Why, because they turn faster than long ones, so are much harder to catch with the towing vehicle. A long trailer on an artic is much easier to reverse than a short one (assuming there is sufficient space in the first place! ).
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly '11 MINI Countryman Cooper D All4 '90 LR 90 SW
).