If it's down to a choice, I'll take the slap.
Happy to see you have it sorted,and its great to have a forum like this where we have access to the answers we're looking for so easily.
I think the thin rubber on the front bogie wheel probably helps to keep the track on when the carrier is in a turn situation and is probably less likely to shed the rubber than a standard wheel in the same situation.
Cheers,
Lynn.
