The John Deere 8630 tractor tire size is front 18.4-34 and the rear is 18.4-34.
Front tire18.4-34
Rear tire18.4-34
Front/rear setupSame front and rear tire size
Tire pressure35 PSI, 18 PSI
Rim diameter34 in front/rear
John Deere 8630 Tire Size Details
Front tire size
18.4-34
Rear tire size
18.4-34
Front/rear setup
Same front and rear tire size
Tire construction
Bias/imperial tire
Section width
18.4 in
Rim diameter
34 in
Tire pressure
35 PSI, 18 PSI
Tire size alternatives / conversions
18.4-38, 20.8-38
Tire Size Comparison Chart
Front rim diameter comparison
This model
34 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
34 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 8630 Extra Tire Notes
Tire size note
The John Deere 8630 uses 18.4-34 on both the front and rear in this data, so the same tire-size details apply to both axles: bias/imperial tire, 18.4 in section width, 34 in rim
Pressure note
For the John Deere 8630 with front 18.4-34 and rear 18.4-34 tires, the pressure values captured in the answer are 35 PSI, 18 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Official information note
Mistakes do happen. Tire sizes can change by year, axle, wheel/rim option, tyre brand, tread type and local market. Please check the tire sidewall, operator manual and official deere.com website for official information.
