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RC-Monster Mike
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Join Date: Nov 2004
Location: PA
04.27.2012, 08:53 AM

I am pretty sure the 1st pair of numbers indicate the stator diameter and the 2nd pair indicates the rotor length - a 1717 has 1.7" stator diameter and 1.7" rotor length(magnet). A 1521 would then be 1.5" stator diameter and 2.1" rotor length.
   
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