I know I brought this question up some time ago on a different post but will ask it in a different way. I am a lay-man so..... I still have this thing in my head about the type of rubber tire's come with. Ok, year's ago I purchase winter tread's for an auto and in the cold winter they were as hard as rock. I didn't know the difference but I know they were not that good with traction even though they had deep tread's. This is how I heard this, a person asked about my tire's and I told him mine seemed like rock's! He asked me what rating are they (rubber soft or hard) listed something like A to or D rubber, D being the hard rubber with longer wear and the worst traction. Hmmm, I knew nothing about this but was told at that time that there were tire's that were A rated or B rated that are softer rubber, better traction but not wearing. Is there someone on this forum that ever heard this or know's about this and could it relate to Scooter Tire's? Duh me so thank's...