I get mine off a superstock rider too, he does one session then bins them!
I wouldn't use them if road riding was high on my agenda cos I think they'll just flatten way too quick. Even with my slow road manner I get loads of 'ruffling up' about half across the tyre. Road miles built up very quickly too, so they're not going to last very long.
Never had a problem with them when cold, although most others have.
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