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

40,195

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.

40,195

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

Add photo

Related Questions

Ram 2500

Looking for a Used Ram 2500 in your area?

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

ZIP:

Search Dodge Ram 2500 Questions

Dodge Ram 2500 Experts

#1 Dan Connell
Dan Connell
Reputation 2,110
#2 Ram2500Diesel
Ram2500Diesel
Reputation 550
#3 AJBurns
AJBurns
Reputation 470
View All

Related Models For Sale

Used Dodge Ram 3500
96 Great Deals out of 2,311 listings starting at $5,999
Used Ford F-250 Super Duty
397 Great Deals out of 45,071 listings starting at $2,000
Used Dodge Ram 1500
528 Great Deals out of 12,814 listings starting at $1,995
Used Ford F-150
2,691 Great Deals out of 211,555 listings starting at $1,000
Used Chevrolet Silverado 1500
2,283 Great Deals out of 155,210 listings starting at $1,395
Used Ford F-350 Super Duty
420 Great Deals out of 27,102 listings starting at $2,999
Used Ford F-250
512 listings starting at $3,500
Used Chevrolet Silverado 2500
10 Great Deals out of 317 listings starting at $3,995
Used GMC Sierra 1500
938 Great Deals out of 62,237 listings starting at $1,395

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
13 Great Deals out of 295 listings starting at $6,500
2009 Dodge Ram 2500 For Sale
12 Great Deals out of 309 listings starting at $8,995
2008 Dodge Ram 2500 For Sale
24 Great Deals out of 602 listings starting at $8,001
2007 Dodge Ram 2500 For Sale
20 Great Deals out of 809 listings starting at $5,999
2006 Dodge Ram 2500 For Sale
38 Great Deals out of 1,284 listings starting at $6,900