Tire Size to keep VDC/Speedometer happy?
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From: Washington State
Tire Size to keep VDC/Speedometer happy?
I have Yokohama AVID Envigor tires front and rear that have less then 6k miles on them, but I've grown tired of the aftermarket wheels I have and want to switch to a wider wheel with better offsets in the rear so I can remove my Ichiban wheel spacers.
I'm currently using 225/45/18 front, and 245/45/18 rear. My idea is to move the 245/45/18 Tires to the front and do a 18x9.5 Rear wheel or 19x9.5, but I can't figure out what if any tire size will not mess up the VDC/Speedometer
Below is a link to the available tire sizes for the Envigor, as I'd like to have matching front and rear sets if possible.
http://www.yokohamatire.com/tires/detail/avid_envigor
Any help is greatly appreciated, I've searched the internet quite extensively but haven't been able to find an answer to this specific question. Thanks.
I'm currently using 225/45/18 front, and 245/45/18 rear. My idea is to move the 245/45/18 Tires to the front and do a 18x9.5 Rear wheel or 19x9.5, but I can't figure out what if any tire size will not mess up the VDC/Speedometer
Below is a link to the available tire sizes for the Envigor, as I'd like to have matching front and rear sets if possible.
http://www.yokohamatire.com/tires/detail/avid_envigor
Any help is greatly appreciated, I've searched the internet quite extensively but haven't been able to find an answer to this specific question. Thanks.
All you had to do was read the new member welcome message which would have pointed you to this Top 100 Questions and this ...
https://my350z.com/forum/showthread....9&postcount=44
https://my350z.com/forum/showthread....9&postcount=44
Thread Starter
Registered User
Joined: Jun 2012
Posts: 23
Likes: 0
From: Washington State
I did read that exact page prior to posting. However it doesn't list 245/45/18 in the front, and my question is very specific as I am somewhat limited in rear tire sizing that they make for the Avid Engivor tires. Also I'd ideally like to run 19's in the rear and I'm not sure if there even is a tire size that would work with that set up.
Last edited by irishelement; Jun 14, 2012 at 04:41 PM.
Choosing the 245/45/18 for the front is gonna give you a taller tire than stock.
Besides being about 3/4" taller,IMO...gonna look bad.
To give a boxed set up,A 245/40/19 should give you the same height as the front.
Besides being about 3/4" taller,IMO...gonna look bad.
To give a boxed set up,A 245/40/19 should give you the same height as the front.
Use the tire size calculator and follow the relevant post that Dave provided.
https://my350z.com/forum/4936171-post42.html
This topic has literally been posted 1000's of times
https://my350z.com/forum/4936171-post42.html
: The "Slip" light come on randomly, especially in turns, even though my tires aren't slipping. What's up with that?
A: Both the Traction Control System (TCS) and Vehicle Dynamic Control (VDC) can cause the "slip" light to come on. There are a couple of things that can make it come on even though you don't feel/hear your tires slipping.
The most common cause for this behavior is replacement of the OEM tires with a different size. All Zs come with staggered tires, that is to say the fronts are a little shorter than the rears. This causes the tires to rotate at different rates which TCS and VDC depends on for normal operation. If you install tire combinations that don't maintain that stagger, it can cause problems for TCS/VDC resulting in the "slip" light illuminating.
The stock tire sizes and Outside Diameters are:
225/50/17 25.9"
235/50/17 26.3" (0.4" stagger)
225/45/18 25.9"
245/45/18 26.7" (0.8" stagger)
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
265/40/18 26.3"
285/35/19 26.9" (0.6" stagger)
When choosing new tires, try to find front/rear pairs that maintain the stagger of at least ½" and less than 1". You should also look for front/rear setups that maintain the same OD as that will keep your speedometer and odometer accurate.
Here are the most common "upsized" tire combinations. These are known to work and keep TCS/VDC happy.
245/40/18 25.7"
275/40/18 26.6" (0.9" stagger)
245/35/19 25.8"
275/35/19 26.6" (0.8" stagger)
255/35/19 26"
285/35/19 26.9" (0.9" stagger)
245/30/20 25.8"
275/30/20 26.5" (0.7" stagger)
Check the manufacturer's website to find the Outside Diameter of tires before you buy them, or use one of the online tire calculators:
http://www.miata.net/garage/tirecalc.html
http://www.wheelsmaster.com/rt_specs.jsp
A less common cause for the "slip" light to illuminate comes from replacing the fronts or rears only. If you replace only the fronts or rears, the stagger may not be what you think it is because the other worn pair is actually up to ½" smaller than they were when new.
New tires also come with a release agent on the surface of the rubber that must be worn off. That makes them slick and can result in your tires actually slipping, hence the "slip" light.
NOTE: The slip light does and will come on during "normal" driving that is unrelated to tire size or wear. If you apply too much throttle when launching or going around a turn, the wheels will slip and cause the light to illuminate. Also, driving on slick road surfaces (water, oil, rocks) can also cause your tires to slip.
A: Both the Traction Control System (TCS) and Vehicle Dynamic Control (VDC) can cause the "slip" light to come on. There are a couple of things that can make it come on even though you don't feel/hear your tires slipping.
The most common cause for this behavior is replacement of the OEM tires with a different size. All Zs come with staggered tires, that is to say the fronts are a little shorter than the rears. This causes the tires to rotate at different rates which TCS and VDC depends on for normal operation. If you install tire combinations that don't maintain that stagger, it can cause problems for TCS/VDC resulting in the "slip" light illuminating.
The stock tire sizes and Outside Diameters are:
225/50/17 25.9"
235/50/17 26.3" (0.4" stagger)
225/45/18 25.9"
245/45/18 26.7" (0.8" stagger)
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
265/40/18 26.3"
285/35/19 26.9" (0.6" stagger)
When choosing new tires, try to find front/rear pairs that maintain the stagger of at least ½" and less than 1". You should also look for front/rear setups that maintain the same OD as that will keep your speedometer and odometer accurate.
Here are the most common "upsized" tire combinations. These are known to work and keep TCS/VDC happy.
245/40/18 25.7"
275/40/18 26.6" (0.9" stagger)
245/35/19 25.8"
275/35/19 26.6" (0.8" stagger)
255/35/19 26"
285/35/19 26.9" (0.9" stagger)
245/30/20 25.8"
275/30/20 26.5" (0.7" stagger)
Check the manufacturer's website to find the Outside Diameter of tires before you buy them, or use one of the online tire calculators:
http://www.miata.net/garage/tirecalc.html
http://www.wheelsmaster.com/rt_specs.jsp
A less common cause for the "slip" light to illuminate comes from replacing the fronts or rears only. If you replace only the fronts or rears, the stagger may not be what you think it is because the other worn pair is actually up to ½" smaller than they were when new.
New tires also come with a release agent on the surface of the rubber that must be worn off. That makes them slick and can result in your tires actually slipping, hence the "slip" light.
NOTE: The slip light does and will come on during "normal" driving that is unrelated to tire size or wear. If you apply too much throttle when launching or going around a turn, the wheels will slip and cause the light to illuminate. Also, driving on slick road surfaces (water, oil, rocks) can also cause your tires to slip.
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