MICHELIN COMMANDER 2 130/60B-19 61H, $127.42
MICHELIN PILOT ROAD 4 GT 180/55ZR-17 73W, $190.26
(Tires purchased at American Motorcycle Tire, free shipping, no sales tax)
The Commander 2 is far superior over the stock tire. For me, the stock tire wandered on roads with mild imperfections, and required constant correction during turns. The Commander 2 is superior in both of these areas. It is rock steady on grooved and otherwise inferior road surfaces — even after trying to make it wander on sections I knew were bad. Also, tracking on turns is superb with no mid-turn correction required.
I observed no adverse bias-radial interaction.
Bottom line: These are two great tires, and combining the two is just fine.
I have the same front tire but the pilot 2 on my rear. Over 5500 miles so far and no problems and still look great. I always hated the OEM tires for how squirrely they felt on roads with lots of tar snakes. And only getting 6600 miles out of them didn't improve my opinion of them at all.