20-`18 tire change issues - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

tom692010 · 06-23-2010, 01:51 PM

I put on nitto on an 18" rim I normally run 20" for racing only. When I drive 5 miniutes thought all the gauges come on . Was I supposed to do something when I install the 18"?

ROD1 · 06-27-2010, 05:47 PM

Quote:

Originally Posted by tom692010

I put on nitto on an 18" rim I normally run 20" for racing only. When I drive 5 miniutes thought all the gauges come on . Was I supposed to do something when I install the 18"?

Same happens to me. The size difference front to back fakes the sensors into thinking that the rears are slipping. Even with trak/stabil off you get the xmas tree on the dash after awhile. Nothin you can do that I know of. Were you able to get the malfunction light off the dash some way. I found that the only way was to retune the car or put the 20s back on and drive it. I wonder if it bothers anything having the malf light on. I read somewhere on here that some guy was bracket racing and his car went nuts on his last pass and he almost lost control after making several passes with the malf light on..

2SSCAMARO · 06-27-2010, 06:40 PM

You should be able to run the 18" wheels without problems provided you use the proper tire size to equal the 28.7 inch height of the stock 20" wheels with 275-40-20 tires. See the tire and wheel combination heights in this forum.

tom692010 · 06-28-2010, 12:15 PM

Quote:

Originally Posted by ROD1

Same happens to me. The size difference front to back fakes the sensors into thinking that the rears are slipping. Even with trak/stabil off you get the xmas tree on the dash after awhile. Nothin you can do that I know of. Were you able to get the malfunction light off the dash some way. I found that the only way was to retune the car or put the 20s back on and drive it. I wonder if it bothers anything having the malf light on. I read somewhere on here that some guy was bracket racing and his car went nuts on his last pass and he almost lost control after making several passes with the malf light on..

Once I threw 20"s back on everything was normal again.

ROD1 · 06-29-2010, 08:41 AM

Quote:

Originally Posted by 2SSCAMARO

You should be able to run the 18" wheels without problems provided you use the proper tire size to equal the 28.7 inch height of the stock 20" wheels with 275-40-20 tires. See the tire and wheel combination heights in this forum.

Yupper but then ur giving back all the gear ratio you gained!

2SSCAMARO · 06-29-2010, 03:12 PM

Quote:

Originally Posted by tom692010

I put on nitto on an 18" rim I normally run 20" for racing only. When I drive 5 miniutes thought all the gauges come on . Was I supposed to do something when I install the 18"?

Did you run the same type nittos on the 20" rim also and if so how much et improvement did the 18" wheels do?

600hp-lpe · 07-01-2010, 11:29 AM

you need 18's on the front too.. if the fronts and rears are the same height there is no light issue.

The different size front / rear is raising havoc with the stabilitrac.

HJ's Garage · 07-04-2010, 05:32 PM

What type and size of 18" rim did you use? I am looking to mount a set of Nitto 305/45 drag radials on 18x10 rims of some sort. That keeps the tire diameter at 28.8" and gives it some tire wall to work with.

06-23-2010, 01:51 PM	#1
tom692010 Account Suspended Drives: 4 wheels Join Date: Mar 2009 Location: Here Posts: 1,404	20-`18 tire change issues I put on nitto on an 18" rim I normally run 20" for racing only. When I drive 5 miniutes thought all the gauges come on . Was I supposed to do something when I install the 18"?

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06-27-2010, 06:40 PM	#3
2SSCAMARO Drives: 2010 Camaro Auto Join Date: Mar 2010 Location: Fl Posts: 1,161	You should be able to run the 18" wheels without problems provided you use the proper tire size to equal the 28.7 inch height of the stock 20" wheels with 275-40-20 tires. See the tire and wheel combination heights in this forum.

07-01-2010, 11:29 AM	#7
600hp-lpe Drives: 2010 Join Date: Jul 2009 Location: NH Posts: 4,756	you need 18's on the front too.. if the fronts and rears are the same height there is no light issue. The different size front / rear is raising havoc with the stabilitrac.

07-04-2010, 05:32 PM	#8
HJ's Garage Drives: Black on Black 2SS RS A6 Join Date: Nov 2009 Location: Henderson, NV Posts: 71 View My Garage	What type and size of 18" rim did you use? I am looking to mount a set of Nitto 305/45 drag radials on 18x10 rims of some sort. That keeps the tire diameter at 28.8" and gives it some tire wall to work with.