A snowmobile comprises a chassis with a front portion and a tunnel, and a power train unit supported by the chassis. The snowmobile further includes a plurality of ground-engaging members cooperating with the power train unit to operate the snowmobile. The plurality of ground-engaging members includes a pair of front skis and an endless track assembly. The track includes a wide track belt and the snowmobile body portions and chassis are adapted to fit the wide track belt. A rear rack assembly is positioned on a rear of the snowmobile frame and can support a passenger seat.