My Stratoliner needs tires at a little less than 8,000 miles. My front is a 130/70R18 MC 63H Bridgestone G851 and the rear is a 190/60R17 MC 78H Bridgestone G Exedra. I was hoping to get Michelin Commander 2's but they don't have the rear size. Please give me your opinion on what might deliver better milage and still run good for cruising. The manual says run Bridgestone or Dunlop. Also I don't feel the need for a Radial tire. I have run Bias on all other bikes. Help please!