Mecanum Direct drive

[fhsroboticsteam]

We are considering building a direct drive config similar to this one by andymark

http://www.andymark.com/ProductDetai...ctCode=am-0485

These would be using the tough boxes from last year and 6" mecanum wheels.

and for the gear boxes we would need to buy theses

http://www.andymark.com/productdetai...ctcode=am-0211

I was wondering if this configuration could support the weight of the robot. It would be putting a lot of strain on the tough boxes.

And would the gear ratio be too high? 12.75:1 with 6" mecanum wheels?
what could happen if our robot is geared too high?