Glenn,The front tires are Goodyear Soft Tracs,29x12.50-15 The rear tires are Firestone R-3,Field/Turf,21.5L-16.1. These tires are mounted on Kubota rims and offered as an option.I can't tell you for sure of the cost,I think around 200.-400. Our tractor was priced as a package including a dual spool hydraulic hook up.