Quote:
Originally Posted by SlowOne
What has evolved is a number of classes for beginners, Club specialists and Nationals. For the old 27T class, 17.5 has been adopted. For 19T we now seem to have 13.5BL, and for the old 12T class it's 10.5BL. Mod is still Mod...
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I believe those equivalences are American - in the UK, BRCA has decided 13.5 BL = 27T brushed and 10.5 BL = 19T BR.
The fact that brushless motors are still improving with each new generation further confuses the issue...