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

52,125

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.

52,125

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 4,994 nationwide Ram 2500 listings starting at $2,499.

ZIP:

Dodge Ram 2500 Experts

  • #1
    Dan Connell
    Reputation
    2,240
  • #2
    Ram2500Diesel
    Reputation
    650
  • #3
    tennisshoes
    Reputation
    550
View All

Related Models For Sale

Used Dodge Ram 3500
80 Great Deals out of 2,238 listings starting at $3,950
Used Ford F-250 Super Duty
361 Great Deals out of 44,819 listings starting at $1,799
Used Dodge Ram 1500
356 Great Deals out of 10,908 listings starting at $1,500
Used Ford F-150
2,317 Great Deals out of 184,577 listings starting at $699
Used Ford F-350 Super Duty
332 Great Deals out of 24,327 listings starting at $2,488
Used Chevrolet Silverado 1500
2,112 Great Deals out of 167,048 listings starting at $1,900
Used Ford F-250
468 listings starting at $6,694
Used Chevrolet Silverado 2500
6 Great Deals out of 255 listings starting at $2,900
Used GMC Sierra 1500
877 Great Deals out of 65,553 listings starting at $2,495

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
10 Great Deals out of 337 listings starting at $11,990
2009 Dodge Ram 2500 For Sale
6 Great Deals out of 277 listings starting at $8,900
2008 Dodge Ram 2500 For Sale
24 Great Deals out of 583 listings starting at $7,444
2007 Dodge Ram 2500 For Sale
29 Great Deals out of 725 listings starting at $4,995
2006 Dodge Ram 2500 For Sale
26 Great Deals out of 1,060 listings starting at $6,995

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.