MICHELINR PRO4 Comp Service Course. This tire targets exacting cyclists who place the emphasis on rolling efficiency. As a consequence, the new MICHELIN PRO4 COMP Service Course delivers unprecedented rolling efficiency which is an average seven percent superior to that of the MICHELIN PRO4 Service Course. This remarkable result is due to the tire's new 150TPI casing 600 threadsdm. As a consequence, the casing is 30 percent lighter, while the tire's overall weight has been reduced by 10 percent compared with that of the MICHELIN PRO3 Race. The new tire's total weight is just 180g and its rolling resistance is consequently extremely low at 3kgt. In addition to this unprecedented level of rolling efficiency, the MICHELIN PRO4 COMP Service Course delivers exceptional grip in the wet cornering speed in the wet up 16 percent, while its agility and durability are also of a very high standard for this type of tire.