Odometer & wheel size question
Thread Starter
Safety Car
Joined: Sep 2002
Posts: 4,030
Likes: 6
From: Maryland
Odometer & wheel size question
How does the C5 Odometer get its data?
I have some NittoRRRII tires from my C4, these are 275-40-17's, and I would like to mount them in the back of my C5 Z06 now, as the tires it came with are old and hard.
If I do this on the street, I would not want to add a lot of mileage to the odometer that is not real. Does the C5 get the data off the rear axle rotation and rotational, with the stock wheel diameter?
Also--anybody know if I can use C4 Sawblade rims or will only C4 5-spoke Amold rims do it? I have both but tires are now on the Sawblades.
Thanks!
I have some NittoRRRII tires from my C4, these are 275-40-17's, and I would like to mount them in the back of my C5 Z06 now, as the tires it came with are old and hard.
If I do this on the street, I would not want to add a lot of mileage to the odometer that is not real. Does the C5 get the data off the rear axle rotation and rotational, with the stock wheel diameter?
Also--anybody know if I can use C4 Sawblade rims or will only C4 5-spoke Amold rims do it? I have both but tires are now on the Sawblades.
Thanks!
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
The C5 recv. its speedometer data from a pickup mounted to the differential; gear changes to a numerically higher or lower ratio will not affect the speedometer readings, but rear tire diameter will (as it would on ANY car).
Check out this link. http://www.miata.net/garage/tirecalc.html
Your suggested combo is whithin 2% of stock, so it shouldn't present an issue speedometer-wise.
Check out this link. http://www.miata.net/garage/tirecalc.html
Your suggested combo is whithin 2% of stock, so it shouldn't present an issue speedometer-wise.
Last edited by Dan_the_C5_Man; Dec 11, 2006 at 12:37 PM.
