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How many more chain links do I need?

Old 03-18-22, 01:34 PM
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Dreww10
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How many more chain links do I need?

So this chain was originally spec'ed this length from Specialized with a 52/36 crank. Pictured here is the same chain but crank was swapped to a 53/39 (11-30 cassette). It shifts and rides perfectly fine at this length in every gear combo, even under load, but I'm going to be putting a new chain on it soon and would like to know how many additional links would be ideal for this setup so the RD isn't as far forward at big-big. +2 seems like a good spot, but I also don't want too much slack at small-small. Recommendations?

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Old 03-18-22, 01:41 PM
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Iride01 
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Check the first two replies in this thread......Chain length advice needed

52 ring to 53 isn't that big a change. You might be okay if you have just enough clearance from the jockey wheel to the cogs in every shift position.
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Old 03-18-22, 02:02 PM
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Check with this method on Big:Big.
You want 1-2" slack.

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Old 03-18-22, 03:45 PM
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That's fine. You don't need any more links, but it really depends on what it looks like in small/small. Post a photo of that before I give any final advice.
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Old 03-19-22, 01:27 PM
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tFUnK
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I size chains based on big-big and this is just a 1t change. Sounds like you could get away with the current length, but I wouldn't be opposed to suggesting adding another link. That, if any at all, should be all the lengthening that's needed.
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Old 03-19-22, 01:35 PM
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KerryIrons
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Originally Posted by Dreww10 View Post
So this chain was originally spec'ed this length from Specialized with a 52/36 crank. Pictured here is the same chain but crank was swapped to a 53/39 (11-30 cassette). It shifts and rides perfectly fine at this length in every gear combo, even under load, but I'm going to be putting a new chain on it soon and would like to know how many additional links would be ideal for this setup so the RD isn't as far forward at big-big. +2 seems like a good spot, but I also don't want too much slack at small-small. Recommendations?
Unless your chain was already at the absolute limit, adding one tooth to the chain ring is not an issue.
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