9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
6.5
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
SPROCKET
LOWER
SPROCKET
CHAIN
LENGTH
RATIO
THEORETICAL VEHICLE SPEED (MPH) AT 1:1 SHIFT RATIO @ RPM
8050
8250
8450
7T / 2.86P
7T / 3.00P
7T / 2.86P
7T / 3.00P
7T / 2.86P
7T / 3.00P
21
42
74
2.00
76
80
79
82
80
84
21
43
74
2.05
75
78
77
80
78
82
22
45
76
2.05
75
78
77
80
79
82
19
40
72
2.11
73
76
74
78
76
80
21
45
76
2.14
71
75
73
77
75
79
20
43
74
2.15
71
75
73
76
75
78
19
41
72
2.16
71
74
73
76
74
78
19
43
74
2.26
68
71
69
73
71
74
19
44
74
2.32
66
69
68
71
67
73
* 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
YEAR
MODEL
TRACK
TOP GEAR
BOTTOM
GEAR
PITCH
2020
850 PRO-RMK 155
< 3.0
22
43
69
850 RMK Khaos 155
< 3.0
22
43
69
850 PRO-RMK 163
< 3.0
22
43
69
850 PRO-RMK 155 3.0 Track
3.0
19
44
74
850 RMK Khaos 155
3.0
19
44
74
850 PRO-RMK 163 3.0 Track
3.0
19
44
74
850 PRO-RMK 174 3.0 Track
3.0
19
44
74
850 SKS 155
< 3.0
20
40
72
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
speedometer offset.
Summary of Contents for 850 PRO-RMK 155 2.6" QD 2021
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