howdigethere

Hi,does the e-lsd/traction control/abs have any hiccups when plus sizing front and rear wheels ? assuming the front to rear is kept within the same ratio as stock- will the traction control and e-lsd work exactly the same? i would put a 355/30/19 in the rear (viber acr tire) - but its quite a bit taller than the stock cup tire.

howdigethere

anybody ?

383vett

I think the problem is that very few forum members know how the thing works with stock tires.

Track

I don’t know for sure, but I did read it cycles every 15 microseconds. I can’t imagine the wheels/tires would make a difference in operation. It is limited to 85/15% torque distribution between sides.

howdigethere

it has to make difference with how the traction control/abs/ even the e-lsd system works. changing the rolling diameter might confuse the computers.

not sure why chevy did such an odd thing by putting a 25 series tire in the back... it looks terrible, and i cant see how a 25 series runflat sidewall would perform better than a proper 355/30/19 tire (viper ACR tire).

gymdoc

I went 20/21, 295 & 355. Car has a mind of its own.. the handling has gone to ****.. I've posted multiple times here about if a recal is needed for the mag ride control or the e-lsd, and have not had a single intelligent answer.. So far I'm suspecting the Mag Ride to be the main culprit as the car tail wags really scary bad under hard throttle as if the MRC cant figure out what to do under that condition. I've been too lazy to switch back to the OEM set up to see it that resolves it, but the car had no issues prior to new tire/wheel install, and Ive also aligned it twice to rule out alignment..

On the upside, my car looks bad ***!!

Ltrain925

I run 345/30/19 which is a 27.2 diameter tire and have zero issues, on the street or the track (hpde). You should be fine with a 355

Kent1999

Keep the same ratio of front/rear overall tire overall diameter, and everything should stay happy. The car neither knows nor does it care what rim size or aspect ratio tire is mounted. All it “sees” are 4 rotational speeds as reported by the four Wheel Speed Sensors.

The car’s ABS, Active Handling look at difference in rotational speed between the 4 tires, not ground speed. The Car also knows that as designed, the rear tires are about 1” taller than the fronts, so the rears will always show that much slower rotational speed than the fronts, even on a flat dry road with no wheel slippage occurring, so it builds that difference into its calculations.

Rule of thumb here is to keep the rear tire/wheel OA diameter between 1” to 1.25” taller than the fronts. This seems to work well with near-stock sizings. More difference would be needed if you are going much taller, but I would think you’d have physical clearance issues before that.

howdigethere

355/30/19 is about 1" taller than stock 20" set up....
so if i plus size the front to make the rear exactly 1" taller than the front- all will be 100% fine ?