The John Deere 8R 340 is 252.8 in long, 120.1 in wide, and 137.8 in tall, with a 120.1 in wheelbase.
Length252.8 in (21 ft 0.8 in) / 6,421.1 mm
Width120.1 in (10 ft 0.1 in) / 3,050.5 mm
Height137.8 in (11 ft 5.8 in) / 3,500.1 mm
Wheelbase120.1 in (10 ft 0.1 in) / 3,050.5 mm
Ground clearance31.5 in (2 ft 7.5 in) / 800.1 mm
John Deere 8R 340 Dimensions
Overall length
252.8 in (21 ft 0.8 in) / 6,421.1 mm
Overall width
120.1 in (10 ft 0.1 in) / 3,050.5 mm
Overall height
137.8 in (11 ft 5.8 in) / 3,500.1 mm
Wheelbase
120.1 in (10 ft 0.1 in) / 3,050.5 mm
Ground clearance
31.5 in (2 ft 7.5 in) / 800.1 mm
Tractor Size Comparison Chart
Overall length comparison
This model
252.8 in
Average
125.2 in
Low
44.5 in
High
346.3 in
Overall width comparison
This model
120.1 in
Average
70 in
Low
20 in
High
176 in
Overall height comparison
This model
137.8 in
Average
79.8 in
Low
36 in
High
156 in
Wheelbase comparison
This model
120.1 in
Average
82.8 in
Low
34.8 in
High
190.5 in
Ground clearance comparison
This model
31.5 in
Average
16.3 in
Low
3.5 in
High
65.4 in
John Deere 8R 340 Extra Dimension Notes
Size class note
The John Deere 8R 340 dimension profile makes it a large farm tractor. It is a large farm tractor, so shed height, gate width, trailer space and implement room matter more than they would on a compact machine.
Storage fit note
The John Deere 8R 340 is a serious storage job. With length 252.8 in (21 ft 0.8 in) / 6,421.1 mm, width 120.1 in (10 ft 0.1 in) / 3,050.5 mm, and height 137.8 in (11 ft 5.8 in) / 3,500.1 mm, plan around large farm-shed access, not garage-style storage.
Fitment note
The John Deere 8R 340 gives length at 252.8 in (21 ft 0.8 in) / 6,421.1 mm, width at 120.1 in (10 ft 0.1 in) / 3,050.5 mm, and height at 137.8 in (11 ft 5.8 in) / 3,500.1 mm. Use those numbers for the shed, trailer and access check.
Wheelbase note
For size comparison, the John Deere 8R 340’s 120.1 in (10 ft 0.1 in) / 3,050.5 mm wheelbase is a strong reference point.
Ground clearance note
The John Deere 8R 340 has captured ground clearance of 31.5 in (2 ft 7.5 in) / 800.1 mm. More clearance helps in ruts and uneven ground; less clearance can feel more planted.
Storage Tips
Plan storage for the John Deere 8R 340 like a big field tractor, not a compact utility machine.
Use the 120.1 in wheelbase as a clue for how much approach room is needed near the shed entrance.
Overhead clearance should be measured at the lowest part of the doorway, not the tallest part of the shed.
Storage FAQ
Will it fit in a garage?
For the John Deere 8R 340, the listed storage problem is simple: 137.8 in height, 120.1 in width and 252.8 in length all have to clear. The sensible garage/shed target is 14 ft high, 14 ft wide, and 30 ft deep.
What size door should I check?
A good doorway should let the tractor enter straight without clipping mirrors, tires or door tracks. With 120.1 in width and 137.8 in height, use around 14 ft wide and 14 ft high.
Do attachments change the storage size?
Yes. For a tractor that is already 120.1 in wide and 137.8 in tall, attachments can turn a comfortable shed fit into a tight one quickly.
How much maneuvering room should I allow?
The doorway can be 14 ft wide and still be awkward if the tractor approaches at an angle. With 120.1 in width and 120.1 in wheelbase, keep posts and parked gear away from the entry path.
Official information note
Mistakes do happen. Tractor dimensions can change by year, tire setup, cab/ROPS setup, attachments and market. Please check the operator manual, build sheet and official deere.com website for official information.
