Quote:
Originally Posted by Mr. B
So from the general conversation, I am guessing that most if not all of the drivetrains had a dropped center. If so, can anyone give me some idea how much to drop the center. On the KITBOT we used I believe all the wheels touched? 
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In general, 1/8" - 3/16" are very common drops. Unless you're doing anything fancy, I'd lean towards the 1/8" side. Whenever I design using blue nitrile tread on traction wheels, I go 5/32" due to the extra grip from the blue nitrile. If you're doing pneumatic wheels, then 3/16 is one of the most common solutions. Anything else is 1/8 and you're fine.
*Note other people may have other preferences. This is just the general idea I've gotten from talking to many people about their drivetrain preferences and it seems to be the most commonly accepted one.