The John Deere X340 tractor tire size is front 15×6.5-8 and the rear is 15×6.5-8.
Front tire15×6.5-8
Rear tire15×6.5-8
Front/rear setupSame front and rear tire size
Tire pressure24 PSI, 14 PSI
Rim diameter8 in front/rear
John Deere X340 Tire Size Details
Front tire size
15×6.5-8
Rear tire size
15×6.5-8
Front/rear setup
Same front and rear tire size
Original factory tire size
Front 15×6.5-8, Rear 22×11-10
Replacement tire size
Front 15×6.5-8, Rear 22×11-10
R1 ag tire size
15×6.5-8, 22×11-10
Tire construction
Flotation/implement tire
Section width
6.5 in
Rim diameter
8 in
Approx overall diameter
about 15 in
Tire pressure
24 PSI, 14 PSI
Tire size alternatives / conversions
18×8.5-10, 20×10-10
Tire Size Comparison Chart
Front rim diameter comparison
This model
8 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 X340 Extra Tire Notes
Tire size note
The John Deere X340 uses 15×6.5-8 on both the front and rear in this data, so the same tire-size details apply to both axles: flotation/implement tire, 6.5 in section width, 8 in rim, approx 15 in overall diameter
Pressure note
For the John Deere X340 with front 15×6.5-8 and rear 15×6.5-8 tires, the pressure values captured in the answer are 24 PSI, 14 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 X340 data shows the same tire size front and rear (15×6.5-8). That usually makes the visible front/rear size relationship simpler, but approved tire and wheel combinations should still be checked before mixing brands or changing sizes
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.
