FAQ: How To Size Bicycle Chain With Derailleur?

How do you measure chain size?

To measure the chain size, if you have just the sprocket, use calipers to measure between the teeth. Measure from center to center of where the chain roller would set between the teeth that will give you the pitch. Once you know the pitch you can determine what chain size you would need.

Do I need a longer chain for a long cage derailleur?

When working out the length of the chain, deraiileurs aren’t taken into account, hence you don’t need to lengthen it. When you add a larger cassette or chainring then yes.

What size chain Does my bike need?

If your bike is equipped with the derailleur, you need a 3/32″ or 11/128″ chain. If you have a single-speed or internally geared bike, you need either 1/8″ or 3/32″. You should get the correct size, but if it is not possible, you can get the 1/8″ because it has limited compatibility with the 3/32″ sprocket.

What is the difference between.325 and 3/8 chain?

The three-eighths chain is a beefier saw and better suited to one that has more horsepower. It has larger teeth and a heavier duty chain, so it requires more horsepower to operate correctly. 325-inch chain for those saws between 40 and 60 cc.

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How do I set the size of a chain link?

Chain Link Sizes: How to Measure Chain Link Sizes

  1. Pitch is measured by finding the distance from the center of one pin to the center of the next pin in line.
  2. Determine your side plate height and thickness by measuring both inside and outside the roller chain to ensure that you’re seeing a good average size.

Does derailleur affect chain length?

In short, the wrong length derailleur cage will make determining proper chain length nearly impossible. Too much chain length and you’ll have shifting issues and suffer from dropped chains, but too little could rip your bike’s derailleur right off.

Is MTB chain too short?

If the chain is too short, this shift is difficult to make and the derailleur cage is stretched out and almost parallel to the chainstay. If the chain is really short, then you might not even be able to shift into the largest cog. Before you remove the chain, make sure it’s on the small chainring and smallest cog.

How do you know if your MTB chain is too long?

Do a simple check on your bike by shifting the chain to the big chainring and the biggest cassette cog; then, push on the end of the derailleur cage (pushing forward) to see how much it will move forward. If it moves just a little, then you’re good. If it moves a lot, then you’ve got too much chain.

How long is a 520 chain link?

D.I.D 520 Standard Series Chain – 110 Links, Chain Type: 520, Chain Length: 110, Color: Natural, Chain Application: All 520 x 110.

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How can I tell if my bike chain is stretched?

Another ballpark method for checking chain wear is by measuring it with a ruler. Pick a rivet and line it up at the zero mark. Count 24 more rivets and your last rivet should be at the 12″ mark of your ruler. If it is off by more than 1/16″ your chain is stretched to the point of replacement.

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