I recently went thru the same thing on tires and I wanted to try the michelin commanders. I did some sizing study and this is what I am trying at this time. I purchased a commander 140/90Bx15 for the rear, and a commander MT90Bx16 for the front. The rear is very slightly narrower and the front is approx. 3/4" narrower. Some of the newer bikes are running these sizes. The ride is very good, and I am pleased with the difference at this point. Overall the bike is about 1/2" lower to the ground.I did this on a 2001 Royal Star Tour Deluxe. I am a tire and wheel man, so I didn't mind doing some experimenting. By the way, The MT90B is same as 130/90Bx16. I purchased them thru Motorcycle superstore, free shipping and no tax. Rear tire was $107.99 and front tire $87.99. Good luck on your purchase, and just wanted to give you something to think about as a possibility. I am a newbee to this site, just joined, but have been riding for many years. This is my 4th Yamaha- GREAT BIKES! Jim in Knoxville,TN.