Help with moving robot

Lynxmotion Rovers, Sumo, and Tracked
1

I am part of a group building a 120kg robot. We want to have two powered wheels and are having trouble finding the power and torque for our wheels. We assumed each wheel would we responsible for 1/3rd the weight with a third caster wheel for the last 1/3rd.

postimg.org/image/sl6ovq1j5/
postimg.org/image/jtoi044if/

these are all of our calculations, any help would be very helpful.

2

Hopefully this can help: robotshop.com/blog/en/drive- … -tool-9698
Equations: robotshop.com/blog/en/drive- … orial-3661
The caster does not provide propulsion, so it’s only responsible for supporting the weight.