Out yesterday on my RT, having ditched its original 21's for the above (Despite the fact bike has only done 2500 miles) the grip, turn in, handling and comfort of these tyres are exceptional. By the way the bike is as well. OK it lacks the raw power of the K's but makes up for it in far more refined suspension, a far more lithe and better handling bike all round. I know you K boys love the big K fours and long may it continue, but when the time comes for you to move on for me for the money there are better 4's out there, including both the Versys 1000 and the newer SX and if you feel a bit more radical go for a Boxer !