Yesterday I went to the track and started with 28psi cold on MPS4S 305/30/19. After a session they were 32psi. Next session 32psi as well. Grip felt great.
On the way home at 65 mph I suddenly feel the car pulling left, then start to hop and I quickly stop on the shoulder. See photos of the tire.
I don't understand what happened. It is like the sidewalls were wearing from inside the tire until they were super thin and then completely ripped apart. Two part question:
1-What do you reckon likely caused that?
2-The remaining 3 tires have about 30% track life left. Would you replace just one, a pair, or all 4? I rotate after each track day but I reckon if I buy just one I could leave it on the front right corner (fastest wearing at my track) for the remainder of the set's life (about 4 days) and then replace all 4. WWYD?
Thanks!
*the last picture is one of the other 3 tires to give an idea of sidewall/tread outside wear. The inside sidewall/tread edge is better at 5/32nd.
![20220615_133111.jpg 20220615_133111.jpg](https://trackmustangsonline.com/data/attachments/76/76525-6234776467a2f8a3e5bb611c96af4037.jpg)
On the way home at 65 mph I suddenly feel the car pulling left, then start to hop and I quickly stop on the shoulder. See photos of the tire.
I don't understand what happened. It is like the sidewalls were wearing from inside the tire until they were super thin and then completely ripped apart. Two part question:
1-What do you reckon likely caused that?
2-The remaining 3 tires have about 30% track life left. Would you replace just one, a pair, or all 4? I rotate after each track day but I reckon if I buy just one I could leave it on the front right corner (fastest wearing at my track) for the remainder of the set's life (about 4 days) and then replace all 4. WWYD?
Thanks!
*the last picture is one of the other 3 tires to give an idea of sidewall/tread outside wear. The inside sidewall/tread edge is better at 5/32nd.
![20220615_133404.jpg 20220615_133404.jpg](https://trackmustangsonline.com/data/attachments/76/76520-fababb132abc179063154610494626b4.jpg)
![20220615_134809.jpg 20220615_134809.jpg](https://trackmustangsonline.com/data/attachments/76/76522-6ddbf860f19465ed07f0fd38c30431d1.jpg)
![20220615_133327.jpg 20220615_133327.jpg](https://trackmustangsonline.com/data/attachments/76/76523-a1e745a0f9d1c55adee4410768563051.jpg)
![20220615_134856.jpg 20220615_134856.jpg](https://trackmustangsonline.com/data/attachments/76/76524-13b745ecbf2f5028f66294f0a872658d.jpg)
![20220615_133111.jpg 20220615_133111.jpg](https://trackmustangsonline.com/data/attachments/76/76525-6234776467a2f8a3e5bb611c96af4037.jpg)