tire size
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tire size
Hi i am wondering what tires will get the best gas milage. I currently have 265/75/16 and would a 285or295/75/16 be better A larger tire less rpm at highway speed but mure throttle needed to get to speed. Would a 234or245/75/16 be better less throttle needed but more rpm on the highway. Thank you for the help
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From: MICHIGAN
Larger diameter tires may give you better milage but it depends on your gear ratios and if you tow heavy loads or not. If you have 4:10 gears bigger tires will get better milage but towing will suffer a bit. Knowing your rear gear ratio will help.
Wider tires even if they are larger in diameter will reduce your milage. IMHO
Wider tires even if they are larger in diameter will reduce your milage. IMHO
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From: In the Georgia Pines
i have a set of 285/75's and they fill out the wheel well nice. i've heard that some 295's may rub on the front. 265's is a great balance of fuel economy (less tire on the pavement) and looks.
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From: 21791
For best mileage, you want a narrow tire (the first number, 235, 265 etc) to be lower, and the aspect ratio (the second number, between 65 and 90 usually) to be higher. A narrow tire with a high aspect ratio is usually a tall but narrow tire, better in snow too.
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Originally Posted by mjlewis
i have a set of 285/75's and they fill out the wheel well nice. i've heard that some 295's may rub on the front. 265's is a great balance of fuel economy (less tire on the pavement) and looks.
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Originally Posted by scottty
Wow thank you. so what you are saying is the narrower the tire IE the smaller the tire the better the milage.
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Post Fiend
Joined: Oct 2003
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From: MICHIGAN
Narrower tires will give better milage vs wider tires.
The diameter of the tire effectively increases/decreases your overall gear ratio. The overall gear ratio will effect engine speed (RPM) at a given speed over the road. Keep in mind that your speedometer and odometer becomes less accurate as the tire size deviates from the OEM tire size.
The 'sweet spot' for most of these diesels are 2000 rpm +/- a cople hundred RPM. Each one is a little different. You can figure your 'sweet spot' by keeping a log of your gallons of fuel and miles driven over a period of time with notes about load and speeds during the fuel usuage. That seems like a lot of work but over time it gets easier and more acurate.
I personally watch my boost gage. The higher it goes the more the milage goes down.
The diameter of the tire effectively increases/decreases your overall gear ratio. The overall gear ratio will effect engine speed (RPM) at a given speed over the road. Keep in mind that your speedometer and odometer becomes less accurate as the tire size deviates from the OEM tire size.
The 'sweet spot' for most of these diesels are 2000 rpm +/- a cople hundred RPM. Each one is a little different. You can figure your 'sweet spot' by keeping a log of your gallons of fuel and miles driven over a period of time with notes about load and speeds during the fuel usuage. That seems like a lot of work but over time it gets easier and more acurate.
I personally watch my boost gage. The higher it goes the more the milage goes down.
Last edited by Cuda_jim; Mar 12, 2007 at 10:10 AM.
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From: ABQ, NM
With 3.73's, I went from 265\75's steel tex to 315\75 BFG MT's. My hiway mileage went from 21 to 19mpg. I think a combo of diameter,knobby tread and as mentioned before, width. Then I put 4.10's and 4'' exhaust and mpg dropped to 14 hiway. Depending on your computer will also affect how your truck handle the taller tires. ie.. If it dumps more fule even though RPM's are lower.
If you go 10% bigger on tires, then I would think it would add 10% more load on motor. So, a 10K# pound trailer would feel 1K# heavier than before. (I think)
If you go 10% bigger on tires, then I would think it would add 10% more load on motor. So, a 10K# pound trailer would feel 1K# heavier than before. (I think)
Last edited by tumbleweed2; Mar 12, 2007 at 10:15 AM.
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Originally Posted by scottty
Thank you so much so narrower and smaller will be the best milage?