Car and Track Clearance

Nov 24, 2011
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I keep hearing to keep the weight low, so I was wondering what is the lowest you could go with the bottom of a car without hitting the track in the transition when using 1/4" cubes for weight?
 
Also the higher you drill you axle holes is the thicker your car must be to accommodate for the higher axle placement and to be honest the ability to build a thinner car would probably benefit you more than sinking the car a 1/16 lower to the track which is probably about all you could achieve IMO.