Chains

KMC X11 ketting 11-voudig 118 schakels

This KMC X11 is an 11-speed chain with 118 links in grey. A common length for many road and gravel bikes with an 11-speed drivetrain.

What you get

KMC X11 chain
11 speeds
118 links, grey colour

Why a new chain?

The pins and rollers of a chain wear, so the chain seems to stretch and the pitch grows beyond the standard 12.7 mm (half an inch). A worn chain sits badly on the teeth and wears the cassette and chainrings with it. Replacing it in time costs less and is simpler than replacing everything at once.

You measure wear with a chain checker. As a rule of thumb, replace an 11 or 12-speed chain at about 0.5 % stretch and a 9 or 10-speed one at about 0.75 %. Past 1 %, the cassette probably needs replacing too. A chain typically lasts around 2,000 to 5,000 km, depending on lubrication, weather, rider weight and how you shift.

The number of gears decides the width. The more sprockets on the cassette, the narrower the chain must be: about 6.6 mm for 9-speed, 5.9 mm for 10, 5.5 mm for 11 and roughly 5.2 mm for 12. A chain made for a different number of gears shifts badly or touches the next sprocket. Always pick the number that matches your cassette and shifter.

You close chains with a quick-link or a special connecting pin. A quick-link opens and closes without tools, which makes washing and replacing easy. Some brands make quick-links for single use, others reusable ones. Read the instructions that come with the product.

Chains for 9 to 12 gears compared

The more gears, the narrower the chain. That affects wear and how the chain closes.

Gears	Width (approx.)	Replace at stretch	Quick-link	Watch for
9-speed	About 6.6 mm	About 0.75 %	Usually reusable	Sturdiest, forgiving with dirt
10-speed	About 5.9 mm	About 0.75 %	Usually reusable	Common on older and mid-range bikes
11-speed	About 5.5 mm	About 0.5 %	Single-use or reusable, per brand	Measure carefully, keep it clean
12-speed	About 5.2 mm	About 0.5 %	Often single-use or a special pin	Narrowest, wears faster, system-specific

A general guide. Dimensions and wear limits differ by brand, so follow the manufacturer’s figures.

Choose it if

You want a 118-link chain for an 11-speed drivetrain
You like a low-key grey chain
Your chain looks worn or jumps over the cassette when you push hard.
Your chain checker reads about 0.5 % (11 or 12 gears) or 0.75 % (9 or 10 gears).

Choose something else if

Your bike needs a shorter chain, for example with a small cassette and compact setup
You do not know how many gears your bike has. Count the sprockets on your cassette first.
Your chain is new and shifts well. Wait until the chain checker says otherwise.

How to fit a chain

Check the number of gears
Count the sprockets at the back and check that the brand and range suit your drivetrain. Choose a chain for the same number of gears.
Remove the old chain
Open the quick-link with quick-link pliers, or push out a pin with a chain tool. Note how the chain ran, or count the links.
Set the length
Lay the new chain beside the old one or follow the manufacturer. For a new chain, check it works on the biggest chainring and biggest sprocket without tensioning. Remove extra links with the chain tool.
Route and join the chain
Thread the chain through the rear derailleur and join it with a quick-link or the supplied pin. Respect the running direction if the chain shows one.
Check and lube
Flex a stiff link and turn the pedals. Check every gear, lube the chain and wipe off the excess.

Good to know

Count the links on your old chain before ordering
A quick link is not mentioned, so check whether you need to buy one
The number of gears must match the cassette and shifter. An 11-speed chain on a 12-speed cassette will not work.
Join the chain with the part the manufacturer prescribes. A quick-link for a different number of gears can break or skip.
Measure the chain regularly. Wait too long and the cassette wears too, which makes the job much more costly.
Some chains have an outer side or a running direction. Fit it as marked.

Also available as

The same product line with a different size or version, compared on price per unit.

Version	From
118 links You are viewing this one	€25.25
114 links	€35.99

What you get

Why a new chain?

Chains for 9 to 12 gears compared

Choose it if

Choose something else if

How to fit a chain

Check the number of gears

Remove the old chain

Set the length

Route and join the chain

Check and lube

Good to know

Also available as

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