Another tire thread/question
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Joined: Sep 2011
Posts: 54
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From: Katy TX
Another tire thread/question
Sorry if its been posted but I've looked and haven't seen it. Has anyone run 345/30/19 in the rear and 315/30/18 in the front. I know both fit individually but dont know if they work together. The difference between the 2 diameters is approx .5 inch increase over stock. Not too worried about the traction control as these are for the autoX and I generally run with all nannies turned off. My main concern is with the abs. I've heard of issues others have had and the car going into "ice" mode (???) under hard braking. I really want to keep abs working correctly. Any info would be appreciated.
Tech Contributor
Joined: Jan 2015
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I honestly think ice mode is more due to non Z07 cars running brake pads that have too high friction and therefore too grippy. Z07 cars seem to have different abs tuning? Maybe I’m crazy.
I have a friend that has ran 315/30/18 and 345/35/18 on track without issue
I have a friend that has ran 315/30/18 and 345/35/18 on track without issue
Sr.Random input generator
Joined: Jan 2008
Posts: 7,804
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From: Sammamish, WA
Those sizes are one of the most common. They don't create any issues at all. So called Ice mode is also not caused by the diameter difference, but rather by locking up all tires too fast, confusing ABS to assume you're on a low traction surface. As Bruno also pointed out, high friction pads makes it easier to run into this.
Regarding tune, that's also my assumption, and I always try to buy the model with highest traction stock tires for that reason...
Regarding tune, that's also my assumption, and I always try to buy the model with highest traction stock tires for that reason...
