Vehicle with sliding door

A vehicle having a vertical plane that bisects the vehicle into a driver's side and an opposed side, the vehicle comprising:

• a chassis;
• a body supported by the chassis, wherein the body defines a cab, wherein the cab defines an opening configured to provide operator access to the cab;
• at least one track;
• a cab door that is configured to travel along the at least one track about and between an open position and a closed position along a linear axis, wherein the cab door is configured to move parallel to the linear axis from the open position to the closed position, wherein, in the closed position, the cab door at least partially covers the opening of the cab, wherein the linear axis forms an acute angle with the vertical plane that bisects the vehicle,
• wherein the at least one track comprises an upper track and a lower track,
• wherein the vehicle further comprises a plurality of upper support brackets that couple the cab door to the upper track, wherein the plurality of upper support brackets comprise at least:
• a first upper support bracket that is configured to maintain a first spacing between the cab door and the upper track along a transverse axis that is perpendicular to the vertical plane;
• and
• a second upper support bracket that is configured to maintain a second spacing between the cab door and the upper track along the transverse axis, wherein the second spacing is less than the first spacing.