If the speedo drive from a VF with a 16" front wheel were fitted to my B’ol how far out would the speedo read? When I’m doing an indicated 60 it feels more like 80 and I’m comming up behind cars like they’re not moving. I’d appreciate your thoughts.

I think I’ve worked it out - at an indicated 100 you’d be actually doing 112. If I’m right then 60 would be 67. I’m going to check the speed with a satnav cos plod will have me!