Often asked: How To Determine New Bicycle Chain Length?

How long should a bicycle chain be?

Using a ruler, a new chain should measure exactly 12 inches across 12 links, from middle of pin to middle of pin. The number most commonly agreed on for a worn chain is one percent elongation between links.

How do I know if my bike 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 do I know if my chain is too short?

You should also see two slight bends at each jockey wheel of the rear derailleur. 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.

How do you calculate chain length?

Begin by counting the number of teeth on the largest front sprocket and largest rear. These numbers are often printed right on the sprockets and cogs. Next, measure the distance between the middle of the crank bolt to the rear axle. This is also the chain stay length.

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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.

Why does my chain slip when I pedal hard?

Most of the time, a skipping chain is caused by cable stretch. In the first half dozen rides on a new bike your shift cables stretch the most. They can also stretch over time as you ride. Hippley explains, “It takes cable tension to open a derailleur, which shifts your chain between gears.

What do you do if you cut your bike chain too short?

Registered. To make the chain the correct length, cut one link off the left-over piece of chain that you’ve cut off, buy a second (preferably rivet type) master link, fit them both to the “short” cut chain, and then fit that to the bike using the master link that came with the chain.

Should I shorten my chain?

1 Answer. ” Never run with a chain that is too short, except in an emergency.” (from Sheldon Brown’s Derailleur Adjustment page). If a short chain ends up on the big chainring and big sprocket at the same time, then the derailleur will probably get damaged.

What is the chain length?

The chain is a unit of length equal to 66 feet (22 yards). There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long.

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