[IndySam]

I really don't understand why everyone says mecanum wheel won't get a grip on the ramp. Mecanum wheels have no more problems with grip than any other rubber wheel on polycarb.

On the other hand, hitting the ramp crooked can cause difficulty because of the disruption of the vectors when one wheel hits the ramp causing other wheels to loose contact with the ground. This can be a big problem especially for chassis without much flex.

I think mechanum wheels will have less trouble with the bump than the ramp because of the natural tendency of the flat bump to actually straightening out the robot when hit.