Quote:
Originally Posted by rcpower
a novak 6.5r, but I guess nowadays with 45c 50c lipo rating you can easily use a 7.5 or 8.5 and with bigger pinion get the exact same results...(and perhaps longer runtimes)
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Yeah, I used to run a 6.5 + 20C, now I run 7.5 and occasionally 8.5 with a 45C.
There are other options, for example you could run less timing on the motor, that would allow you to use a bigger pinion, or a bigger rotor.
But either way, if you're having to use a 21 or 20T pinion, then most likely a 7.5T would be more suited to your track.
Another possibility would be to use an AE spur since you can get an 81T, but that would require the use of AE slipper pads.