Any of you guys have any problems with the rear K60 getting tears or cracks? Mine has 1500 miles on it, probably 50/50 dirt/street and I have several cuts or tears running from the front of the knob to the base of the tire. I'm really surprised at this as none of my GS buds are having any problems and I thought this was supposed to be a long lasting tough tire. Plus my 990 is tons lighter than the Beemers. I've been running 30 psi off road and 38 on road with Alpina Tubless wheels. The dealer has taken pictures and set to Heidenau so I'm just waiting on if it's a flaw or normal wear. I don't feel confident enough in the tire now to take any serious rides or take the wife for a trip.