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Old 09-26-2014, 09:52 PM   #1
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taller tires ???

I have 265/70/17 P rated tires that I'm going to replace with some LT tires ,
would taller tire's tow better like 275 or 285 ?

Thank you
mike
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Old 09-26-2014, 11:06 PM   #2
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Taller tires have no advantage, and in reality are a disadvantage. The axle ratio and tire size have a direct correlation.

I increased my tires from 245/75 to 265/75 which was about a 3-4% increase in circumference and that increase essentially decreased the final drive. There for my 3:73 doesn't have as much pulling power as before.

Now 3-4% isn't enough to be concerned about with a Duramax, but the point a taller than OEM tires have a negative affect on performance.
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Old 09-27-2014, 03:36 AM   #3
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Stay with stock sized tires.As Clubhouse stated,the gear ratio will change with taller tires.Your trucks driveline components were designed with stock size in mind.Cant remember what size tires I ran on a 97 dodge 2500.I went up one tire size and promptly(within 25000 miles)burnt up 2 transmissions.The trans rebuild shop stated it was probably from the taller tires not letting the transmission operate in the rpm range it was designed for.For my money stay with the size tires posted on a placard on your truck somewhere.Not worth the risk.Scott.
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Old 09-27-2014, 04:45 AM   #4
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Don't try to out engineer the manufacter .You see people doing all the time to get more horse power , which is easy to out do the factory , what they don't see is that it wont last anywhere as long after they out smart the big money engineers .
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Old 09-27-2014, 05:36 AM   #5
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Thank you , I will be staying stock size
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Old 09-27-2014, 06:01 AM   #6
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Most every truck manufacturer offers multiple wheel sizes. I wonder if the overall tire circumference remains the same on these different options by thinning up the sidewall? I also see plenty of " jacked" trucks and SUVs on the road. Never towing anything, though.
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Old 09-27-2014, 06:19 AM   #7
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Taller tires (on the same size rim) introduce more sidewall "squirm" it will also effect your hitch height..
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Old 09-27-2014, 06:33 AM   #8
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Quote:
Originally Posted by KiltDog View Post
Most every truck manufacturer offers multiple wheel sizes. I wonder if the overall tire circumference remains the same on these different options by thinning up the sidewall?
yes
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Old 09-27-2014, 01:50 PM   #9
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Mikebris,

Might find the "Tire Size Comparison & Speedometer Difference" calculator link in the following thread interesting.

http://www.jaycoowners.com/forums/sh...ize+calculator

Bob
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Old 09-27-2014, 09:57 PM   #10
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Tire height is very important. We had a 350 chevy and I went from 265x16 to 225x16 for summer towing. I noticed better towing performance and fewer down shifts. When camping season was over I went back to the taller tires for hunting season with it's snow and muddy ruts.
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Old 09-28-2014, 06:45 PM   #11
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If you go with a wider 275 or 285 (this is the width in mm) then you should use a lower profile tire such as 60 to keep the tire the same height i.e. 285/60/17 or 275/65/17. I didn't check for exact compatible tire sizes but you get the idea.
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Old 09-28-2014, 07:12 PM   #12
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Good explanation of what the numbers on tires mean...
http://www.goodyearautoservice.com/c...eName=TireSize
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Old 09-28-2014, 07:13 PM   #13
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Thank you
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Old 09-29-2014, 03:06 PM   #14
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Newer vehicles may have a provision to reprogram the computer for different tire sizes. This will help with things like the transmission and keeping the truck in its power band. If I were going to change the tire size on my truck, I would promptly have my computer re-flashed at the dealership to adjust to the new parameters.
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Old 10-01-2014, 10:55 PM   #15
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Oddly, sometimes "oversize" tires will cause a vehicle to wander a bit. Especially on newer vehicles, it's best to stay with what the vehicle manufacturer recommends.
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Old 10-02-2014, 06:54 AM   #16
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I upped my towing weight back in 2012 considerably. Started looking for a 3/4 ton diesel for my tow vehicle. Located a 2007 Dodge Ram 2500 with the 5.9L Cummins engine. This vehicle had already been jacked up about 4 inches and was running Moto Metal 18 inch wheels with 305 65R18 tires on it. I had to put new tires on it at the time and they ran me about $1400. I tow about 12,000 on this rig and have had no problems whatsoever for almost 3 years now. Purchased a new 5th wheeler a year ago and just this week getting a new set of tires again after three years on these. The guys at the local Dodge dealer just love this vehicle and want to buy it off me. The speedometer runs about 3 mph too low but not enough to matter as I am not a speeder, especially hauling this rig. Am I just lucky so far I have not damaged anything or will the Dodge handle this setup????

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Old 10-02-2014, 07:05 AM   #17
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This is an interesting thread. Last year I replaced my plain old standard factory delivered tires. I went up one size. Still following factory guidelines. I did switch from touring tires to All Terrains. Now when hooked to the trailer I get a bit of spin in loose gravel and grass when starting out. Not much but enough to notice. Could the size be the reason or is it the ATs vs. touring?
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