Street tires of different sizes - issues?
01-02-2012 | 12:11 PM
#1
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 761
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From: 2 ends of the Pacific
Street tires of different sizes - issues?
My 997.2 gt3rs will be arriving soon and I will be looking to replace the stock tires with a more usable street tire as it rains a fair bit here.
I have used Yokohama AD07 and AD08 on previous cars and love them for track and street. Superb dry traction (almost like r-compound), responsive turn-ins, predictable/progressive loss of traction, great wet performance. Unfortunately they dont come in 325/30/19.
The largest is 305/30/19 which has 1.77% smaller circumference and about 0.4 inch shorter in diameter than stock. In order to get a closer match for front tires I am thinking 235/35/19 which is 1.09% smaller in circumference and 0.3 inch shorter in diameter than stock.
I'm not too worried about lower traction thn stock as car is already far better than my last car (996.2 gt3 with suspension upgrades). I think I'll get better performance by improving driver skill for this car.
I am just wondering that with an effective relative difference of rolling circumference between front and rear tires now of 0.7% will it confuse the car's traction control or ABS? Not sure how they work and whether the traction control/ABS relies on relative difference in rotational speed between front and rear wheels to decide if any wheels are slipping (some cars do).
Any insights appreciated.
I have used Yokohama AD07 and AD08 on previous cars and love them for track and street. Superb dry traction (almost like r-compound), responsive turn-ins, predictable/progressive loss of traction, great wet performance. Unfortunately they dont come in 325/30/19.
The largest is 305/30/19 which has 1.77% smaller circumference and about 0.4 inch shorter in diameter than stock. In order to get a closer match for front tires I am thinking 235/35/19 which is 1.09% smaller in circumference and 0.3 inch shorter in diameter than stock.
I'm not too worried about lower traction thn stock as car is already far better than my last car (996.2 gt3 with suspension upgrades). I think I'll get better performance by improving driver skill for this car.
I am just wondering that with an effective relative difference of rolling circumference between front and rear tires now of 0.7% will it confuse the car's traction control or ABS? Not sure how they work and whether the traction control/ABS relies on relative difference in rotational speed between front and rear wheels to decide if any wheels are slipping (some cars do).
Any insights appreciated.
01-02-2012 | 01:17 PM
#4
Rennlist Member
Joined: Oct 2002
Posts: 25,836
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From: S.F Bay Area
