Front wheel wanted

[Paul Langton-Rogers]

My C5 has a flat front tyre and the wheel and tyre condition might not be great and probably needs replacing.

Can anyone recommend a source for 12" wheels+tyres?

I'm not fussed on whether it's original C5 or something entirely different.

Is it possible to fit a 16" wheel to the front instead of 12" or would this cause problems with the balance and steering of the C5?