| Mark my view is that a ZR rated tyre has to have a stiffer carcass than a H rated tyre and is therefore less likely to flex. Allowing the tyre to flex will help it match the surface it is trying to follow and providing you have the pressures right the generated heat along with the improved contact patch should offer more grip.
now if I wanted the ZR rated tyre to do the same I have two choices, either feed more load through it by either using a bike with more power/torque or sticking a passenger on the back.
anyone for two up racing
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