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Old November 1st, 2011, 03:59 PM   #1
JoshG
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Default 255/85r16 tires on a suburban

One tire dealer said these tires "definately" will not fit on a 1998 3/4 ton 4x4 diesel suburban...

I'm sure I've seen guys fit 285's on trucks before and the 255's are narrower.

The stock tires are 245/75r16's and just look small, not to mention whoever I bought it from put load range "c" tires...they are wearing out very quickly.

I've considered 235/85r16's and 265/75r16's...which tire would look best and go best with my diesel with 4.10 gears?

I really want the tall skinny look of the 255, but everyone around has to special order them. Anyone have these tires on that era Chevy or GMC truck to prove that it can't be done?

Or maybe does someone have a set that I can bolt on my truck and drive around the block to see how they work.
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Old November 1st, 2011, 06:06 PM   #2
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http://www.treadepot.com/tirelist.ht...ckfind=2358516

http://www.treadepot.com/tirelist.ht...ckfind=2857516

I think your confused on the tall skinny issue. the first link takes you to the "Other" tire available on the 4x2 3/4 ton burbs. its the load range E and will in most cases fit your rig.

without a lift kit I would find it hard to put bigger tires then a 265/75-16 but the second link if for 285/75-16. they are still tall but not so high as to prevent fitting under your truck. the 285's may rub when turning if the truck sits low.

one of the bad things about really tall is very poor handling if the side wall isn't strong enough. you can roll a tire off the rim on a truck that steers poorly


here's a link that may help.

http://vexer.com/automotive-tools/speed-rpm-calculator

use this to figure out what the right size would be? if the rpms at cruising speeds are more then your rig can take then add tire height.
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Old November 1st, 2011, 07:04 PM   #3
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255's are narrower than a 285 and about the same height 33"

255's are generally D or E rated, one of them has a 3-ply sidewall...Maxxis Bravo 762...they should have pretty strong sidewalls.

I'm aware that my rpm's will potentially go down, but some people speak about "rolling resistance" of a tire. However, my current tires weight 46 pounds each and 235/85r16's weight 47 pounds and 255's weight 52 pounds. Not that big of a deal.

With 245/75r16 at 65 mph I am 2200 rpm's...still, if I'm careful I can get 19mpg. I would like to get some more...I was hoping tall and skinny was the answer. Just need to find out if someone knows for sure if they will fit.
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Old November 1st, 2011, 07:18 PM   #4
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the 255s will fit fine, go with 265s, they were an option tire on 88-98s and fit perfectally.

your getting to technical with all this "rolling distance" and "tire weight", your only gonna get a difference if you going from say 31s to 35s and up. just go with 265/75-R16, nice size tire, very common and easy to find vs 255/85-R16.

Your not gonna get much better than 19 mpg with a 3/4 diesel just with tires. Go simple

Edit: I had a 95 3/4 burb with 265s, rpms sat right at 2 grand at 60, still got 15/16 mpg with 4.10s. it was also a 5.7L lol
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Old November 1st, 2011, 08:33 PM   #5
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I just put a set of 285 75 16's on my 94 3/4 ton diesel burb. I also have 4/1 gears, the upsize from the stock tires dropped me about 200 rpm. I used 2 inch blocks in the rear and tweaked the torsion bars. My particular combo doesn't rub, and the extra rubber looks much more correct to me.
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Old November 2nd, 2011, 07:42 AM   #6
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Thanks guys for some opinions!

I had a 94 GMC that I put 265's I know they fit fine and look much better than the stock 245's; I just wanted the 255/85r16's because they are so much taller; but I definately do not want 285's
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Old November 2nd, 2011, 08:05 AM   #7
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my 2000 has 255-85's on it, and I love them minus the fact that they're only a D range.

mine will rub once in a great while. I've had them on for 3 years and they've rubbed twice, when in a sharp turn and hitting a deep pothole.

k3500 with 255-85s. no torsion bar adjustment.
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Old November 2nd, 2011, 08:19 AM   #8
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The toyo M55 also has a 3 ply sidewall. My cousin put them on his duramax and is very happy with them.
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Old November 2nd, 2011, 11:47 AM   #9
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Quote:
Originally Posted by Klumpper View Post
The toyo M55 also has a 3 ply sidewall. My cousin put them on his duramax and is very happy with them.
Thanks! This is exactly what I was looking for...those are the same wheels I have on my burb too.

Those Toyo M55's look nice, but they are over or around $300 each.

The Maxxis Bravo 762's also are 3 ply sidewall...2 steel, 1 nylon...I found them for $180 each onlinetires.com I believe. The tread isn't even close to as aggressive as others, but I like the idea.

The only tires I could find in load range E were Toyo m55 and their other off-road tire and BFG km2's...the rest, Cooper, Maxxis, and some other brands were all load range D.
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Old November 4th, 2011, 08:09 AM   #10
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Yup, the coopers shown there are D range, but i've had no issues with them, even when dragging my Unimog around. Same load rating as stock 245s, just with lower air pressure (65lbs). I've only felt the tires complain about weight when I had firewood 18" over the cab to the end of the tailgate, but they were at 35lbs, and i was staying in the yard.

Ride quality is something to consider between D and E range. I really need to air down my 265s to keep it from bouncing off our beautiful michigan roads when unloaded, but the coopers I typically leave around 50lbs(40ish in the winter) unless I'm moving something big.
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Old November 4th, 2011, 09:58 AM   #11
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Load range C tires I've normally kept at 35psi...maybe I'm way off! My z71 had C tires and wore for over 50,000 miles and still had lots of tread and kept them at 35psi.

I am definately considering purchasing the 255's now.
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Old July 26th, 2013, 07:55 PM   #12
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Almost 2 years later and I finally saved up enough money to upgrade to 255/85r16 tires...they are a 33.5" tire and really barely fit under my suburban. The front tires rubbed the mud flaps. I took them off right in the tire shop.

Truck is getting a front end alignment now...I'll try to post pictures when I get it back.
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