[Abrakadabra]

1) VexPro wheels are significantly improved. In one of the other mecanum threads, someone posted a spec showing that the plastic part that was prone to breakage last year is now steel reinforced.

2) This year is not last year. You're going to be traveling much slower with (hopefully) many fewer impacts, especially impacts where your whole robot is thrown up in the air.

OTOH, this year you might be toting around an extra 60 pounds at some points, but again, that should be much more of a static load, rather than a dynamic stress.