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This 'Cupping' is common with all the 'block cut' tyres. I had it happen an all my sets of Tourances, and with the Michelin T66 's and no doubt it is the same on the Annakees.
It is caused by the weight transfer when you apply the front brake. Don't forget that the Tiger fuelled up and with a rider on board is pretty darned heavy and all that forward momentum puts enormous pressure on those blocks. But if you look at the wear it seems the opposite of 'drive wear' and is a puzzle at first.
Interesting to note is that since fitting the Bridgestone Battle Wings, because they are not so much block cut, i cannot see any any signs of cupping anywhere yet.
I used to end up with almost a rumble from the tyres and you could hear the road noise from the tyres in the end. a bit off putting at first, but as i said, it is always going to be an issue with this kind of tyre.
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Big Stripey
I am but mad north-north-west: when the wind is southerly I know a hawk from a handsaw
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