Tech Tuesday #17: Chain Sizing: The Easy Way & The Hard Way

Calvin runs through the two ways to size a chain in this #TechTuesday.

Questions or comments? Leave them below!


Get a more in-depth look at chain sizing with our Repair Help video:

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Since our founding in 1963, Park Tool has been the leading name in bicycle tools. Our YouTube channel is an extension of our mission to be the ultimate resource for mechanics and riders of all skill levels. Here you will find comprehensive repair help tutorials for a wide range of components and processes, as well as troubleshooting guides, tips and tricks, and information on the latest Park Tool products.

[cookeecutkk]

That is, by far, the most straightforward and concise video I've found on YT for this thing.

Many thanks!

[danshome-wh]

It can often feel like everything in my life is a complete nightmare. However, your well throughout out videos are a silver lining in the chaos of disappointment. Thank you for empowering people worldwide to repair their bikes in a simple, hassle-free manner!

[josereneducharme]

Thanks for sacrificing yourself for the advancement of education.

[davidt]

Im building a bike at the moment. This guy is my new dad

[elnino]

I've been having an issue with my chain slipping since I got a new cassette and chain installed. It's been back to the shop and checked out and they found nothing wrong, I watched this video separated the chain and measured. The chain was a whole inch too long. Removing the extra link fixed the issue for me.

[No_motor_angler]

Def best video out for this. I just sized a chain using “the easy way” and it works perfect! Thanks again Park Tool and Calvin!!

[Frostgiantbutsmall]

Thank you so so much for making this as clear and to the point as possible

[Habaneroranger]

Worked like a charm! This advice was contrary to what my LBS gave me. They told me to put everything on the smallest cog. I went with park tool and glad I did

[LasseGreiner]

Always a relief when Calvin and co have made a video on a topic. Thanks!

[ToastRunnerHere]

"There has to be a better way" - epic! Thanks for your sacrifice! :)

[danfuerthgillis]

Remember with bigger jockey wheels you will need a longer chain regardless of what is shown in this video. If you have oversized jockey wheels and you cut the chain the normal length the bottom jockey wheel will push the derailleur too far forward thus making shifts harsh. On 7x3 systems ( altus oversized jockey wheels derailleur) I needed to use an 8 speed chain with only 2 links not used.

[MilesDavis]

I'm not usually into horror films, but I keep going back to 2:08 because it's such a relatablably thrilling moment :)

[terrysmith]

Thank you: clear humorous and fully educational.

[Multrakiller]

I took the old chain and matched it with a new one, counting the links to match and that worked nicely as well.

[maximiliangutmann]

This is exactly what I was looking for, thanks. My Scapin Atec comes back to life!

[cccorlew]

I was so ready to do the hard way. You saved me! Thanks!

[johnreese]

Good to see you again. Thanks to you and Park Tool for the great video! I own quite a few Park tools and am very satisfied with them!! 😁

[michaelgaudette]

I buy Park Tools specifically because of these videos.

[carnivorouslee]

I have to say I do love your tools park.

[Nwrig]

Hands down the best sizing video! This works for ANY 2 x Shimano