[Graham]

Just the one asterisk...I'll take that!

Luckily the motor was of quite low Magnetic traction, so I also took that into account, otherwise it would have gone into the 2 asterisk category.
I would estimate the motor is ~ 1.4mm clearance so not far away. As a matter of interest I also tested one of mine which has the original Slot it C tyres on and not been run, that was also had the same clearance as yours.

However I think you could have used slightly higher profile tyres to give the required clearance of the motor, some proxy scrutineers would not have passed it........