Its the 4 foot model, very heavy duty weighs in at 602 pounds and all gear driven. The 1610D is a little small according to King Kutter's rep, since it is under 25HP but he said I should be ok as long as Im not taking it too deep. I have used the tiller about 15 hours or so as deep as it will go and even in hard ground it chugs right through it. I get some black smoke out the stack, but is just chews and chews and keeps going. Definitely happy with the purchase and the price too.....Tractor Supply Company on sale for $1199.99 with a full return policy. The manager told me if the tractor wont pull it, he would take it back so good deal in my opinion.
Justin