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15-10-2008, 02:35pm
5,500km
Starting to see wear now. Like Bruce mentioned above, they seem to deteriorate more when they get heat into them.
Front : Has started feathering and steering isn't as precise. No balling up, but I'm not a speedster. Tread depth on sides about 60% of tread depth in centre. Even with attention to pressures, there's more frequent squirming and chirping associated with road surface irregularities and debris - not to mention mid-corner 'pushing' effects from the rear (more on this later). I've entered that 'phase' where I'm now more conscious of the stresses I exert on the front tyre and am acutely aware of feedback - especially on corner exits. I had expected I'd get another 2,000km out of them before that happened, but still, I can't complain - and I'm not.
Rear : Barely any feathering - but remember that the profile of these tyres is quite shallow and cornering stresses seem to be shared across a broader transition patch - off the centre and onto a shallow shoulder. Tread depth seems virtually unchanged - all over - although grip seems to be coming off slightly with more chirping and a couple of small side-steps lately. All very controllable and predictable. Rear is wearing better than the front.
I suspect that the deterioration in the front is partially being caused by the grip characteristics of the rear - as in - as I gas up on apex, you can feel that the rear is 'pushing' the front and I am starting to detect a lineal squirm in the front when this happens (English version - the power creates a minor 'under-steer' condition as the front is pushed forward, slightly extending the cornering arc).
I think there's another 2,000km left in the front and around 3,500km in the rear. Nothing to complain about.
Starting to see wear now. Like Bruce mentioned above, they seem to deteriorate more when they get heat into them.
Front : Has started feathering and steering isn't as precise. No balling up, but I'm not a speedster. Tread depth on sides about 60% of tread depth in centre. Even with attention to pressures, there's more frequent squirming and chirping associated with road surface irregularities and debris - not to mention mid-corner 'pushing' effects from the rear (more on this later). I've entered that 'phase' where I'm now more conscious of the stresses I exert on the front tyre and am acutely aware of feedback - especially on corner exits. I had expected I'd get another 2,000km out of them before that happened, but still, I can't complain - and I'm not.
Rear : Barely any feathering - but remember that the profile of these tyres is quite shallow and cornering stresses seem to be shared across a broader transition patch - off the centre and onto a shallow shoulder. Tread depth seems virtually unchanged - all over - although grip seems to be coming off slightly with more chirping and a couple of small side-steps lately. All very controllable and predictable. Rear is wearing better than the front.
I suspect that the deterioration in the front is partially being caused by the grip characteristics of the rear - as in - as I gas up on apex, you can feel that the rear is 'pushing' the front and I am starting to detect a lineal squirm in the front when this happens (English version - the power creates a minor 'under-steer' condition as the front is pushed forward, slightly extending the cornering arc).
I think there's another 2,000km left in the front and around 3,500km in the rear. Nothing to complain about.