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Wrench size for a P11 fork bolt

Looking for the good wrench size for a bolt that is neither 1/2" nor 9/16". What is the size between?

Both bolt measures are on the attached file.

Thank you for your help.

Attachments bolt-size-jpg
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Hello there,

Your vernier reads 13.35mm so the likely spanner size is 1/4 whit.but I am not familiar with the P11. Whit spanner sizes were common on old British bikes of the sixties and earlier.

Patrick

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I would be inclined to file out a 13mm spanner to fit. Label it 'P11 Fork Bolt Wrench' and keep it with your other special tools in your toolbox.

 


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