When ordering slow speed wheels, you need to know a few items:
1. Tire Size, desired capacity, ply rating or load rating?
2. Tubeless or Tube-Type?
3. What is the tire tread?
4. Rim Hub Length - what is the overall length of the hub from outside of bearing to outside of bearing?
5. Hub Offset - is the hub centered or offset? If offset what is the distance from the center of the rim to the end of the hub tube on the male (non-valve hole) side?
6. What type of bearing is needed, ball bearing, bushing, precision bearing, roller bearing or tapered bearing?
7. Bearing Size - what is the outside diameter of the axle the wheel is to be installed on?
8. Zerk Fitting - does the wheel require a zerk (grease) fitting?