tires, speedo, etc
Thread Starter
Member
Joined: May 2004
Posts: 45
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From: st. francisville, la
tires, speedo, etc
I went to buy new tires for my 5th gen accord with stock wheels the other day. the recommended tire size for the car is 195/60/15. i was in a bit of a hurry when i was buying them, and i bought tires that were the wrong size- 195/65/15's.
here are some questions:
i know that the '195' is the width of the tire, and that the '15' is the inside wheel size, and (is this right?) that the middle number refers to the ratio of the width of the tire tothe sidewall height. so, if i have a larger middle number, or a larger ratio, that means my sidewalls should be bigger than the 60's. does that mean my tires have a larger outside circumference than the recommended ones? like, would low-pro 16's be the same rolling size as "high-profile" 15's?
if my new tires are actually larger, i should have to recalibrate my speedometer/odometer, as i would be rolling on larger wheels and the measurements won't be accurate; does anyone know how to recalibrate them? or, if not, how much it might cost at a dealer?
thanks
here are some questions:
i know that the '195' is the width of the tire, and that the '15' is the inside wheel size, and (is this right?) that the middle number refers to the ratio of the width of the tire tothe sidewall height. so, if i have a larger middle number, or a larger ratio, that means my sidewalls should be bigger than the 60's. does that mean my tires have a larger outside circumference than the recommended ones? like, would low-pro 16's be the same rolling size as "high-profile" 15's?
if my new tires are actually larger, i should have to recalibrate my speedometer/odometer, as i would be rolling on larger wheels and the measurements won't be accurate; does anyone know how to recalibrate them? or, if not, how much it might cost at a dealer?
thanks
Last edited by wil4713; Jun 23, 2004 at 06:15 PM. Reason: mistakes
Registered User
Joined: Aug 2003
Posts: 11
Likes: 0
From: Ontario
Hi
Go to this site - you can type in the new tire size and it will tell you the difference in your speedo and circumference
http://www.miata.net/garage/tirecalc.html
I checked it for you and when your speedo shows 60mph - you will actually be going 61.9mph - also your circumference is 2.4in taller
If these tires aren't installed yet, I would go buy the proper size for them - a taller sidewall means your cornering won't be as good, and depending on your shocks' quality, you could bottom out when you have lots of passengers or a full trunk
As far as I know, you won't be able to recalibrate the speedo
Take it easy
Go to this site - you can type in the new tire size and it will tell you the difference in your speedo and circumference
http://www.miata.net/garage/tirecalc.html
I checked it for you and when your speedo shows 60mph - you will actually be going 61.9mph - also your circumference is 2.4in taller
If these tires aren't installed yet, I would go buy the proper size for them - a taller sidewall means your cornering won't be as good, and depending on your shocks' quality, you could bottom out when you have lots of passengers or a full trunk
As far as I know, you won't be able to recalibrate the speedo
Take it easy
You know me...
Joined: Jun 2003
Posts: 793
Likes: 0
From: 192.168.0.100
Originally Posted by pablo13
Hi
Go to this site - you can type in the new tire size and it will tell you the difference in your speedo and circumference
http://www.miata.net/garage/tirecalc.html
I checked it for you and when your speedo shows 60mph - you will actually be going 61.9mph - also your circumference is 2.4in taller
If these tires aren't installed yet, I would go buy the proper size for them - a taller sidewall means your cornering won't be as good, and depending on your shocks' quality, you could bottom out when you have lots of passengers or a full trunk
As far as I know, you won't be able to recalibrate the speedo
Take it easy
Go to this site - you can type in the new tire size and it will tell you the difference in your speedo and circumference
http://www.miata.net/garage/tirecalc.html
I checked it for you and when your speedo shows 60mph - you will actually be going 61.9mph - also your circumference is 2.4in taller
If these tires aren't installed yet, I would go buy the proper size for them - a taller sidewall means your cornering won't be as good, and depending on your shocks' quality, you could bottom out when you have lots of passengers or a full trunk
As far as I know, you won't be able to recalibrate the speedo
Take it easy
milk-n-cookies
Joined: Feb 2004
Posts: 89
Likes: 0
From: south alabama
i take it ur still runnin stock rims...but personally i would exchange em if u could. there is a plus to having those bigger tires...ur odometer will register a mile after uve went further than a mile...this way u will be gettin more miles out of ur car without it saying so. its not really a big deal.