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Discussion Starter · #1 ·
Time for new rubbers. I'm currently running LT275 70 18 (E) General Grabber AT2. Looking to switch over to LT285 65 18 (E) Cooper Discoverer AT3. They get rave reviews all over and are a bit more pavement friendly than the Grabbers. (Keep in mind cost and tire weight aren't too big of an issue to me).

Anyone else running the Coops in 285 65 18? Thoughts/complaints on MPG, fit, wear, etc?? My ride info....2007 Silvy Z-71 with 2.25 inch BMF level in front, Norcal small mod, XD Addict 18x9 +18 offset. K&N FIPK kit.

I went hands on with Coopers (buddy works in a tire warehouse) and found some interesting info
LT265 70 18....32x8.75 weighing in at 48lbs. Coop site says 32.64x8.62 at 54lbs.
LT275 65 18....32x9 at 50lbs. Coop site says 32.09x8.9 at 51lbs.
LT285 65 18....32.375x9.5 at 53 lbs. Coop site says 32.56x9.41 at 56lbs.
Keep in mind these are just rubber, not mounted or anything. The dimension figures will change once mounted, but I found the weight difference interesting. For comparison new 275 70 Grabbers are 57.5 lbs. each.

I originally wanted 265 70s (I want height over width) but measuring off hand the 285s were a bit taller so I'm leaning towards those.
 

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I'm very satisfied with my Cooper AT3s, granted I only have about 4k miles on them. I'm running 285/65/18 10plys.

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I'm really leaning to that size. That is until I found out the cost.........
265 70 18 $853 (177 ea)
275 65 18 $935 (197 ea)
285 65 18 $1263 (271 ea)
Those are installed prices mind you, and I know I said price wasn't much of an issue but wow....my Grabbers were $220 each back in '13. I did manage to score a pic of 3 sizes I looked at.......

20161107_170851.jpg
 

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I traded my stock tires in at my local tire shop for $500, plus Cooper had a 100 dollar rebate so I paid 400 for mine.

I really don't think you should notice much of a difference between the 275s and 285s.

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Discussion Starter · #5 ·
Ok so I called the local Discount Tire and they quoted me much cheaper than the other area shops. So I ordered 285 65s. Should be done on monday or Tuesday. Before and after pics to follow.
 

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Got the new rubbers on yesterday. HUGE difference in road feel now (that's a good thing). Before when rolling highway speeds if you hit a road hazard (bump/divot) it was like the tires hit, then the rest of the suspension delayed about 3/4 of a second which made the truck feel like it hit the bump twice. Now its one bump and done, I'd assume its due to the lower side wall of the 285s.

The handling feels sportier than it did and I noticed it running about 500 rpm lower at 70mph (right at 2k) which should help MPGs in the long run. The steering wheel shimmy that existed since day 1 with the 275s is now gone as well. Wish I would have done this 3 years ago. And I only lost less than .25 ground clearance, big deal.

The overall looks changed as well, the wheel wells look a bit emptier, but the tires look more proportionate for the rims. IMO it makes the truck look taller. Pics.......

Before
20161111_083125.jpg

After
20161114_223130.jpg

Comparison of the 3
20161115_212012.jpg

20161114_223140.jpg
 

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