anyone ever heard of a rear tire that has a harder rubber compound in the center, so more miles can be ridden before buying a new one? ive been told about it, but nobody can seem to remember who makes them...or if they are more expensive.....any ideas?

 

Michelin PILOT POWER, here is a good write up about them to you can understand it.

http://www.hardracing.com/Misc/MichelinPilotPower.htm