I'm hoping somebody can give me an estimate, as until now I've never had to replace them but these have had their day. The back tyres are bald & the front ones are heading the same way.

I use an electric Salsa Quickie, which I'm totally dependant on for independence. The back wheels are solid & roughly the same size as those on a car. The front ones are solid &rougly the same size as those on a standard electric wheelchair.

Sorry about the vague description, but I'm no expert.

Thanks in advance for any help you can offer.