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Cycle information   -  Cranks with 5 chainring bolts

 

Use these bolt spacings to identify your crank's pcd and smallest chainring.
For other 5 bolt cranks:     pcd   =   1.7013   ×   bolt spacing.

5 bolt chart

 

Note

The minimum size of an Oval depends on its ovality - it is greater for ovalities more than 20% and smaller when less than 20%. The minimum number of teeth for 5-bolt cranks may be estimated as follows:

minimum Oval  =       minimum round     
                 1 - ( 0.004 × ovality )

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Wales

CHRIS BELL
Cornant, Cribyn, Lampeter, Ceredigion, SA48 7QW, Wales, UK
chris@cornant.uk

 
©  Chris Bell