How To Know When To Change Your Chain, Cassette And Chainrings

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Your bike chain, cassette and chainrings will all wear out eventually, but how do you know when to change them? Here's our guide.

A newly minted drivetrain makes your bike feel great, and keeping on top of chain wear and old parts on your bike will make for cheaper repalcements as our chain wears faster than the cassette and chainrings.

Measuring chain stretch or wear can be done with a specifc tool, a ruler or just by pulling the chain.

Chainrings generally last a long while - and the tell tales sign is "shark's teeth". The cassette is similar - "shark's teeth" or "ghost shifting" just after you've changed your chain.

Making sure you change your chain, cassette and chainrings as they wear will ultimately make your riding cost less, so get measuring your chain now!

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Since watching Oz Cycle's Youtube channel, I've switched over to lubing my chains with paraffin (candle) wax. My whole drivetrain stays clean, and you can handle the chain without getting dirt on your hands. I have three chains on the go for any one bike, and swap them out around every 200 (dry) miles, a process made so much better by the lack of oil and grease. Even the drivetrain on my hybrid bike, which I commonly use on light trails, stays clean.

charlestoast

I love these how to's! Starting to treat my bikes with a bit more TLC, which is making them last longer and ride like new all the time. Thanks GCN!

roooooar

Serviced my hub bearings yesterday with your instruction video. Smooth as a baby's bum now! Keep up the great work

JTS

I ruined my cassette in about 500km when I just started cycling and used no lube or clean my bike at all riding in really dusty conditions
Definitely learned my lesson and now I keep my drivetrain immaculate

KeenxLimit

That trick for checking the cassette is gold. My chain was skipping right after I changed the chain and I thought it was improperly indexed. After indexing it was still skipping. I tried the trick at 3:32 and indeed my chain was lifting. Thanks GCN!

PMoney

Excellent! Nice clear close ups and explanations. Thanks.

FightingThroughPodcast

Stumbled across this video after replacing my chain, brake pads and disks, glad I did after watching. Thankfully my cassette is still good so all that needed was a thorough clean.

ContactFault

You guys have videos for everything! I love it. Thank you.

meliss

You will get more life from the cassette and chainring by replacing the chain often. Whatever wear level you replace the chain at, that is the level the cassette is now worn to. An advanced method is to replace (don't throw away) the chain say, every 500 miles (to keep things simple in this example). Do this with 3, maybe 4 chains. (Do this technique only on a new cassette) Then go back to the first chain with 500 miles and install that again and run for 500mi. Repeat again with the other chains, doing the same thing again at 500 mile intervals. The cassette will basically wear to the most worn chain but in this case you get to do it with 4 chains. When all 4 chains reach the .5 or .75 wear level (whichever spec you use), it will then be time to replace the cassette with the idea being you get more mileage from the 4 chains and cassette than you would have going the traditional route.

GNX

It's because of videos like this, why I love this channel.
Keep it up GCN Team!

reillystuff

Thanks Si, you just answered all my questions - just changed my chain yesterday and now it skips. Bike-saver!

charlificity

the 8 inch measure is precise. Thanks for varied info! cheers GCN!

You guys rock for all your hard work in your videos. So helpful!

TheHAPHAZARDENT

Great video and easy to understand. Big up!

abbisalmi

Awesome video, in fact I just had to replace my chain and cassette because it wore out without me knowing how to measure it...now I do, actually, after it wore out, I just bought this steel chain verifier to avid it from happen again...had I known that a simple ruler would do the job...Thanks a lot Si!

brunokabbaz