As far as tracks go on grain carts, I know everyone loves them.... but, We ran into late corn and flowers one year in the snow and ice, had a 1200 bushel with tracks and a 1200 bushel with big duals, the track cart, one we couldn't pull it in the hills, takes so much power and momentum to keep that cart moving that you'd get half way up, start sliding backwards, power hop, then you were done. That and we ruined the undercarriage by letting it fill up with mud and ice during the day, then tried moving in the morning, thats all she wrote. During a "normal" year, we loved the track cart. If you get a dualed cart, don't buy one that has walking tandems.... You will tip those p.o.ses over. We had a Parker and now a Demco. Both have/had 710R38s hub style like a 4wd is set up.