A Z rated at racing speed on a track with a lighter bike will get more heat into it than the same Z rated on a road bike on the road. So why not make them available, as there are plenty of outlets to choose from at competitive prices.
Given this option I would bet money that very few people would elect to stay with the Hr and opt for the Zr, I certainly would use the Zr.
If you always do what you always did you will always get what you always got. So lets move on, as this tyre won't be around after this season if it makes the season duration.
Also as we
HAVE to use it I think a monopoly on price is occuring, not to our advantage either.
