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Use these bolt spacings to identify your crank's pcd and smallest chainring.
For other 5 bolt cranks: pcd = 1.7013 × bolt spacing.
continued on the next page...
The minimum size of an Oval depends on its ovality. It is greater for ovalities more than 20% and smaller when less than 20%. Use the formula on Ovals page 4.
© Chris Bell, 2007
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