Think he may be basing it on the brochure specs..... where JCB quote 9.8m and Fendt quote 5.5m.
Difference is the JCB is the external and the Fendt is the internal unless it can turn in it’s own length?
The Fendt is also on tow crops to achieve that, the JCB is on its normal tyres.
Not correct a JCB 4220 has a turning circle of 9.8m on 540 R30's, Fendt 724 on its standard tyres of 540/65 R30 and 650/65 R42 has inner turning circle of 5.5m, as its 2.55m wide the rest can be worked out...... In fact a 828 is 5.4m. I am not sure there are many people who would choose to pull a sprayer of the size and weight of a Horsch 6-8 GS with 540 R30's during the winter months?