BSA Owners' Club Workshop Discussions

The BSA Workshop => Pre War => Topic started by: PeterinOz on 07 Aug, 2026, 08:45

Title: Hub offset 1940 M21
Post by: PeterinOz on 07 Aug, 2026, 08:45
Is there any offset of either the front or rear hubs?  When I laced them I centralised them and the wheels aligned.  I am going to replace them with SS spokes and wanted to check if anyone knows if there is any offset.  Front forks are girders and rear is rigid.
Title: Re: Hub offset 1940 M21
Post by: militaryron on 07 Aug, 2026, 17:19
Presumably you have the speedo drive on the left side hub? These are the forks that are splayed out on that side. Here is the offset info that I have acquired over the years. Ron
Title: Re: Hub offset 1940 M21
Post by: militaryron on 14 Aug, 2026, 19:39
I guess PeterinOz must have found the information elsewhere! Ron