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Old 15-11-2009
b4pete b4pete is offline
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hi guys, as a rule of thumb, what size? for a 7.5 brushless??

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Pete
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Old 17-11-2009
b4pete b4pete is offline
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Old 17-11-2009
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i4n i4n is offline
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Sensible answer - I don't own that car but so people can give you a sensible answer try adding information such as:

1) Size and type of track (big, open and flowing/short and twisty/combination of both)
2) Is it indoors or outdoors
3) Big jumps, little jumps or no jumps
4) What is the track surface (carpet, astroturf, grass, ice)
5) What size Spur are you using
6) What type of tyre will you be using
7) Is is a bonded or sintered rotor in the motor

Stupid answer - if you put a bigger one on it'll go faster but accelerate slower and if you use a smaller one it'll go slower but accelerate faster.
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Last edited by i4n; 18-11-2009 at 08:32 AM. Reason: Amended the typo of ‘bugger’ to ‘bigger’ in my facetious comment…
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Old 17-11-2009
Richard Lowe Richard Lowe is offline
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Depending on the motor, start around 23/81 or 22/78 and go from there
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