275/70/18 - Chevy and GMC Duramax Diesel Forum
2011+ LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 10-30-2011, 04:14 PM   eBay Motors  #1 (permalink)
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275/70/18

I'm currently in the market for Snow tires for a 2011 2500HD LTZ 18in wheels. Not alot of options for the OEM 265/70/18, but I see that Ford and many others use 275/65/18 or 275/70/18's on new option upgrades. I'm looking at 275/70/18 E's Cooper Discoverer M/S studded which I have ran previously on half tons. I like the Nokian Hakka LT's but can't go that direction without 17's.
--Does anyone have 275/70/18's on a 2011 2500HD I could see pictures of, any info with rub isssues etc... Thanks
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Old 10-31-2011, 08:31 AM   eBay Motors  #2 (permalink)
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I've got LT275/70R18 Open Country A/T's on my LML. They're not on stock wheels, but the wheels are the same width and offset as stock. They rub a little on the splash guard/mud flap in full right-lock turns occasionally. If I trimmed the inside edge of the flap a little, it probably wouldn't rub any more.
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Old 11-01-2011, 04:34 PM   eBay Motors  #3 (permalink)
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Stock rims , LT 285/65r18E 10 ply same as stock height but an inch wider. BFG All Terrain KO2. Not the best hiway tire ,but good for logging roads and snow, light mud. Has the snowflake rating for the new winter tire laws here in the north.

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Old 11-01-2011, 06:59 PM   eBay Motors  #4 (permalink)
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From another posting:


One option that would be a match to the stock tire as far as tire diameter is a 285-65-18. Tire rack shows a few available in this size.

What would be nice about that size, is that there would be no need for reprogramming the truck, as both that size and stock size are 32.6" in diameter.

Another option would be to go to a bigger, more popular tire size. We had a customer who bought a 2011 HD with the 18's ask about bigger tires. I told him about a 275/70/18 but that would be bigger than stock (32.6" versus 33.2") and give a 1.7% difference in speed. The plus side to this size, is that availability of tires is much more vast. Tire Rack lists 24 E load tires.

Interestingly, Ford uses this size on Super Duty if I recall, and makes me wonder why GM didnt.

So...to simplify...If you would like to go slightly bigger and have more variety, go for 275/70/18. If you see what you like in a matching diameter tire, then try 285/65/18.
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Old 11-01-2011, 09:39 PM   eBay Motors  #5 (permalink)
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Quote:
Originally Posted by DENALI HD3500 View Post
Stock rims , LT 285/65r18E 10 ply same as stock height but an inch wider. BFG All Terrain KO2. Not the best hiway tire ,but good for logging roads and snow, light mud. Has the snowflake rating for the new winter tire laws here in the north.

Denali HD3500, any issues with rubbing in that size. I am thinking about going to the exact same size when my stock michelins wear out. Also, did you detect any mileage loss when going to the slightly wider tire? Thanks
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Old 11-01-2011, 10:24 PM   eBay Motors  #6 (permalink)
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Denali HD3500, any issues with rubbing in that size. I am thinking about going to the exact same size when my stock michelins wear out. Also, did you detect any mileage loss when going to the slightly wider tire? Thanks
These size changes are so negligible that any mileage loss would be unnoticeable. A 2" increase or more in tire Height, width, or both is when you will really notice mileage decrease.
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Old 11-02-2011, 11:51 AM   eBay Motors  #7 (permalink)
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Denali HD3500, any issues with rubbing in that size. I am thinking about going to the exact same size when my stock michelins wear out. Also, did you detect any mileage loss when going to the slightly wider tire? Thanks
No rub anywhere, no MPG change.
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Old 11-02-2011, 03:45 PM   eBay Motors  #8 (permalink)
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Thanks for the input I located the 275/70/18 E's, and the 285/65/18 E's in the Firestone Winterforce LT's and Cooper Discoverer M/S.
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Old 11-10-2011, 10:19 PM   eBay Motors  #9 (permalink)
 
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Thanks for the input I located the 275/70/18 E's, and the 285/65/18 E's in the Firestone Winterforce LT's and Cooper Discoverer M/S.
I have the Coopers on my 2011 GMC LML same size as you are thinking about. Barley a rub when cranked left - zero rub cranked right. On the left the e brake cable is behind the plastic fender well and pushes it out some.Good tires I have 1000 miles on them great in mud and wet. No real snow yet here in Utah. I ran Blizzacks on 17 inch last year love those tires.
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