Administrator
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5/8 x 1/4 and 520 chain are one and the same the first being the imperial measurement while the second is the modern way of recording the dimensions.
first number 5 = 5 x 1/8th's i.e 5/8
Second number 2 = 2 x 1/8th i.e 2/8 = 1/4
Check your sprocket sizes for chain length hopefully you are on 17 front and 36 rear which may require a half link so buy a bit extra and also a half link to start and cut to length.
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