Quote:
Originally Posted by Oblarg
It's worth noting that this would be for a traction wheel in a butterfly drive assembly, and thus I'm not too worried about wear on the belts/pulley as we'd be on these wheels a small minority of total driving time.
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Well sounds like a butter fly drive set up would be perfect for 3.5" wheels. The extra .25" clearance over the pulley OD will help keep the pulley and belt safe and since the wheels are capture in a module, you could rise the frame a bit to give it a good gap over the the carpet.
You still don't want the belt the scrape the ground even if its not common. the 3" wheel has no margin for that. Do you need a smaller wheel for more gear reduction?