Our '06 Robot had some nice wide BrecoFlex tracks and those signature FDM sprockets we love to use... no traction problems there.
which reminds me... once i was driving the '06 robot in 2nd gear (14 ft/s) on the huge basketball court at one of the high schools in our township... on those nice smooth floors you sure can get some speed... it was all fun till i tried to take a turn and made some chainsaw-looking-skid marks on the floor thanks to the tracks...
thank goodness for water and elbow grease
-q