

How did you get 626?
 

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Discussion Starter · #6 ·
Sorry Smokey, I have edited my post, it should have read 275/70/R18.
 

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[ QUOTE ]
All the calculators i have used on the internet say the stock 275/70R18E tires have a Rev per mile of 607.49.

How did you get 626?

[/ QUOTE ]

Ford Truck Source Book

Or you can usually get it directly from the tire manufacturer. BFGoodrich includes tire revs/mile in their specs. But Goodyear doesn't.

Or a back door is to get it from tirerack.com

Click here then click on "specs" for the tire you want. Note the tire revs/mile for LT275/70R18E is:

Wrangler = 630
Michelin = 627
Conti = 628

(Make mine the new Michelin LTX A/T. Expensive, but I'm worth it.) /ubbthreads/images/graemlins/cool.gif

Tire size calculators assume the numbers on the sidewall are exact. But they're not. They're not exactly 275mm wide or 70 percent profile. So if you need accuracy, use the manufacturer's revs/mile instead of a generic calculator.

You can use a generic calculator to get in the ball park, for example to compare the revs/mile of different sized tires. But if you want it accurate enough to, say, calibrate the speedo, then you need the actual.

After you have the new tires on your truck, you can calculate your actual revs/mile with a GPS or by using interstate highway mile markers. Set the odo to zero with your front bumper even with a mile marker. Then drive 10 miles down the highway to another mile marker. Every tenth of a mile off from 10.0 miles is a one percent speedo error. If you want closer than one percent slush, then go 100 miles instead of only 10 miles. My speedo is now 99.07 percent accurate = three tenths of a mile error in 100 miles. /ubbthreads/images/graemlins/warmsmile.gif

Be sure the mile markers you choose are not near an entry, exit, overpass, or underpass. If the highway crew can place the marker where it belongs, they will. But if not, they put it close. And close is not close enough for me. /ubbthreads/images/graemlins/shocked.gif

The generic calculators all said my LT295/75R16 tires were less than 610 revs/mile. But the 100-mile highway test showed they were actually 626. And the manufacturer's specs now show 626. /ubbthreads/images/graemlins/warmsmile.gif
 

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Discussion Starter · #8 ·
[quote(Make mine the new Michelin LTX A/T. Expensive, but I'm worth it.)

[/ QUOTE ]

I understand that these tires are not out in this size and rating until the end of the month, unfortunately I can't wait till then, I hook the 5er up this weekend.
 

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Discussion Starter · #9 ·
What are people using to replace the OEM tires with, I thought for sure that someone would have used the Goodyear Wrangler SilentArmor in size 275/70/R18 E rated by now.
/ubbthreads/images/graemlins/shrug.gif
 

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On my work truck, I put on cooper atrs. Tons mor traction than the continentals. Only downside, so far, is they like to throw lots of small rocks.
 

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Cooper Discoverer ATR is a good tire. And yep, they make them in your size.
Click here.
 

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I run the Silent Armor Pro Grade 325/60R18 Load Range E on my 2007 F-350.
Love the tires great traction in the rain and snow....have over 7000 miles on them and they still look like new.
It was pouring rain yesterday (1"+ of water running down all the streets, etc..) and they offered great traction even when hitting the bigger puddles of water that would shoot the water over the roof of the truck.

I pulled the stock continentals with 350 miles on the truck...they sucked and picked up lots of rocks. The Goodyears are waaaaayyyy better and don't pick up nearly as many rocks.


I also have the Silent Armor 275/70R17 on my 99 F-150....over 20,000 miles on them and they still look almost new too.


I make sure to keep the correct psi in them and rotate them regularly.

I've always had great luck with Goodyear tires.
 
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