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Old 05-01-2016, 04:38 PM   #81
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would you say that tire needs a camber adjustment (more or less, not sure which side was the inside)
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Old 05-01-2016, 07:49 PM   #82
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A Saturn ran those and wore to the cords in the middle, not as bad as the picture but kind of expected for a soft tire being ran for 9 hours on track.
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Old 08-06-2016, 08:06 AM   #83
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Just an update on my experience w/ the 225/45/15 v720s. They feel good on track but I dont have any back to back data where the car was setup the same or on this same size, so I can't give a direct comparison... But heres how they look after 4 events, one of which was only 3 sessions, the others being 4-6 20 min sessions. I diagonally rotated them after each event (but forgot to alternate front to back rotations), camber is -2.6f/-2.3r, ran at 25psi hot.




LR



RR



LF



RF
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Old 08-06-2016, 08:13 AM   #84
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Hard to see maybe, but the rf and lr tires are definitely doing something odd in the center rib. I started out running these at 35psi hot, but was only getting wear marks on a very small contact patch, and they felt odd under cornering like you were rolling over on them as if they had a rounded cross section in contact with the pavement... gradually aired down to 25psi and contact went all the way out to corners where you'd expect and handling felt normal.

These are 225/45 on a 15x9 wheel btw, on a 2340 lb car w/ driver, making approx 180whp.
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Old 08-29-2016, 03:10 PM   #85
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Fellow instructor at the local BMWCCA autocross was running these and they failed on him. These tires only had one track day on them and a handful of autocrosses.

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Old 09-04-2016, 12:15 PM   #86
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Update:
after another 4 session track day...
All 4 tires now showing those skits in the center rib, and 1 of them looking pretty bad.
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