I've got those Continental Speed Ride tires and have completed 2 rides for 20 miles total. My last ride (not counted in those two for 20 miles) I only made it a little less than 4 miles before I wiped out. I took a right turn too fast , hit some soil/debris on the entrance to a parking lot and down I went. I'm not going to say I think the tire was at fault but I don't know if it helped. I haven't decided if I'll switch back to my stock Bontrager H5 tires or not. Maybe just for peace of mind. Those Speed Ride tires have some funky looking tread on them. I also didn't notice a performance improvement when I switched to the Speed Rides, but I had only been on 4 rides for 60 miles with the H5's.