I know this much: My GP 4 Seasons are sticky.
Maybe not as sticky as the Maxxis Re-fuses I had, but, very comparable to the Michelin Pro Optimums. I can tell a difference between the Pro Optimums and the GP 4 Seasons, but, it's difficult to put it to suppleness are rubber compound, etc.
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Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.