Ok I have a few questions about Dunlop Slicks, I have a set of Dunlop KR106 and Dunlop KR108. 1.) How can I find out what compounds they are (ex. Soft, Medium, Hard)? 2.) And is it ok to use a Dunlop KR106 FRONT and a KR108 REAR? At the same time? 3.) Finally, What tire pressures should I be using for the KR108, because it is a NTEC tire which is a harder carcass. I know the school runs 29FR 31 RR.