Ok, my car came stock with p195/70r15 tires, if I wanted to go back to 14 inch tires p195/75R14 what kind of difference would this make on my gas milage and my speedometer??? If it helps I have an electronic dash cluster with digital speedometer.
2006-08-30 15:39:02 · 8 answers · asked by ? 2 in Cars & Transportation ➔ Car Makes ➔ Pontiac
LARGER tires might help conserve fuel, because you're going further per wheel turn. You're effectively changing the final drive ratio. It might not help as much as you think, however...
Going further per wheel turn may actually require more power, thereby decreasing economy.
Sticking with the 15" rims, here's the deal with metric tire size: 195 = tread width, 70 is the aspect ratio (percent of sidewall height to tread width), and 15 is rim size. To go bigger, either increase the width, aspect, or both. For example, 205/70R15 tires will be a bit bigger (195*70% = 136.5, 205*70% = 143.5), as will 195/75R15 (146.25).
2006-08-31 03:10:38 · answer #1 · answered by InjunRAIV 6 · 1⤊ 0⤋
with a smaller circomfernce tire this is going to make your speedometer read like your going faster than you really are due to the fact that the car came out with larger size tires maybe by just a few miles per hour i would geuss if you insist on this size tire you will need the odometer/ speedometer recalabrated by a service technician and yes this will hurt your gas milage cause the car will run at a higher rpm range just slightlly
2006-08-30 15:47:26 · answer #2 · answered by blondie 5 · 0⤊ 1⤋
Dude they might desire to be the comparable, the "P" is the tyre utilization (e.g ideal speed, weight loading), the 1st # is the width in mm (yours are wider than those being offered and you do no longer want narrower tyres), the 2d# (70) is the peak of the tyre as a % of the width (so 70% of 225, in comparison with 70% of 185), and the final quantity is the RADIUS, the main needed one to confirm, yours are for a 15 inch rim so his 14 inch rims wont in positive condition, cheers
2016-11-06 03:00:47 · answer #3 · answered by hartzell 4 · 0⤊ 0⤋
Your speedometer will show faster than your going, it shouldn't effect millage but you will wear tires out faster because there travailing farther per revolution than 15" tires to get to the same place.
2006-08-30 15:51:36 · answer #4 · answered by unclejohn 3 · 1⤊ 0⤋
you might try the 14'' rim first the brakes might be to big for the smaller rims.if it works the computer will compensate. the speedometer work of of tire rotation.
2006-08-30 15:45:37 · answer #5 · answered by Anonymous · 1⤊ 0⤋
I suggest you give the dealer a call and ask the service department. Pretend like you want to come in and get them to put the tires on, but want to find out the ramifications of this first.
2006-08-30 15:45:10 · answer #6 · answered by The Big Shot 6 · 0⤊ 1⤋
14's are gonna be discontinued in the next few years --go to 16's or at least keep the 15's
2006-08-31 20:29:20 · answer #7 · answered by michael_stewart32 4 · 1⤊ 0⤋
1. It should make too much difference.
2. Call America's tire store by phone and ask them.
2006-08-30 15:47:18 · answer #8 · answered by p_boxter03 4 · 0⤊ 2⤋