The answer is dependant on the size of the track you wish to run on. For an open track with a fair length straight I'd use a 24 or 25 pinion. For a short/more technical track I'd use a 23 pinion.
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Tony Mulligan
DESC410R, DEX410, DEX210, Cream Extreme (the dog's b******s)
www.srcc.co.uk
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