speedometer, odometer issues with shorter tires?
09-10-2006, 09:08 PM
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speedometer, odometer issues with shorter tires?
So the stock 06 enthusiast REARS comes with some 245/45/18s...now, I am interested in some 17x9.5 wheels with 275/40/17...I looked it up on http://www.miata.net/garage/tirecalc.html and found out its quite a difference...about 2.3mph if I am traveling 60...
the 275/40/17 is a real short tire compared to the stock 245/45/18...my question is, will this severely effect my odometer mileage? if so, how badly do you think? i know I will gain a good deal of acceleration, since these are lightweight 17s...and the shorter tire...but is it worth a shot? let me know what ya think!
btw, they are 17x8.5 31mm 245/45/17 and 17x9.5 35mm 275/40/17...how do you think they will look on the Z?
the 275/40/17 is a real short tire compared to the stock 245/45/18...my question is, will this severely effect my odometer mileage? if so, how badly do you think? i know I will gain a good deal of acceleration, since these are lightweight 17s...and the shorter tire...but is it worth a shot? let me know what ya think!
btw, they are 17x8.5 31mm 245/45/17 and 17x9.5 35mm 275/40/17...how do you think they will look on the Z?
09-11-2006, 02:01 AM
#2
It will look kinda bad but obviously you're not doing it for looks. Go for it. Be sure to disable the traction control..... the computer might think the rears are slipping.
It will help acceleration because it gives you a more aggressive final drive gear as well as a wheel with lower rotational inertia.
I can tell you for sure my 19s even with the forged barrel made me feel pretty slow going from stock 18's.
It will help acceleration because it gives you a more aggressive final drive gear as well as a wheel with lower rotational inertia.
I can tell you for sure my 19s even with the forged barrel made me feel pretty slow going from stock 18's.
09-11-2006, 02:12 AM
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Originally Posted by Wired 24/7
It will look kinda bad but obviously you're not doing it for looks. Go for it. Be sure to disable the traction control..... the computer might think the rears are slipping.
It will help acceleration because it gives you a more aggressive final drive gear as well as a wheel with lower rotational inertia.
I can tell you for sure my 19s even with the forged barrel made me feel pretty slow going from stock 18's.
It will help acceleration because it gives you a more aggressive final drive gear as well as a wheel with lower rotational inertia.
I can tell you for sure my 19s even with the forged barrel made me feel pretty slow going from stock 18's.
09-11-2006, 02:43 AM
#4
I'm suppose it will be off by the same factor? (not sure how the ODO works)
something like
2 miles in 100,
20 miles in 1000,
200 miles in 10000,
2000 miles in 100,000
who really cares...you think you can't sell the car because it has 102,000 instead of 100,000 miles ?
something like
2 miles in 100,
20 miles in 1000,
200 miles in 10000,
2000 miles in 100,000
who really cares...you think you can't sell the car because it has 102,000 instead of 100,000 miles ?
09-11-2006, 03:13 AM
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Originally Posted by Wired 24/7
I'm suppose it will be off by the same factor? (not sure how the ODO works)
something like
2 miles in 100,
20 miles in 1000,
200 miles in 10000,
2000 miles in 100,000
who really cares...you think you can't sell the car because it has 102,000 instead of 100,000 miles ?
something like
2 miles in 100,
20 miles in 1000,
200 miles in 10000,
2000 miles in 100,000
who really cares...you think you can't sell the car because it has 102,000 instead of 100,000 miles ?
can anybody else confirm this? or any other info? mathematical formulas would be great...since i really suck at math to think of a formula
Last edited by steven88; 09-11-2006 at 03:24 AM.
09-11-2006, 01:19 PM
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actually, you know what....i sat down and quickly ran through some #s...and i believe I found out the real #s...correct me if i am wrong
if my difference is 3.8%...then I calculate whatever mileage I want to know, by 3.8%...ex...
100,000 miles on the ODO...x 3.8% = 3800 miles....
100,000 miles - 3800 miles = 96,200 miles
so when my odometer says 100,000 miles, in reality I've only traveled 96,200 miles....did I get my math right? haha
if my difference is 3.8%...then I calculate whatever mileage I want to know, by 3.8%...ex...
100,000 miles on the ODO...x 3.8% = 3800 miles....
100,000 miles - 3800 miles = 96,200 miles
so when my odometer says 100,000 miles, in reality I've only traveled 96,200 miles....did I get my math right? haha
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09-11-2006, 05:34 PM
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Originally Posted by Wired 24/7
I think the odometer works by reading the output of the transmission, so I'm thinking it might not matter at all if you change your wheel size...
I don't know. Hopefully someone else can chime in
I don't know. Hopefully someone else can chime in
09-11-2006, 09:56 PM
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btw, does anybody know the weight of a 05 track/35th or 2006 base-enthusiast rim? i believe the 05 track/35th first started to use those 5 spokes...then it carried over onto the 06 base and enthusiast...they are the same rims right?
anybody know the weight for these?
anybody know the weight for these?
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