The John Deere STX30 tractor tire size is front 13×5-6 and the rear is 18×6.5-8.
Front tire13×5-6
Rear tire18×6.5-8
Front/rear setupDifferent front and rear tire sizes
Tire pressure14 PSI, 22 PSI
Rim diameter6 in front, 8 in rear
John Deere STX30 Tire Size Details
Front tire size
13×5-6
Rear tire size
18×6.5-8
Front/rear setup
Different front and rear tire sizes
Original factory tire size
Front 13×6.5-6, Rear 18×8.5-8
Front tire construction
Flotation/implement tire
Rear tire construction
Flotation/implement tire
Front section width
5 in
Rear section width
6.5 in
Front rim diameter
6 in
Rear rim diameter
8 in
Approx front overall diameter
about 13 in
Approx rear overall diameter
about 18 in
Tire pressure
14 PSI, 22 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
6 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
8 in
Average
25.5 in
Low
0 in
High
50 in
John Deere STX30 Extra Tire Notes
Tire size note
The John Deere STX30 uses different front and rear tire sizes in this data: front 13×5-6 (6 in rim, 5 in width) and rear 18×6.5-8 (8 in rim, 6.5 in width)
Pressure note
For the John Deere STX30 with front 13×5-6 and rear 18×6.5-8 tires, the pressure values captured in the answer are 14 PSI, 22 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Front/rear matching note
The John Deere STX30 data shows front 13×5-6 and rear 18×6.5-8. When changing either size, front/rear rolling circumference and lead/lag need to stay within the correct range
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.
