There were 15" 16" and 17.5" wheels available.
You can get High Traction tires from Coker for the 17.5".
I converted mine to 17" for better tire selection and went with a General Altimax Artic for plowing snow. I don't anticipate putting a lot of mileage on them so they should be fine for the summer as well.
17" conversions on the rear with 16" temporary rollers on the front. Sold them to clemdaddy.
