ATV T4S Track System - Yamaha Increased steering stability and better impact absorption with two spring rates, soft for steering and stiff for impacts, Gearing matched to engine power, Front and rear factory preset spring and rubber cuts adjustment time by 50%, Stable, more precise steering for pleasant long-distance riding and long work hours, Flextrack* technology features flexible sides and a slight curve toward the inside, they provide a more comfortable ride than traditional flat tracks and reduced splatter from mud or snow