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a car's tires which are air inflated but not relative to a wheelchair's which are solid rubber.

Plenty of wheelchairs have pneumatic tyres, including the ones in the article.

Point taken. I was thinking of the wheelchairs I've seen people pushed around hospitals in which don't necessarily correspond to what people buy for themselves for the long term.

Those are absolutely terrible wheelchairs, built to the specs of 50 years ago, heavy and uncomfortable. They are very difficult to get around in. No one should have to use those.

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