These ATR wheels are 6.75" in diameter. They come as pair.  We foam fill these tires with a urethane foam by drilling and injecting the foam through 3 or 4 holes we drill on the back side of the tire.  The tires are placed into a jig to ensure the size is maintained.  This foam filling process takes several applications and typically takes 4-6 business days to complete.  The foam helps the tires support heavier loads.  The shafts are machined aluminum 1/2" diameter shafts with hex ends that fit into the wheel hubs for our Heavy Duty ATR and Enclosed Heavy Duty ATR.  The kits do NOT include the bearings, since that is part of the Heavy Duty and Enclosed Heavy Duty Kits.  This kit includes 2 shafts, 2 lock collars, and 2 foam filled wheels. 

These ARE intended for our:

• Heavy Duty ATR
• Enclosed Heavy Duty ATR

These will NOT work for our:

• Standard IG32 ATR
• Standard IG42 ATR
• IG32 Gearmotor housing
• IG42 Gearmotor housing
• Custom Lenth ATR Side
• Single ATR Motor Mount