• May 18, 2022

How Are Bike Chains Measured?

How are bike chains measured? Measuring for chain wear is done with a chain checking tool or accurate ruler/tape measure. 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 my chain size?

To determine the pitch (chain size), you'll need to measure the distance between any three consecutive rivets, then divide the result by 2. The rivets are the small, round pegs/studs that hold the chain segments together. Measure from the first to the third, then divide that number in half to get your chain pitch.

What is a 1/8 bike chain?

1/8" (0.125", 3.18 mm) chain is used on most single-speed bicycles, and bicycles with internal gearing. 3/32" (0.094", 2.30 mm) chain is used on derailer equipped bicycles that have more than 3 cogs at the rear. Even somewhat narrower chain, typically .

Are 7 and 8 speed chains the same?

Shimano, SRAM and Campagnolo all use the same chain with 8 speeds. Chain for 7 speeds is a bit wider – 7.3 mm, while a 6 speed one is substantially wider – 7.8 mm. Going further narrower, like a 10, or 11 speed chain on an 8 speed cassette can and often does work.

What is the difference between 1 8 and 3/32 chain?


Related faq for How Are Bike Chains Measured?


Are 11 and 12 speed chains the same?

This is accomplished by making the outer links of the chain thinner. Ultimately, single-speed chains are the strongest because they can be very thick since there's only one cog at the back. The width of a 12-speed chain is roughly 5.25mm whereas that of an 11-speed chain is 5.62mm. That's a 0.37mm difference.


How many links should a 9 speed chain have?

Generally 6-7-8 speed chains are the same and 9 speed are thinner, more than 9 speed is a bit specialized. The length isn't as important because you will usually have to shorten the chain to fit your bike. The standard chain is 114 pins (56 links) but you almost never need to know this ( I had to look it up!).


How many links should my chain have?

Bicycle drive chain length

A new bicycle chain usually comes with 116 links. This is long enough for the biggest chainrings and for most distances of rear wheel from front chainrings. So for optimal length a new chain is usually shortened from the 116 links that come in the box.


How do you measure a bike chain link?


Are KMC chains better than Shimano?

Summary. The difference between the Shimano chain and the KMC is marginal; your choice will always come to personal preference. Despite the inconvenience of adjusting the chain, the Shimano runs a lot smoother and will provide you with long-lasting use.


Will a 9 speed chain fit 8 speed?

9 speed chain on an 8 speed cassette is just fine; it's the wider 8 speed which won't fit the sprocket spacing on a 9 speed cassette.


Can I use 9 speed chain with 7 speed cassette?

A chain wider than standard will not fit between adjacent sprockets of a freewheel or cassette, though it usually poses no problem in a derailerless system. Thus, you can use a "9-speed" chain with a 7-speed or 8-speed system, or a "10-speed" chain with a 9-speed system.


Does chain length affect gear ratio?

It doesn't matter how much longer the chain is. You pull that much more chain with a big gear. If you want three revolutions of the rear wheel, in 48/16 you have to pull 48 links of chain while in 36/12 you only pull 36. The ratio of angular movement was also off, updated.


What chain should I use for single speed?

1/8" chains are used exclusively for single speed setups.


How do you calculate gear inches?

To determine gear inches when riding, you need to perform a simple mathematical equation. Gear Inch Value = Number of Teeth on the Front Ring / Number of Teeth on the Rear Cog x Diameter of the Wheels.


Can you put a 12 speed cassette on a 11 speed hub?


Can I use 12 speed rd on 11 speed cassette?

- 12 speed shimano uses the same dyna-sys pull ratio as their 11 and 10 speed lines. Mix/match as much as you desire. - the mech is pretty agnostic when it comes to the cassette - it will work with just about anything you throw at it as long as you ride 1xX.


Can I use 12 speed derailleur with 11 speed cassette?

The SRAM 12 speed X01 derailleur has the same cable pull ratio as the SRAM 11 speed XX1 derailleur. This means you can interchange the X01 and XX1 derailleurs between the 11 and 12 gear drivetrains.


How do you measure a sprocket chain?

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.


What happens if bike chain is too long?

If the bike chain is too long it will cause problems when changing gears as you shift gears and the derailleur can't pick up the extra chain length. As a result, the chain may keep slipping off. Your front and rear derailleur are not properly aligned. The chainring, derailleur, or the chainring are damaged.


How do you set a chain length?


How tight should bike chain?

It should be tight enough that it only allows you to move it up and down about one inch. If it is sagging or much looser than that, you need to tighten that chain up. Chains often loosen when a bike does not have a derailleur.


What are the different chain sizes?

Chain standards

Size Pitch Maximum Roller Diameter
50 0.625 in (15.88 mm) 0.400 in (10.16 mm)
60 0.750 in (19.05 mm) 0.469 in (11.91 mm)
80 1.000 in (25.40 mm) 0.625 in (15.88 mm)
100 1.250 in (31.75 mm) 0.750 in (19.05 mm)

How do you calculate chain pitch?

To count the number of pitches in a strand of chain, we would start our count from the first pin on one end of the piece of chain and move to the next pin, which would be one pitch, and then on to the next pin, which would be another pitch, and so on until the end of the strand of chain is reached.


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