If you are referring to the AndyMark mecanum wheels, you may want to take a look at the weight of the 10" wheels.
7 lbs per wheel for aluminum = 28 lbs in wheels alone!
14 lbs per wheel for steel = 54 lbs in wheels alone!
When compared with the 8" model however:
2.5 lbs per wheel = 10 lbs in wheels
*This is less than 1 steel 10" or 2 aluminum 10" wheels.*
Price is also a HUGE factor:
$710 for a set of 10"
$310 for a set of 8"
Direct from the 8" page:
Quote:
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Tension on the roller can be adjusted by loosening or tightening the 12 Nylock rollers on the perimeter screws. Tighten the nylock nut for a more restricted roll. Loosen the nut for a more freely spinning roller.
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The friction should be no problem what so ever as the wheels are completely adjustable. Many teams have had great success with the 8" version. I personally see no reason to go all the way up to the 10".