638C2RS100 Pr1mo Precision Wheelchair or Scooter Bearing (8x28x9/11 mm)

The 638C2RS100 Pr1mo Precision Wheelchair or Scooter Bearing (8x28x9/11 mm) is used on a variety of wheelchairs and scooters and features a maintenance free design.

Product Features

• Maintenance free design and pre-greased
  
• High quality double shielded design keeps grease in and contaminants out
  
• Replacement for bearing reference numbers 638C2RS100
  
• Inside Diameter (bore): 8 mm (also referred to as 5/16")
  
• Outside Diameter: 28 mm
  
• Width (thickness): 9 mm (not counting inner bearing race)
  
• Width (thickness) of inner bearing race: 11 mm
• Sold individually (each)

Special Size Note
The inner diameter (bore) of this bearing is 8 mm. The inner race thickness extends beyond the outer race thickness. The wheelchair and scooter industry commonly refer to the inside diameter of this bearing as 5/16".

Fitment Notes:
This bearing is used on a variety of power wheelchairs and scooters plus many non-mobility related items. Commonly used by Pride Mobility for several of their wheelchair caster assemblies found on several Quantum and Jazzy models. Verify the reference number is Primo 638C2RS100.

General Wheelchair and Scooter Bearing Notes:
Many bearings found on wheelchairs and scooters have a alpha numeric reference or just a numeric reference number stamped on the side of the bearing which refers to the type and size of the bearing. In most cases, that is all you need to purchase the correct bearing. For alpha numeric reference numbers ending in Z, ZZ, RS, or 2RS, they are all interchangeable (Z and ZZ refer to a metal outer side shield and RS and 2RS refer to a rubber outer side shield protecting the balls inside the bearing). If your bearing has no reference on it, you will have to measure. If the bearing reference appears worn off, you may be able to see it stamped on the other side. Click the "Fitment" tab for more information on how to identify or measure your bearing.