I have searched the forum but I cannot seem to find anything that tells me how to tell which chain(520,525,530) my bike has. It has a master link that is obviously bigger than the chain and I know the chain is an RK chain but cant find #'s on any of the links. Wondering if there is a way to measure to get size.

 

Ohhh, that's a tough one.

Maybe you can identify either sprocket, and knowing what sprockets you are using you can find out the pitch distance.

 

Not sure if it is measure by width or from pin to pin??

 

Found this on another forum:

As this question seems to come up frequently, 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]

 

width.

 

kuroshio - excellent info and image.

 

Not me. Just knew where to look