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295/70r18 on 3.73

 
  #1  
Old 02-05-2019, 08:46 AM
Jhall244
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295/70r18 on 3.73

i have a appointment to have a set of Toyo MT 295/70r18 (34.25x11.5) to be put on my 2016 F-250 6.2 with 3.73. I will be towing my 7000lb toy hauler about 1 weekend a month. Is this gonna kill me to step up from the factory 275/70r18 (33.25x10.75)?

i really didnít think it would be that big of a deal but now that Iím reading some threads Iím wondering if I should call and cancel the order and have something smaller put on
 
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Old 02-05-2019, 09:12 AM
DesertSmoker
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Two options: Get smaller tires or change your gear ratio from 3.73 to 4.56 or 4.88.
 
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Old 02-05-2019, 09:30 AM
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My opinion is stay with 275 70
 
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Old 02-05-2019, 02:20 PM
Jhall244
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Well I cancelled the order. I guess itís back to the drawing board
 
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Old 02-05-2019, 03:17 PM
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So going up 1” larger in diameter and .75” wider will kill the performance of the 6.2? I wouldn’t think that small of a change would impact performance that much.
 
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Old 02-05-2019, 04:34 PM
Jhall244
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Thatís what I thought but the reason I asked the question was because I was being told I was going to regret it
 
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Old 02-05-2019, 04:49 PM
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Iím going to get a price on 285/70r18 Nitto Ridge grapplers. They are about the same size as the largest factory tire on 20Ē wheels ford offers (33.9x11.5). And only weigh 59lbs
 
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Old 02-05-2019, 06:49 PM
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I have 2011 CCB SB 4X4 6.2L that I put 295/70R18s on with 3.73s and tow 11,500 without issue. I like the size, it did hurt my fuel mileage slightly but the truck does ride a little better.. .
 
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Old 02-05-2019, 07:52 PM
Jhall244
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Originally Posted by leadmic View Post
I have 2011 CCB SB 4X4 6.2L that I put 295/70R18s on with 3.73s and tow 11,500 without issue. I like the size, it did hurt my fuel mileage slightly but the truck does ride a little better.. .
does your truck hunt around for gears with or without a trailer. I havenít got a chance to tow with mine yet as I just got it 2 weeks ago. But I will be towing a toy hauler with a gvwr of 7000 more than likely Iíll be loaded between 6-6500lbs but am just saying 7000 because it could be. And donít forget the crap in the bed that could add up.

I have the factory 275/70r18 Michelinís highway tires and Ive got stuck twice with so far (not off-roading). Iíve always had all terrains at the least on all my trucks. And the big wheel well looks like its crying for a bigger tire but I donít want to sacrifice too much performance
 
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Old 02-06-2019, 09:43 AM
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I have the 275/70/18s on my '16, I also have the 3.73s and pull an 8k lb travel trailer, just not as often as you. No way I'd put a bigger tire on mine without re-gearing. I had the 245/70/17s from the factory, going up to the 275s made a noticeable loss in performance on mine. I plan on a regear at some point
 
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Old 02-06-2019, 01:01 PM
leadmic
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Originally Posted by Jhall244 View Post


does your truck hunt around for gears with or without a trailer. I havenít got a chance to tow with mine yet as I just got it 2 weeks ago. But I will be towing a toy hauler with a gvwr of 7000 more than likely Iíll be loaded between 6-6500lbs but am just saying 7000 because it could be. And donít forget the crap in the bed that could add up.

I have the factory 275/70r18 Michelinís highway tires and Ive got stuck twice with so far (not off-roading). Iíve always had all terrains at the least on all my trucks. And the big wheel well looks like its crying for a bigger tire but I donít want to sacrifice too much performance
I can't tell much difference in performance .It shifts like it did with the smaller tires, no hunting for gears .I do lock 6th gear out when I tow.
 
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Old 03-15-2019, 01:38 PM
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Jhall244:Did you end up getting 285/70R18 tires? I too have been looking at a 285/70R18 tire size. This tire is shown with an “approved rim width” of 7.5 to 9.5 with the “measured width” being 8.5”. My stock rims are 8.0” wide, i.e. .5 inch narrower then the measured rim width. I have checked with several tire manufacturers and suppliers as to what issues, if any, I might have using this size tire being mounted on a rim that is .5 inch narrower, i.e. increase wear in the edges, steering / tracking, etc, but have not been able to get a straight answer. I do carry a truck camper and am close to my max GVWR, but below my axles GAWR.
 
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Old 03-17-2019, 08:36 PM
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I just put on some 295 75 16's Nitto Grapplers on my F250 and I've definitely noticed a difference. It's a little sluggish and not as responsive as it used to be. Also the mpg seems to have gone down, I'll know better when I fill up this week. But I love the look, I have a 2wd with the front leveled and it really looks aggressive.
My son in law is a mechanic and he said he can re-gear it for me, I'll have to do some research on what's best for me.
 
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Old 03-18-2019, 10:04 AM
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If 1" inch is going to kill your performance, you need a new truck. I run 37's" on my 7.3.
 
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Old 03-18-2019, 10:13 AM
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[QUOTE=DesertSmoker;18462451]Two options: Get smaller tires or change your gear ratio from 3.73 to 4.56 or 4.88.

Gear ratio calculator says 3.85 gear ratio corrects difference. Not 4.56 or 4.88 (of course 3.85 doesn't exist).
Not enough of a difference to worry about.
 

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