What is a bicycle chainline and how to measure it?

[@BikeGremlinUS]

If you have any questions, please use the BikeGremlin forum (I try to respond to every comment, but KZbin sucks at notifications, especially when it comes to any follow-up questions): www.bikegremlin.net/ Relja

[@W_Kolo_Macieju]

Thank you very much for the article and video. He helped me set the correct chain line on my bike.

[@thankmelater1254]

You always have the best explanations.

[@aleksanderiwuc1730]

Many thx for such informative explanation! Grate Video!!!

[@romickva]

Perfect explanation! Thank you!

[@fehehehe]

Care svaka čast za ovo!

[@censorshipBS]

I was always told to use the front small chain ring with the largest gears on the rear cassette and then if i was using the large front to then use the smaller rear cassette rings that way the chain stays straight ❤

[@jurgenmorell5954]

Klasse T-Shirt😂😂😂

[@censorshipBS]

Cant you just use your eyes to look down the chain line to see if its in the correct place?

[@BikeGremlinUS]

If the rear chainstays were parallel to the bike's centre-line, that could work OK(ish). Since they aren't, you can only reliably tell if the chainline is waaay off or not, but you can't tell if it's "only" 2-4 mm off. Combined with short chainstays on most modern bikes, that's still enough to make the chain rub or drop more easily (and get more component wear) in certain gear combinations. Now, a steel rod or a ruler that's not flexible - that works better than just eyeballing it, at least when you get the chain and the front derailleur out of the way. Relja