A damping control system is provided for an off-road recreational vehicles having a suspension located between a ground engaging member and a vehicle frame and including at least one adjustable shock absorber having an adjustable damping characteristic based on an input from a sensor.

A snow vehicle having a body spring subject to a load compression dictated by a control circuit. The control circuit generates a resultant load compression value by combining a pre-load compression value and a slope offset value. The pre-load compression value may be controlled by a pre-load control mechanism accessible to a user. The slope offset value may be controlled by an inertial management unit responding to data generated by a sensor array. The sensor array may comprise an accelerometer and generate 6-dimensional accelerometer data.

A slide rail for a snowmobile rear suspension has 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 from at least one of the left and right sides of the vertical wall.

A snowmobile including a right front suspension assembly and a left front suspension assembly, each of the left and right front suspension assembly including: a ski leg; an upper A-arm and a lower A-arm, the upper and lower A-arms being connected between the ski leg and the chassis; and a shock absorber connected between one of the upper and lower A-arms and the chassis; a first sensor connected between one of the upper and lower A-arms of the right front suspension assembly and the chassis to measure the angle therebetween; a second sensor connected between one of the upper and lower A-arms of the left front suspension assembly and the chassis to measure the angle therebetween; and a controller communicatively connected to the first sensor and the second sensor, the electronic signals representing angular position between the A-arms of the right and left front suspension assembly and the chassis.