Our beginners guide to bottom bracket standards! Which one you have on your bike?

[@blackout198341]

The best vid about bottom bracket standards

[@cyclemaintenanceacademy]

Hey, thanks so much for your positive feedback!🙂🙏 I'm glad that you found the video helpful. If you have any more questions or if there's anything else you'd like to see covered, feel free to let me know. Happy cycling!🚲

[@JQuinBalliiin1107]

FINALLY! THIS IS LITERALLY THE BEST VIDEO, watched like 4 videos up until this one snd yours was rhe only one thst made sense, THANK YOU! Edit: I have a cruiser that has no bortom bracket but usually it would have a Ashtabula bracket, im gonna try to take one off s mountain bike that looks like it has the same size bottom bracket snd put it into the other one.

[@cyclemaintenanceacademy]

Thank you so much for your kind words! I'm so glad this video was helpful and that it made things clearer for you. It sounds like you're getting creative with your cruiser bike setup! Just remember about the compatibility of the parts.

[@JQuinBalliiin1107]

@cyclemaintenanceacademy it's working out so far! Do you have a social? I could show you if you want.

[@emilyb7859]

Very helpful video, thank you, the exploded bb examples was great. I'm looking at avoiding press fit and sticking with threaded, maybe the newish T47.

[@cyclemaintenanceacademy]

Hi, appreciate you tuning in! I'm thrilled to hear that you found the video helpful, especially the exploded BB examples. Thanks a lot for bringing the new T47 standard to my attention. It seems like I'll need to update the video, as this standard is gaining popularity. If you're planning to use it, feel free to share your opinion with us!🙂

[@ezzony]

After watching so many videos this one is the best explanation for noobs like me. So I just dismantled my budget bike, weak ball bearing housing inside, crushed. Would these be upgradable to sealed bearings so I don't have to replaced again in 6 months!

[@cyclemaintenanceacademy]

Hi and thatnks for your comment. That's great to hear that you found the video to be the best explanation for beginners like yourself! As for upgrading your bottom bracket, yes that will be possible and would more likely avoid having to replace it every six months.Cartridge bearings are generally low maintenance and perform better overall. Just make sure that your cartridge bottom bracket is compatible. I made a video taht might be of help: kzbin.info/www/bejne/p3jYepyGrLCLmc0. If you have any further questions or need assistance with your bike upgrade, feel free to ask. Good luck with the improvements!🙂

[@sreejithpisharody2216]

HI Eric ! nice video ! I have a Peugeot PS 10 bike frame it has a swiss thread ( the seller told me ) , which modern BB can put in it. Can any one help me ? Thanks

[@cyclemaintenanceacademy]

Hi, thank you for your question and apologies for not being able to geta back to you sooner. Swiss-thread bottom brackets are a bit of a rarity today, as most modern bikes use either BSA (British Thread) or Italian threads for the bottom bracket. Interloc Racing Designs (IRD) makes Swiss-threaded cups for their sealed cartridge QB-55, QB-75 or QB-95 bottom brackets. Swiss threaded bottom brackets use the same basic dimensions and thread specifications as French but uses reverse-threading for the drive side like the British. So IRD supply a French labeled non-drive side BB cup in the Swiss set and an unmarked drive side. I hope this helps

[@Pepin-LB]

hello I know I need a 118mm Lenght sealed bearing cartridge bottom bracket, because I will install a Double crankset. BUT.. why are they all 68mm, bc when I measure my shell on the frame, I have 74mm Will I fit on my frame ?

[@cyclemaintenanceacademy]

Hi, thank you for your question, and I apologise for not responding sooner. It’s great that you know the length of the axle! Yes, some frames do have wider bottom bracket shells. You’ll need to find a bottom bracket that is 73x118; unfortunately, a 68mm bottom bracket won’t work. I hope this helps!🙂

[@shaknit]

I have an old trek navigator and the bottom bracket measures out to be 73x116mm cant seem to find any that size. Any suggestions.

[@cyclemaintenanceacademy]

Hi Steven, thanks for the comment and apologies for not getting back to you sooner. Sorry to hear that you struggle to find the correct axle length replacement bottom bracket. Are there simmilar lengths available for example 73x118? That's ony 2 mm difference which shouldn't have a much impact on your gears. Let me know if you managed to find the correct replacement or if you decided to use a slightly diffrent size and how this works for you.

[@emilkrumin6206]

Nice overview!🎉

[@cyclemaintenanceacademy]

Thank you, glad you enjoyed it 😁

[@aaronstanley6914]

I found a new bike someone threw out missing the berring crank and pedals. How do I know which berring type I have?

[@cyclemaintenanceacademy]

Hi Aaron, thanks for your question. First check if there is a thread in the bottom bracket shell. If there is you can use threaded bottom brackets. If there isn't you will need to fit a press fit bottom bracket. To determine the specific type of threaded or threadless bottom bracket you need, you'll have to take into account the crankset you plan to install. Bottom brackets are designed to be compatible with certain cranksets, so it's important to make sure they match up.Once you've decided on the crankset you want to use, refer to the manufacturer's recommendations to find out which bottom bracket is compatible with it. If you have any more questions or need further assistance, feel free to ask. Good luck with your bike project!🙂

[@aaronstanley6914]

@@cyclemaintenanceacademy thank you "cyclist maintenance academy."

[@abednego91]

Do these numbers ring a bell? BB 2421 and 35-50Nm L BSA

[@cyclemaintenanceacademy]

Hi, and thanks for your question. I'm not aware of BB (bottom bracket) 2421. 35-50Nm is the torque recomendation (how much you should tighten it), L stands for left side and BSA is a british thread.

[@BobaPat]

Still not sure which I need..

[@cyclemaintenanceacademy]

Hi, and thanks for the comment. I absolutely understand, there are many types of bottom brackets, and some of them are quite similar. If you still struggle then it may be a good idea to visit your LBS to ask them for advice. Let me know once you find out which bottom bracket you need. Good luck!👍

[@barfo281]

Why do people say that a square tapered crankset/chainset/bottom bracket is bad? (and why are they called those three different things?)

[@cyclemaintenanceacademy]

Hi! Thank you for your question, and I apologise for the delayed response. You're correct that the square taper system is quite reliable; in fact, it’s one of the most dependable options available. However, advancements in bottom bracket design are focused on reducing weight and enhancing performance.

[@LurkingLeviathan]

Im pretty sure every single bike in the world has its own unique design. Ive been spending the last day and a half trying to find one that looks like mine or the name of the style and its impossible i hate bottom brackets so much

[@cyclemaintenanceacademy]

Hi, thanks for sharing your experience, and apologies for the delayed response. I hope you’ve been able to find the correct replacement bottom bracket for your bike. If so, let me know which one you ended up using. Thanks!

[@dablet]

absolutely ridiculous how many standards there are

[@dawn_rider]

More than a dozen. There seems to be a trend of increasing incompatibility in the modern cycling market. Some of it is incremental 'improvements' but I think there is also an element of vendor 'lock in'. Edit 13Nov2023 : Search for " wheelsmfg Bottom Bracket Standards " for a list.

[@cyclemaintenanceacademy]

Hey, thanks for your comment. Totally get your frustration-it's a maze out there with all these bottom bracket standards. If you ever need help navigating through the standards jungle, feel free to ask. We're all in this bike tech puzzle together! 🚴‍♂️🤔