Quote:
Originally Posted by Rvjimd
My question, do the lower idlers help keep the tracks centered?
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Yep. And I think the bottom rollers should be spaced different than the spacing of the lugs so the track can't slip around them. That way at least one or two rollers and lugs will always be engaged.
Quote:
Originally Posted by Rvjimd
Why are some like this and other like center wheel and knobs on the driver?
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My guess is patents. Someone patents one style so the next guy has to figure out his own way. And always there's the quest for a better mousetrap.