The John Deere 6600 tractor tire size is front 16.9R26 and the rear is 18.8R38.
Front tire16.9R26
Rear tire18.8R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure24 PSI, 44 PSI, 12 PSI, 14 PSI
Rim diameter26 in front, 38 in rear
John Deere 6600 Tire Size Details
Front tire size
16.9R26
Rear tire size
18.8R38
Front/rear setup
Different front and rear tire sizes
Front tire construction
Imperial radial
Rear tire construction
Imperial radial
Front section width
16.9 in
Rear section width
18.8 in
Front rim diameter
26 in
Rear rim diameter
38 in
Tire pressure
24 PSI, 44 PSI, 12 PSI, 14 PSI
Tire size alternatives / conversions
18.4-30, 12.4-24
Tire Size Comparison Chart
Front rim diameter comparison
This model
26 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
38 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 6600 Extra Tire Notes
Tire size note
The John Deere 6600 uses different front and rear tire sizes in this data: front 16.9R26 (26 in rim, 16.9 in width) and rear 18.8R38 (38 in rim, 18.8 in width)
Pressure note
For the John Deere 6600 with front 16.9R26 and rear 18.8R38 tires, the pressure values captured in the answer are 24 PSI, 44 PSI, 12 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 6600 data shows front 16.9R26 and rear 18.8R38. 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.
