loose RPM gain MPG

Asked by Jun 30, 2016 at 05:27 PM about the 1998 Dodge Ram 2500 Laramie SLT 4WD Extended Cab SB

Question type: Car Customization

my 98 ram quadcab  runs 2200 rpm @ 62 mph by increasing tire and rim size i
hope to drop my rpm. what is the biggest road tire (circumference) that can be
possibly install on this truck

3 Answers

54,585

Put too big of tire and wheel on will actually make the fuel mileage go down. Also when changing tire sizes you have to consider odometer and speedometer error when figuring fuel mileage.

why does a bigger road tire lower my MPG. the 5.9 has enough torque at lower RPM. my thought is that instead of messing with gear ratio i can accomplish the same with larger tire circumference.. the truck has 245/75 r16 mounted now with lots of fender clearance. the speedometer difference can be remedied very easily.

54,585

Bigger tires have increased rolling resistance, they are less aerodynamic and they weigh considerably more. They will take slightly more power to get rolling and keep rolling.

Your Answer

Ram 2500

Looking for a Used Ram 2500 in your area?

CarGurus has 5,332 nationwide Ram 2500 listings starting at $2,500.

ZIP:

Dodge Ram 2500 Experts

  • #1
    Dan Connell
    Reputation
    2,270
  • #2
    Ram2500Diesel
    Reputation
    670
  • #3
    tennisshoes
    Reputation
    570
View All

Related Models For Sale

Used Dodge Ram 3500
65 Great Deals out of 2,286 listings starting at $5,999
Used Ford F-250 Super Duty
387 Great Deals out of 53,672 listings starting at $1,899
Used Dodge Ram 1500
414 Great Deals out of 11,101 listings starting at $1,499
Used Ford F-350 Super Duty
370 Great Deals out of 28,515 listings starting at $3,300
Used Ford F-150
3,211 Great Deals out of 239,209 listings starting at $1,300
Used Chevrolet Silverado 1500
2,702 Great Deals out of 196,296 listings starting at $699
Used Ford F-250
425 listings starting at $2,995
Used Chevrolet Silverado 2500
6 Great Deals out of 220 listings starting at $4,495
Used GMC Sierra 1500
1,243 Great Deals out of 71,062 listings starting at $1,750

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
12 Great Deals out of 359 listings starting at $9,955
2009 Dodge Ram 2500 For Sale
9 Great Deals out of 293 listings starting at $7,995
2008 Dodge Ram 2500 For Sale
26 Great Deals out of 643 listings starting at $8,499
2007 Dodge Ram 2500 For Sale
27 Great Deals out of 820 listings starting at $4,850
2006 Dodge Ram 2500 For Sale
25 Great Deals out of 1,137 listings starting at $4,580

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.