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post #1 of 7 (permalink) Old 11-15-2011, 04:28 PM Thread Starter
 
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lt 285/70/17s on a 3.55

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I have went through a lot of threads. But trying to deside if I should put 285/70/17s on my 2000. Yes they will fit my SCAB 4X4 Flare, but anyone know how much of a milage killer it would be. I have 3.55s. I have 265/70/17s now.

The Ultimate Off Road vehicle is 64 Tons, Tan/Green, has a 120MM Cannon , a crew of 4 and can make popcorn.
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post #2 of 7 (permalink) Old 11-15-2011, 05:17 PM
 
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Shouldn't be too bad. You'll probably notice the difference but should get used to it. 1010tires has a cool calculator for tire size comparison. In your case, the 285's are 1.1" more in diameter and 0.8" wider. At 100 actual kph you're speedo will read 96.6 kph. Their site recommends staying within 3% of tire diameter and the 285's give you a 3.5% increase, which would be ok IMO.


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post #3 of 7 (permalink) Old 11-15-2011, 06:35 PM
 
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Originally Posted by Fordsforever6.0 View Post
Shouldn't be too bad. You'll probably notice the difference but should get used to it. 1010tires has a cool calculator for tire size comparison. In your case, the 285's are 1.1" more in diameter and 0.8" wider. At 100 actual kph you're speedo will read 96.6 kph. Their site recommends staying within 3% of tire diameter and the 285's give you a 3.5% increase, which would be ok IMO.
I think that the 3% max rule of thumb is more for passenger cars and such. Tires on trucks are often upsized big time....especially those with lift kits. More of a speedo inaccuracy....unless one re-programs it for bigger tires via dealer or a programmer/tuner.

Dave

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post #4 of 7 (permalink) Old 11-15-2011, 07:45 PM
 
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Hey Dave you won't notice that much of a difference from the stockers to the 285's, trucks aren't made for gas mileage there made to hual/tow. Just remember how far your speedo is out and drive accordingly.

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post #5 of 7 (permalink) Old 11-15-2011, 08:50 PM
 
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His question is if anyone knows how much he will loose..
There no reason no one would want to save money.

Dave.. bank on ~1mpg loss.. shouldnt be much.. slightly more weight
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post #6 of 7 (permalink) Old 11-15-2011, 09:18 PM
 
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I used to run that tire size on a 17x9" rim with the stock 3.55 gears I cant remember the milage differance exactly but it was no big deal 285's are only 1" taller than the stock 265's

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post #7 of 7 (permalink) Old 11-16-2011, 09:51 AM Thread Starter
 
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Do more Hwy than city, I know you dont own a truck to get good MPG. Just don't like to throw money away. I know towing will take a hit. If I do go that way, Ill reboot the computer. To make up for the differance.

The Ultimate Off Road vehicle is 64 Tons, Tan/Green, has a 120MM Cannon , a crew of 4 and can make popcorn.
It's a LEOPARD TANK
My new one 2003 Larit FX4, 5.4.
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