The John Deere Z997R tractor tire size is front 15×6-6 and the rear is 26×12-12.
Front tire15×6-6
Rear tire26×12-12
Front/rear setupDifferent front and rear tire sizes
Tire pressure14 PSI, 10 PSI
Rim diameter6 in front, 12 in rear
John Deere Z997R Tire Size Details
Front tire size
15×6-6
Rear tire size
26×12-12
Front/rear setup
Different front and rear tire sizes
Front tire construction
Flotation/implement tire
Rear tire construction
Flotation/implement tire
Front section width
6 in
Rear section width
12 in
Front rim diameter
6 in
Rear rim diameter
12 in
Approx front overall diameter
about 15 in
Approx rear overall diameter
about 26 in
Tire pressure
14 PSI, 10 PSI
Tire size alternatives / conversions
24×12-12, 24×10.5-12
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
12 in
Average
25.5 in
Low
0 in
High
50 in
John Deere Z997R Extra Tire Notes
Tire size note
The John Deere Z997R uses different front and rear tire sizes in this data: front 15×6-6 (6 in rim, 6 in width) and rear 26×12-12 (12 in rim, 12 in width)
Pressure note
For the John Deere Z997R with front 15×6-6 and rear 26×12-12 tires, the pressure values captured in the answer are 14 PSI, 10 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 Z997R data shows front 15×6-6 and rear 26×12-12. 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.
