I have a Metzeler Z-4(170/60-17) on the back of my '94 GTS with about 7k on it and it is holding up fine . Seems to wear well and hasn't skidded on me (I don't ride that hard). When it comes time to replace the set next winter I think, I will replace the front (Metzeler Z-1 130/60-17) with the Metzeler z-4 120/70-17 and another z-4 on the rear. Mark Evitts
