How to measure a bike bottom bracket

What size bottom bracket fits your bike? This video shows you how to measure a bike bottom bracket so that you buy the right size bottom bracket for your bicycle. There are a few different widths of bottom brackets, and a lot of different widths of axle, and you want to make sure you buy the same size as the one you are replacing. You also need to make sure you buy the correct type of threads, most of which are English, but there are also Italian threads as well. Watch this video to learn how to measure your bike bottom bracket so that you know what size bottom bracket will fit your bicycle.

[MnHondaSi]

This is exactly what I’ve been searching for, for the past month…. Everyone makes it so complicated and you just made it stupid easy. This is from the newbies out here, THANKS

[md]

Thank you for a short and to the point video.

[yoBradyO]

I will always appreciate somebody who cuts to the chase! Trying to revive my 18 year old Haro shift R3. It's not a great bike but it's still in really good shape. So why spend two to three grand on a new bike when I could put $1, 000 into this one.

[TejasToolMan]

thank you! after 10 years finally putting in a quality real bottom bracket, sealed bearings!

[marblox]

Are all sealed cartridge BBs symetrical left and right side length.??? Because many spindles are not.???

[t.p.]

Finally! Clear information on what I want to know. fyi the importance and purpose of the bottom number 124.5mm on my bracket .

[movingcow]

Many thanks from the UK for this superb straight to the point video.

[fulladdo]

Great video, clear concise and no awful music 😂 thank you.

[blaksin]

Thanks man; thanks for no annoying bullshit music and intro nobody cares about; thanks for being straight to the point; more youtubers need to take note

[Lechaysidude]

Thank you so much for this quick easy explanation on measuring the bottom bracket

[DannerPlace]

Thanks to you, I know my 2003 TREK 7500FX takes a 73mm x 122.5mm bottom bracket bearing.

[graboidsaurus]

Are there different measurements on how big that hole for the bottom bracket?

[tugazuga]

does the diameter of the threads vary?

[nght]

Thank you! So clear and concise. Huge help.

[デンショマニ]

straight to the point video. commendable

[brainmegagin]

I bought a new frame that takes a English 68 bb but it doesn’t say spindle length … and it’s new so I can’t measure the old spindle… what should I do contact the maker?

[petter]

Straight to the point!!! Thanks a lot!!

[Nirvezz]

Thank you. Simple video unlike the others.

[backinthedaybmx]

So a bmx with a euro 50 bottom bracket on a small race bike will need what length spindle ? I’m sure it really depends on the crank right ?

[thewhinjaninja]

Very quick and very helpful. Thank you :)