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6.7 Wheels
Replace wheels with PU tyres if the material is crack-
ing or damaged, or when the tread becomes worn down to such an extent that there is only 5 mm of
radius left on the outer edges of the tire.
Replace the casing of pneumatic tyres if it is bald or shows signs of cracking or other damage.
The B500 power wheelchair is propelled by two 14” drive wheels (B500-S: 14“ front drive wheels)
and steered by means of two front steering casters (B500-S: two rear steering casters). The
B500/B500-S power wheelchair comes standard with 9” steering casters. 10” steering casters
are available as an option.
Direct sunlight (UV light) causes the tyres to age prematurely. As a result, the tread surface hardens
and corner pieces break out of the tread.
Avoid parking the wheelchair outdoors whenever possible. Regardless of wear and tear, the tyres
should be replaced every 2 years.
If the wheelchair is parked for an extended period of time or the tyres overheat (e.g. in the vicinity of
radiators or in case of exposure to strong sunlight behind glass), the tyres may become permanently
deformed. Therefore, sufcient clearance should always be maintained from sources of heat, and the
wheelchair should be moved frequently or placed on blocks for storage.
1. Verify the tyre condition in regards to tread, porosity and cracking.
Both the steering casters and drive wheels have two-piece rims that can be separated by re-
moving the Allen head screws.
❒ Plastic tyre mounting lever
❒ Inner tube repair kit
❒ Allen wrench, size 6
1. Let the air out of the tyre.
2. Loosen all ve Allen head screws.
3. Separate the two pieces of the rim.
4. Pry back the casing from the edges of the rim.
5. Push the valve completely through to the inside of the rim and pull out the tube.
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