Slide rail for snowmobile rear suspension

A snowmobile rear suspension comprising:

• a left slide rail;
• a right slide rail;
• a front suspension arm assembly pivotally connected to the left slide rail and the right slide rail;
• a rear suspension arm assembly pivotally connected to the left slide rail and the right slide rail;
• and
• a shock absorber pivotally connected to one of the front and rear suspension arm assemblies and pivotally connected to the left and right slide rails,
• each of the left slide rail and the right slide rail comprising:
• an upturned front end portion;
• a middle portion rearward of the upturned front end portion, a bottom of the middle portion being flat;
• a rear end portion rearward of the middle portion, a bottom of the rear end portion being flat,
• the middle portion and the rear end portion comprising a bottom wall and a vertical wall connected to a top of the bottom wall, the bottom wall extending laterally outward from a left side of the vertical wall and laterally outward of a right side of the vertical wall to form an inverted T-shape;
• and
• a top wall connected to a top of the vertical wall, the top wall extending laterally outward from at least one of the left and right sides of the vertical wall.