Honda FourTrax Rancher TRX420TM1 2020 Owner's Manual page 240

Specifications
Power Transmission
primary reduction
secondary reduction
final reduction
transmission ratio
final drive
Chassis & Suspension
caster
trail
tire size, front
tire size, rear
tire pressure,
front & rear (cold)
230 Technical Information
front (Except
TRX420TM1)
rear
1st
2nd
3rd
4th
5th
reverse
2°
0.2 in (4 mm)
AT24 × 8-1211
AT24 × 10-1111
front:
4.4 psi (30 kPa)
rear:
4.4 psi (30 kPa)
2.103
1.818
3.231
3.154
3.857
2.235
1.571
1.178
0.848
4.832
shaft
MAXXIS M977
MAXXIS M978