2020 POLARIS 850 PRO-RMK 163 (3-Inch), 2020 POLARIS 850 PRO-RMK 163 (3-Inch)The Polaris PRO-RMK 850 163 (3-Inch) is a mountain style snowmobile with an MSRP of $14,599 and is new for 2020. Power is provided by a 2-Stroke, 840cc, Liquid cooled, Reed Valve, Horizontal In-line engine with Pull starter. The engine is paired with transmission and total fuel capacity is 11.5 gallons. The PRO-RMK 850 163 (3-Inch) has front tires and a rear tires. The front suspension is an Independent A-Arm while the rear suspension is an . Front brakes and rear Hydraulic Disc brakes provide stopping power. The PRO-RMK 850 163 (3-Inch) comes standard with an One-Piece, 1-passenger seat.