I'm fine with the figures being overscale - that's what we expect from 28mm. However, cramming 3 oversize figures onto a 'true scale' bike tends to emphasize the scale disparity, which is why I questioned it. And motorcycle troops were common in the early war period, which is why I questioned whether it's worth including figures in mid-war uniforms.
I'm still not convinced on the wheel size. Ignoring the figures, the wheels look small compared to the rest of the bike, when you look at photos of the real thing. The front mudguard, for instance, seems lower than it does in photos. I realise that photos can be misleading, but are Rubicon's designers sure this is right?