Some Andymark HiGrip wheels, after surviving a season of Aerial Assault. Here is one of them, temporarily on one of our new swerve modules.
I fell like your swerve drive is going to move like it’s from Lunacy.
“May show minor signs of wear”
And I thought ours were bad with 1/8" of rubber left.
A little too worn to recycle for another year, I’d rush in another set…
I thought we wore ours bald last year in Orlando…
Rivet some wedgetop on there and keep 'em running! 
Put a little oil on it, it should move like a breeze!