I have sold and installed hundreds of tires for motorcycles. RSV & RSTD are heavy bikes and carry heavy loads . Dunlop D404 are not the best choice for our bikes. Metzeler 880, Avon, Dunlop E3, really are the only choices we have, and they are ,all in all, fairly equal, in ride and mileage. I know some will disagree with this simply because some people like Chevy trucks better than Ford trucks. My sales and service records show that my customers who keep the correct air pressure in their tires enjoy a safe ride with great mileage, those who don't, don't. I have 5 street bikes including my baby, '05 silver RSV, they all have Metzelers . Not that I haven't tried all the brands, I have, and my customers have, and like me, they come back to the Metzelers..... winner by a nose.