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520/530 Chain Identification
From CycleChaos
Here is a diagram that can be used to distinguish 520 and 530 drive chains.
By using a scale or caliper to measure the roller width between the inside plates, they can be easily identified.
Nominal Dimensions Are:
520 = 1/4" - (0.25") - [6.35mm]
530 = 3/8" - (0.38") - [9.52mm]
- Both chains are standard #50 pitch of 5/8" - (0.625") - [15.88mm]
