Restoring my BSA M20

[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?

[Wayne Henderson]

Hi Darren,
I had several M20's (ex Australian Army) and two had original, but unusable, tyres. They where from memory Olimpic Patrols and had a cross of squares in the centre of the tyre, kind of looked like flowers, and normal block tread on the edges. Same tyre front and back, 350 x 19.

[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

[Geoff Winnington-Ball (RIP)]

In addition to the BSA M20 I just posted on in the FOR SALE forum, this beauty was on display at the motorcycle show today. I have a hi-res photo of that interesting REME data plate if anyone wants them...

[peter simundson]

I have the original "Canadian Corps Vehicle Serial Numbers and Colour

Markings" sheets. If you send me a PM I will copy and mail you the section on motorcycles.

Peter s