Gearing Stock Settings - 2020 - Polaris 850 PRO-RMK 155 2020 Manual

CHAINCASE SPROCKET RATIO SPEED CHART – AXYS RMK
7.764" (197.2 MM) CHAINCASE
NOTE: SHADED COLUMNS = 7 TOOTH DRIVER WITH 3 IN. / 3 PITCH TRACK.
UPPER LOWER
SPROCKET SPROCKET
21 42
21 43
22 45
19 40
21 45
20 43
19 41
19 43
19 44
* NOTE: To calculate the ratio equivalent to an 8T / 2.86P driveshaft, multiply the ratio shown in this chart by 1.143 for 7T / 2.86P
driveshafts or 1.09 for 7T / 3.00P driveshafts.

GEARING STOCK SETTINGS - 2020

GEARING STOCK SETTINGS
MODEL
MODEL
YEAR
850 PRO-RMK 155
850 RMK Khaos 155
850 PRO-RMK 163
850 PRO-RMK 155 3.0 Track
2020
850 RMK Khaos 155
850 PRO-RMK 163 3.0 Track
850 PRO-RMK 174 3.0 Track
850 SKS 155
Use the Gearing Stock Settings when making gearing changes with Digital Wrench. If the upper and lower sprockets
on the snowmobile do not match the model specifications in the table, Digital Wrench must be used to re-calibrate the
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
THEORETICAL VEHICLE SPEED (MPH) AT 1:1 SHIFT RATIO @ RPM
CHAIN
RATIO
LENGTH
7T / 2.86P
74 2.00 76
74 2.05 75
76 2.05 75
72 2.11 73
76 2.14 71
74 2.15 71
72 2.16 71
74 2.26 68
74 2.32 66
TRACK
< 3.0
< 3.0
< 3.0
3.0
3.0
3.0
3.0
< 3.0
speedometer offset.
FINAL DRIVE / BRAKE SYSTEMS
8050 8250
7T / 3.00P 7T / 2.86P 7T / 3.00P
80 79 82
78 77 80
78 77 80
76 74 78
75 73 77
75 73 76
74 73 76
71 69 73
69 68 71
BOTTOM
TOP GEAR
GEAR
43
22
22 43
22 43
19 44
19 44
19 44
19 44
20 40
8450
7T / 2.86P 7T / 3.00P
80 84
78 82
79 82
76 80
75 79
75 78
74 78
71 74
67 73
PITCH
6
69
69
69
74
74
74
74
72
6.5