18's All Around?
Le Mans Master
Joined: Aug 2009
Posts: 5,197
Likes: 190
From: ALL governments are legalized mobsters, so doesn't matter where I live :(
Can someone clarify the TC issue for me. I just bought a set of rims 18's all the way around, and I'll be running the stock 275 40 18 out back with 245 45 18 in front. Both front and back total diameter will be EXACTLY the same (26.7")...is this going to affect my TC now???
FUUUUCCCKKKKKK!!!!
FUUUUCCCKKKKKK!!!!
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,063
Likes: 17
From: Lee's Summit MO
Race Director
Joined: Nov 2004
Posts: 11,069
Likes: 1,289
From: Central Ma
Can someone clarify the TC issue for me. I just bought a set of rims 18's all the way around, and I'll be running the stock 275 40 18 out back with 245 45 18 in front. Both front and back total diameter will be EXACTLY the same (26.7")...is this going to affect my TC now???
FUUUUCCCKKKKKK!!!!
FUUUUCCCKKKKKK!!!!
You want the rears at least 1/2" taller.
Use the chart below.
18's all around will work, but a popular set up is 265/35/18 F, and 295/35/18 R.
http://www.miata.net/garage/tirecalc.html
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
not really 1/2" taller, just a little taller.
I ran tires the same size in all four corners, and did not have a problem unless it was a high speed sweeping corner. Then all the puter did was slow me down.
CCW Big street from 5 years ago
same size tires on all four corners 18x11.5x27.5 GY G19s
I ran tires the same size in all four corners, and did not have a problem unless it was a high speed sweeping corner. Then all the puter did was slow me down.
CCW Big street from 5 years ago
same size tires on all four corners 18x11.5x27.5 GY G19s
Le Mans Master
Joined: Aug 2009
Posts: 5,197
Likes: 190
From: ALL governments are legalized mobsters, so doesn't matter where I live :(
I just put my other set up for sale locally and I'll be ordering a set of 245 40 18 sometime today. It's not half inch difference, but should be enough to make a difference.
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
You want the rears at least 1/2" taller.
Use the chart below.
18's all around will work, but a popular set up is 265/35/18 F, and 295/35/18 R.
http://www.miata.net/garage/tirecalc.html
Use the chart below.
18's all around will work, but a popular set up is 265/35/18 F, and 295/35/18 R.
http://www.miata.net/garage/tirecalc.html
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Melting Slicks
Joined: Feb 2009
Posts: 2,857
Likes: 234
From: SW Nuh Hampsha
2018 C5 of Year Finalist
Can someone clarify the TC issue for me. I just bought a set of rims 18's all the way around, and I'll be running the stock 275 40 18 out back with 245 45 18 in front. Both front and back total diameter will be EXACTLY the same (26.7")...is this going to affect my TC now???
FUUUUCCCKKKKKK!!!!
FUUUUCCCKKKKKK!!!!
Race Director
Joined: Jul 2007
Posts: 11,467
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From: 972 and 405
-Alex
Le Mans Master
Joined: Aug 2009
Posts: 5,197
Likes: 190
From: ALL governments are legalized mobsters, so doesn't matter where I live :(
I started using this site and it's great! Has a full break down and visual.
http://www.rims-n-tires.com/rt_specs.jsp?postId=906
http://www.rims-n-tires.com/rt_specs.jsp?postId=906
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Race Director
Joined: Mar 2001
Posts: 11,405
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From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
There isn't traction control issues as long you select the right size tires. I used to have 18-19 and the Ttre selection and prices are awful. If your serious about performance stay with the 18's all the way around. If you need a little bling bling go with 18/19 mucho bling and crappy performance 19/20
no issues with my setupfront tires: 275x35x18
rear tires: 295x35x18
Last edited by Ikester; Oct 24, 2009 at 07:22 PM.
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
. You need to maintain or get very close to the original factory tire circumference.It is however possible to put a larger or smaller circumference tire in the front or the rear. You just need to make sure that you increase/decrease the front and rear the same amount.
Alex has the correct size I upgraded to when I had a 18/18 setup and the circumference of the tires were the same as my factory Z06 setup and I never had issues.
I started using this site and it's great! Has a full break down and visual.
http://www.rims-n-tires.com/rt_specs.jsp?postId=906
http://www.rims-n-tires.com/rt_specs.jsp?postId=906
Its all about doing your homework BEFORE you spend the big $$... Ask for help if your not sure. Thats what this forum is great for...
Toque
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Can someone clarify the TC issue for me. I just bought a set of rims 18's all the way around, and I'll be running the stock 275 40 18 out back with 245 45 18 in front. Both front and back total diameter will be EXACTLY the same (26.7")...is this going to affect my TC now???
FUUUUCCCKKKKKK!!!!
FUUUUCCCKKKKKK!!!!
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,063
Likes: 17
From: Lee's Summit MO
Upgrading to 18/18 combo and having TC or active handling issues is NOT related to the rim size at all. Its 100% dependent on the tire size you choose. . You need to maintain or get very close to the original factory tire circumference.
It is however possible to put a larger or smaller circumference tire in the front or the rear. You just need to make sure that you increase/decrease the front and rear the same amount.
Alex has the correct size I upgraded to when I had a 18/18 setup and the circumference of the tires were the same as my factory Z06 setup and I never had issues.
This is the tire/wheel calculator I have been using and its great for looking at your options. Input your factory size tire, then start to play with the proposed tire size, and see how they compare. You will see that Alex's sizes he went to are correct (compared to stock Z06 tire circumference).
Its all about doing your homework BEFORE you spend the big $$... Ask for help if your not sure. Thats what this forum is great for...
Toque
. You need to maintain or get very close to the original factory tire circumference.It is however possible to put a larger or smaller circumference tire in the front or the rear. You just need to make sure that you increase/decrease the front and rear the same amount.
Alex has the correct size I upgraded to when I had a 18/18 setup and the circumference of the tires were the same as my factory Z06 setup and I never had issues.
This is the tire/wheel calculator I have been using and its great for looking at your options. Input your factory size tire, then start to play with the proposed tire size, and see how they compare. You will see that Alex's sizes he went to are correct (compared to stock Z06 tire circumference).
Its all about doing your homework BEFORE you spend the big $$... Ask for help if your not sure. Thats what this forum is great for...
Toque
