Quote:
Originally Posted by Samk
Our team had decided to use 8 wheels, all of them 8 inch andymark wheelchair ones(non pneumatic), as to be able to turn, the center 2 on each side were supposed to be lower by .1 of an inch. Some mentors brought up a concern that we would be too tippy with this design, we were under the impression that this is common to do. Any thoughts on whether to drop the center two or not? Also, we got all the blocks mounted, and found that though the shafts were true, most of our wheels had significant wobble, and they are brand new straight from andymark. Any thoughts on how to combat this? as it seems to cause major problems when chain is put on.
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In a drop centered wheel configuration you will have some rocking. As far as being tippy, that is more a function of the Center of mass than if you have a slight drop center (although the drop center does exacerbate the issue). many teams use a drop center approach to 6 & 8 wheel designs effectively.
Wheels should not wobble, and you need to find out why yours do. I'd suggest looking at how your shafts fit through the hubs and make sure that your bearings are pressed in properly (assuming dead axles since you mentioned chains).