dflw_99

i recently put some aftermarket tires 31X10.50R15 on my 2000 frontier xe auto, the thing is that i have lost a lot of my top end exsepically in top gear between 1500 and 2000 once it goes past this it does better but not much. Just wondering what i could do for more pormance in top gear,

can someone tell me a cheap and/or the better and more expensive and what you would recommend

besides telling me to buy a new one

thx

jerryp58

What size tire did you have before?
Don't forget, if they were smaller, your speedo is reading low.

But, it's a common complaint when people go to larger tires.
A lot of people change to a lower gear ratio (higher number).
Do you have 4wd? If so, you've got to change gears in both diffs.

__________________

Jerry
2004 Frontier, King Cab, XE, 4x1, 4-cyl, 5-spd
My Frontier Page

dflw_99

i have 215X65R15 on it stock now i have 31X10.50R15's on it know, how will that effect my speed on my speedo. someone gave me a link to a tire chart but my comp would not pull it up


thx

jerryp58

Well, you jumped up 5" in overall diameter

I'll try to paste in the specs...

Section Width: 8.46 in 215 mm
Section Width: 10.51 in 267 mm

Rim Diameter: 15 in 381 mm
RimDiameter: 15 in 381 mm

Rim Width Range: 6 - 7.5 in
Rim Width Range: 7 - 9 in

Overall Diameter: 26.00 in 660.4 mm
Overall Diameter: 30.97 in 786.63 mm

Sidewall Height: 5.50 in 139.7 mm
Sidewall Height: 7.98 in 202.69 mm

Radius: 13.00 in 330.2 mm
Radius: 15.48 in 393.19 mm

Circumference: 81.68 in 2074.6 mm
Circumference: 97.29 in 2471.1 mm

Revs per Mile: 800
Revs per Mile: 671.6

Speedometer1: 60 mph 100 km/h
Speedometer2: 50.3 mph 83.9 km/h

Speedometer Difference: 19.11% too slow Diameter Difference: 16.05%

OK, the table came in as "top number" = original size, "bottom number" = new size. So now, when your speedo is reading 70 MPH, you're actually doing 83 MPH. Your top end just got a little farther away according to your speedo.

__________________

Jerry
2004 Frontier, King Cab, XE, 4x1, 4-cyl, 5-spd
My Frontier Page