John Deere 160 (1988), Arctic Cat 400 ATV (2006), Kubota BX23S (2018), Jacobsen Super Chief 1450 (1969), Cub Cadet RZT S50 zero turn mower (2012)
cool photo - looks like a customized / modified, very early version of a soap box derby car.
not sure that I would call it a tractor, not sure what that front hitch / bumper contraption is or does
love the front wheels