My boy essentially loves the heck out of turning pretty much everything into a monster truck.
The motorbike transporter set (60491 )is one of his favourites.
I've added bigger wheels with technic a few ways previously, but looking at this part, the wheel holders are a snap on piece.
Are there ANY alternative wheel holders for this base? Something that'll take a technic axle would be utterly Ideal. Some temptation to buy the full truck base part and get creative with drill/printer but.. if there's a "proper" alternative, first.
18923c01 is the part in the set, there's a few alternatives, all with the grey snap on wheel holders that is clearly a separate piece.