They are on 120" spacings, we only lose traction in low spots!, Its unbelievable how well it pulls hills, we had a 9620R with triple 520's and it would spin out pulling that seeder on the slightest hill!
For us it hills, having the seed cart in between puts weight on the rear of the tractor giving us better traction, you’ll see a lot of big tow behind cart in the flat land where they need capacity and towing a dead weight behind the dill isn’t a problem
