Old 01-23-10, 03:03 PM
San Rensho 
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Crank size is not determined by height, its determined by pedalling style. In general, you use shorter cranks to be able to spin faster. If you mash, then use longer cranks. The reason fixies have 165s is that the immitate track bikes. On the track, spinning is everything and short cranks allow you to achieve a very high cadence that is also very smooth.
Il faut de l'audace, encore de l'audace, toujours de l'audace

1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
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