Need Help!
05-29-2015, 02:24 PM
#1
Pro
Thread Starter
Need Help!
So my 08 Vert is lowered about 1.5 and the tires spec im running are 275/30/19 in the front and 305/25/20 in the back. I bought the car with the wheels and tires already like this. I really dont like how small and skinny the back tire is. I was thinking about going 305/30/20 on the rear and leaving the 275/30/19 in the front. My question is will i have and traction control lights or issues doing that?
Last edited by RaysLilVette; 05-29-2015 at 02:27 PM.
05-29-2015, 06:27 PM
#2
Pro
Thread Starter
No one has any information to give me?
05-29-2015, 07:12 PM
#3
Melting Slicks
With stock sizes, the larger rears rotate 0.96 of a revolution for each 1.00 rev of the fronts, and the computer reads that as normal. So, you need to make sure your tire selections stay as close to this this ratio as possible.
Use Tire Rack to find out the diameter, or more accurately the revs per mile, of your desired front and rear tires. Calculate the ratio of front/rear revs per mile, if it’s 0.96 you should have no TC issues. You may have other fitment issues that should be confirmed as well, such as are the tires suited to your wheel widths. The further you stray form the stock 0.96 ratios, the more you will have TC issues, so keep it as close as possible.
You might want to check with a trusted tire shop just to see what they recommend. One thing about tires, they always look a lot fatter standing alone on the floor of the tire shop than they do once mounted on your car, sometimes its best to copy a proven combo that you have actually seen on another base C6.
Use Tire Rack to find out the diameter, or more accurately the revs per mile, of your desired front and rear tires. Calculate the ratio of front/rear revs per mile, if it’s 0.96 you should have no TC issues. You may have other fitment issues that should be confirmed as well, such as are the tires suited to your wheel widths. The further you stray form the stock 0.96 ratios, the more you will have TC issues, so keep it as close as possible.
You might want to check with a trusted tire shop just to see what they recommend. One thing about tires, they always look a lot fatter standing alone on the floor of the tire shop than they do once mounted on your car, sometimes its best to copy a proven combo that you have actually seen on another base C6.
05-29-2015, 07:28 PM
#4
Pro
Thread Starter
With stock sizes, the larger rears rotate 0.96 of a revolution for each 1.00 rev of the fronts, and the computer reads that as normal. So, you need to make sure your tire selections stay as close to this this ratio as possible.
Use Tire Rack to find out the diameter, or more accurately the revs per mile, of your desired front and rear tires. Calculate the ratio of front/rear revs per mile, if it’s 0.96 you should have no TC issues. You may have other fitment issues that should be confirmed as well, such as are the tires suited to your wheel widths. The further you stray form the stock 0.96 ratios, the more you will have TC issues, so keep it as close as possible.
You might want to check with a trusted tire shop just to see what they recommend. One thing about tires, they always look a lot fatter standing alone on the floor of the tire shop than they do once mounted on your car, sometimes its best to copy a proven combo that you have actually seen on another base C6.
Use Tire Rack to find out the diameter, or more accurately the revs per mile, of your desired front and rear tires. Calculate the ratio of front/rear revs per mile, if it’s 0.96 you should have no TC issues. You may have other fitment issues that should be confirmed as well, such as are the tires suited to your wheel widths. The further you stray form the stock 0.96 ratios, the more you will have TC issues, so keep it as close as possible.
You might want to check with a trusted tire shop just to see what they recommend. One thing about tires, they always look a lot fatter standing alone on the floor of the tire shop than they do once mounted on your car, sometimes its best to copy a proven combo that you have actually seen on another base C6.
Thank you for your response.
The problem i think is that im running a bigger wheel 19 in the front and 20x10.5 in the back.. My back tires look super skinny when they are mounted on rear tires.. Almost like a rubberband thats why i wanted to upgrade to at least a 305/30/20
05-29-2015, 07:55 PM
#5
Le Mans Master
Thank you for your response.
The problem i think is that im running a bigger wheel 19 in the front and 20x10.5 in the back.. My back tires look super skinny when they are mounted on rear tires.. Almost like a rubberband thats why i wanted to upgrade to at least a 305/30/20
The problem i think is that im running a bigger wheel 19 in the front and 20x10.5 in the back.. My back tires look super skinny when they are mounted on rear tires.. Almost like a rubberband thats why i wanted to upgrade to at least a 305/30/20
05-29-2015, 07:58 PM
#6
Melting Slicks
I may have misunderstood as well, I thought you wanted to have a wider look. I don't know what kind of tires you have, you'd need to check for your specific tire, but looking at Michelin PSS's as an example, your ratios now would be 801/814 = 0.984
If you swapped for a 035/30/20 rear, the ratio is 764/814 = 0.939
Stock is actually 774/809 = 0.957, and since the change gets you closer to stock, then if the current sizes are no issue with TC, the change to the rears wouldn't make things any worse. But you still need to check all other aspects of fitment, the 30 series is a taller tire.
If you swapped for a 035/30/20 rear, the ratio is 764/814 = 0.939
Stock is actually 774/809 = 0.957, and since the change gets you closer to stock, then if the current sizes are no issue with TC, the change to the rears wouldn't make things any worse. But you still need to check all other aspects of fitment, the 30 series is a taller tire.
05-29-2015, 08:06 PM
#7
Burning Brakes
Thank you for your response.
The problem i think is that im running a bigger wheel 19 in the front and 20x10.5 in the back.. My back tires look super skinny when they are mounted on rear tires.. Almost like a rubberband thats why i wanted to upgrade to at least a 305/30/20
The problem i think is that im running a bigger wheel 19 in the front and 20x10.5 in the back.. My back tires look super skinny when they are mounted on rear tires.. Almost like a rubberband thats why i wanted to upgrade to at least a 305/30/20
Last edited by db2012gs; 05-29-2015 at 08:08 PM.
05-29-2015, 08:29 PM
#8
Pro
Thread Starter
So by "skinny" you mean the height from the tread to the rim? I was thinking you meant tread width ... if so, going from 305/25 to 305/30 wouldn't change anything, assuming you stayed with the same tire brand. They'd both be the same width, but 20% taller (from tread to rim edge) than what you have now. And the revs/mile would be lower on the taller tire.
05-29-2015, 08:31 PM
#9
Pro
Thread Starter
I may have misunderstood as well, I thought you wanted to have a wider look. I don't know what kind of tires you have, you'd need to check for your specific tire, but looking at Michelin PSS's as an example, your ratios now would be 801/814 = 0.984
If you swapped for a 035/30/20 rear, the ratio is 764/814 = 0.939
Stock is actually 774/809 = 0.957, and since the change gets you closer to stock, then if the current sizes are no issue with TC, the change to the rears wouldn't make things any worse. But you still need to check all other aspects of fitment, the 30 series is a taller tire.
If you swapped for a 035/30/20 rear, the ratio is 764/814 = 0.939
Stock is actually 774/809 = 0.957, and since the change gets you closer to stock, then if the current sizes are no issue with TC, the change to the rears wouldn't make things any worse. But you still need to check all other aspects of fitment, the 30 series is a taller tire.
05-29-2015, 08:51 PM
#10
Melting Slicks
Unfortunately I don't know exactly how far you can deviate from stock before you'll get TC issues, but obviously the closer you get to stock the less you'll see any issues. Plus if you go any taller on the rear you may have clearance issues. All I can suggest is go with a known, proven combo, beyond that I can't say, because I wouldn't want to steer you wrong.