Which shortcuts should be in our library and which not?

[Roland Melkert]

Although some kind of formatted keyword could solve that problem.

I would find the presence of the simple wheel+tyre assemblies more helpful.
Doing that avoids all the hassle of
- having to define a new syntax
- adjust all the parsers
- make people understand how that is intended to work

It wouldn't need a new meta/syntax just a keyword which is present in both a tyre and any of its matching wheels.