Tire question!

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Mar 23, 2007
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I have 31x10.50x15's.If i go to 33x9.50's what kind of power and mileage loss will i have?Also anyone make skinny 31's?Thanks
 
you will gani milage

steep hills will suck ass
unless its a 62
 
From your screen name it sounds like you have an fj60?

You will notice a power loss. Hill starts require more clutch slipping. Long mtn passes can be tedeous. Flat highways are nicer though. And the truck looks better.

Milage...this is more a function of how you drive it. Changing the engine rpm at a fixed speed doesn't make a lot of difference in fuel economy. What will really kill your milage is that you'll now find it much more pleaseant to drive faster on the freeway. 70 is easy with 33" tires and 3.70 diffs. But driving a brick at 70 will suck fuel like you won't believe.

With 33X9.50, 3.70's, no rack I got 16mpg at 60mph and 13 at 70. Remember that your speedo will read low by ~13% with 33's. You'll also need to do the 13% adjustment for calculating milage.
 
From your screen name it sounds like you have an fj60?

You will notice a power loss. Hill starts require more clutch slipping. Long mtn passes can be tedeous. Flat highways are nicer though. And the truck looks better.

Milage...this is more a function of how you drive it. Changing the engine rpm at a fixed speed doesn't make a lot of difference in fuel economy. What will really kill your milage is that you'll now find it much more pleaseant to drive faster on the freeway. 70 is easy with 33" tires and 3.70 diffs. But driving a brick at 70 will suck fuel like you won't believe.

With 33X9.50, 3.70's, no rack I got 16mpg at 60mph and 13 at 70. Remember that your speedo will read low by ~13% with 33's. You'll also need to do the 13% adjustment for calculating milage.
so doest that mean that if my trip reads 200 miles per tank to multiply by 13 percent then add
 
so doest that mean that if my trip reads 200 miles per tank to multiply by 13 percent then add

If your trip-meter says 200 miles, then you multiply by 1.13. 200X1.13=226 actual miles.

Note that 13% is the correction on my 60, with my "33" inch tires. I've checked it with GPS. Can also check by comparing known milage to tripmeter reading.

For example, if point A to point B is 185 miles, and your odometer shows 164, then you have a correction factor of 185/164 = 1.13
 
If your trip-meter says 200 miles, then you multiply by 1.13. 200X1.13=226 actual miles.

Note that 13% is the correction on my 60, with my "33" inch tires. I've checked it with GPS. Can also check by comparing known milage to tripmeter reading.

For example, if point A to point B is 185 miles, and your odometer shows 164, then you have a correction factor of 185/164 = 1.13
sweet
thanks
shtty that means im only gettng about ten miles a gallon:doh:
 
I have not driven a small tire cruiser but mine has the 33 x 9.5 on them and i get 16.9 MPG at 2300(unadjusted) RPMs which is running really close to sixty.

In town it sucks though because there is a lot of starting and stopping involved and with the 3.70s and tall tires it takes more power to get it rollin I don' thave any huge hill climbs but mine does pretty good on the ones i have.

lunyou
 

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