Is it the 6" one? Because that one is too small for a Syrian which is why he may not be using it - it would be uncomfortable and can give them back pain. The 12" one is enormous - and there have been issues with it being stiff and not spinning well, so if it's the big one he may have just given up on it. This is a good basic wheel for a Syrian and not too expensive
https://www.amazon.co.uk/Trixie-Exer...xie+28cm+wheel