AndyMark is Aluminum, VEX is Plastic. There are big differences in the load rating.
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Originally Posted by VEX Pro
Load Rating: Conservatively rated for use on 200 lb robots
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- I read this to be 50lbs per wheel set since it is worded in terms of an entire robot which typically has 4 wheels on the ground.
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Originally Posted by AndyMark
Load Capacity: 120 Pounds (rollers don't spin past this weight)
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Therefore it really depends on weight distribution - if the side which will carry 4 totes at once has the omni wheels, you're probably better of with the AndyMark wheels.