Restoring my BSA M20

[rewdco]

Originally Posted by Darren Witty

I have recently bought a WM20 and it has odd tyres on it with 3.25-19 on the front and 4.00-19 on the back. The trend pattern isn't the same either. I have looked at different pictures but can't see a common tread. Does anyone know what the wartime 'issue' tread would have looked like and the size and possibly the maker?

Darren,

There's a very interesting section about war time military tires on the Norton 16H website: http://www.wdnorton.nl/Tyres.htm . I'm pretty sure that the tires used by BSA and Norton were more or less the same.

Regards,
Jan