My PT has obtained a wheelchair for me - perhaps a bit earlier than necessary, but I thought I should be prepared and explore its potential.

It works fine on hard surfaces inside and out, and on firm flat lawn. But over longer grass and uneven ground it's pretty useless. The wheels, which are conventional ones - like bicycle wheels, dig in and stop.

Does anyone know if it's possible to get wider wheels and tyres that would spread the load and hopefully roll over rougher ground?