Michelin Pilot Road 4 Tires Review http://www.revzilla.com/motorcycle/michelin-pilot-road-4-tires?utm_source=youtube.com&utm_medium=description&utm_campaign=Michelin_Pilot_Road_4_Tires This first look compares the popular MIchelin Pilot Road 3 tires to the new Pilot Road 4 tires with a brief overview of the improvements found on the latest generation. The Michelin PR3’s have been a perennial favorite from Sport, Sport Touring and even ADV bikes for the last 2 years, and the new version boasts more longevity and even better wet grip handling. Some of the most notable changes include a decrease in the siping on the front tire, and a lower groove ration at the edge of the tire for improved grip, especially at extreme lean angles. The new PR4 rear tire also features the updated XST+ Siping Technology and a lower groove ratio at the edges of the tires, but now has a new compound distribution in the dual compound layout. The PR4 now features a harder durometer rubber down the center of the rear tire, covering about 20% of the tire surface as compared to a medium compound found in the PR3 that covered about 80% of the tire surface. The sidewalls now use a medium compound at each 40% of the sidewall for great grip without the sacrifice of wear. The new Michelin PR4 will be available in 3 versions, a PR4 version for most street bikes, a PR4 GT for larger touring bikes and 2-up riding and a PR4 Trail version for ADV bikes that never leave the pavement. Stay tuned for our long-term review, where we put the new Michelin PR4 through its paces.