Great steel, well formed sprockets, good looking design.
The last set of JT sprockets lasted 40,000 miles and they still had some life left in them. But I bought a JT Z3 chain which is the super bike chain and cost more money and should not be run on sprockets with this much wear on them. So, I have a match set and they will last longer that my riding days will allow. I have 62,400 miles on this street bike, so you can see the JT sprockets ran longer than the OEM sprockets which gave it up at 20,000 miles. But then maybe I am riding slower now ? Naw...