Front drive geometry for an all-terrain vehicle

An all-terrain vehicle comprising:

• a frame defining a central longitudinal axis coincident with a travel direction of the vehicle;
• a straddle seat mounted on the frame for supporting a driver;
• front and rear wheels suspended from the frame, each wheel being disposed with a low-pressure balloon tire, the front wheels having a diameter less than 11inches;
• a handlebar disposed on the frame, the handlebar being operatively connected to at least one of the wheels for steering the vehicle;
• an engine mounted on the frame, the engine being operatively connected to at least one of the rear wheels to propel the vehicle over the ground;
• each front wheel defining a wheel center line and being supported by an upper pivotal joint and a lower pivotal joint, the upper and lower pivotal joints defining a king pin axis, about which the front wheel can be rotated for steering the vehicle;
• and
• a disk brake including a disk having an aperture into which the lower pivotal joint protrudes whereby the lower pivotal joint intersects a plane of the disk brake;
• wherein
• (1) a downward projection of the wheel center line intersects the ground at a first distance Dl from the central longitudinal axis of the vehicle;
• (2) a downward projection of the king pin axis intersects the ground at a second distance D2 from the central longitudinal axis;
• (3) a scrub radius (SR) is defined as SR=Dl-D2;
• and
• (4) SR≦0.