Hi can anyone tell me what size the wheel rim on a bsa wm20 should be 18" or 19" and is it the same for the front and back? thanks keith.

email (option): keithsprague@hotmail.co.uk

Hi Keith,

19" front and back, 3 / 3.5" tire.
A small amount of 18" rims to a sidecar contract.

Noam.

email (option): noam10@gmail.com

Hi Noam thank you i thought it was 19" just checking before i buy some i seen cheers keith.

email (option): keithsprague@hotmail.co.uk

And there were 18" rims on the 1944 RAF contracts C10655 and C14052 ! Total 509 bikes

email (option): viaconsu # planet dot nl

Be careful if looking at unknown rims as they are unlikely to have the correct piercings.

Half-width drums make for lots of possibilities.