Tires
 

If you are looking for large tire try imexrc.com they have tires that are 6.2 in OD 4.6 in W 2.8 in ID and 5.5 in OD 3.2 in W 2.8 in ID also 4 in OD 2.5 in W 2.2 in ID versos tread designs may be your ticket. Ed