Buying Tips for Caster Wheels
Wheelchair and Scooter Caster Wheels
While caster wheels may seem simple, they consist of several components that impact their performance. Before ordering replacements, consider the following:
- Worn Tire: Inspect the tire for cracks, chips, or significant wear. If any of these issues are present, the tire needs to be replaced. Depending on your caster assembly, you may only need to replace the tire rather than the entire caster. Shop our tires.
- Squeaking or Noises: Unusual sounds often indicate worn-out bearings. If the bearings are worn, they will need to be replaced. Shop caster bearing and caster wheel assemblies.
- Spin Resistance: Check if the casters spin freely by giving them a spin. Look for hair or debris caught around the axle, which may restrict movement. Clean the casters thoroughly, remove any obstructions, and test again.
- Bent or Damaged Forks: Examine the caster forks to ensure they are straight and even. Bent forks can prevent the wheelchair from rolling smoothly or in a straight line.
- Balanced Rotation: The caster fork should rotate freely without wobbling. If it wobbles, the caster stem bearings may be worn, or the stem bolt may be loose.
Tips for Buying Caster Wheels
When selecting a replacement caster wheel, it’s essential to consider several key sizing attributes:
- Tire Size: Wheelchair caster wheel sizes include the tire mounted on the rim. For instance, an 8" x 2" caster could consist of a 4" rim diameter with the remaining 4" accounted for by the tire. Check the sidewall of the tire or the side of the caster for size markings, which may be listed in metric, standard, or both. If no markings are visible, you’ll need to measure the size yourself.
- Hub Width: Caster wheels are available in various hub widths. The hub is the solid center portion where the bearings are installed, and the axle passes through. A hub that is too narrow or too wide can cause the caster forks to bend inward or outward. To ensure a proper fit, measure your hub width carefully.
- Tire Type: Tires come in different types, including molded rubber or urethane tires, pneumatic tires with inner tubes, foam-filled tires, and urethane tires. Also note the tread pattern.
- Caster Assembly Type: Caster assemblies generally fall into one of three categories: two-piece split rims with separate tires, one-piece rims with separate tires, or single assemblies where the tire is molded onto the rim.
- Axle or Bearing Size: The axle diameter corresponds to the inside diameter of the caster bearing. Ensure the bearing size matches your axle, as a mismatch will prevent proper installation. You only need to measure the bearing’s inside diameter or the axle’s diameter to confirm compatibility.
By considering these attributes, you can find a safe and suitable caster wheel replacement. The image below shows the measurement points and locations of the topics discussed above.
Installation of the Caster Wheels
Installing a new wheelchair caster involves a few steps. Simply insert the axle through the caster bearings and the fork, then secure it by tightening the lock nut on the opposite side. Depending on the setup, you may find washers positioned inside the fork, outside the fork, or in both locations. The axle head typically faces outward when the wheelchair is pushed forward. Be careful not to overtighten, as this can place excessive strain on the bearings.
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