Converting Bottom Brackets: American to BSA - Tuned Up

Truman is in the shop with some time on his hands! Why not convert an American-style bottom bracket to BSA? Follow along as Truman takes us through some bottom bracket converting.
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[@Joe_from_iowa]

Thanks for the tip about lining the two sides up using the 3 mm t-handle wrench!

[@tenpennyguy]

This taught me about retaining compound and variations in BB shell size - thanks!

[@pauljames4510]

Truman's the man Love my RC-1 for putting my mid BB in my frame and TLR-1 for bolts to stop them vibrating loose

[@michelepirovano4135]

Great piece of knowledge to pass on! As usual!

[@joepalovick1915]

Great Video! It explained the conversion process perfectly. Thanks.

[@flor.e.cultura]

I Love videos along this lines!!

[@dineshhanda2301]

Nicely explained, Trueman. Regards.

[@ck2503]

AHHH SNAP - Been needing this one!

[@PJSinohin]

Got the parts. Thanks for this, revive an old Banshee Scratch.

[@hunterwright386]

I love how they were playing around about

[@ed0078]

Good catch Park Tool®

[@parktool]

Should have caught it earlier. Feeling pretty bad right about now.

[@ed0078]

@@parktool - 😄. Keep up the great videos we do love them, I learn something every time. Thank you Park Tool®.

[@DeCookingTouch]

nice and very informative

[@onemad.targaryen.rages.respect]

Just did this conversion on a '74 schwinn varsity and put all modern shimano parts on it. I hammered in the bracket cups though oopsie!

[@NeoPayneHK]

thanks

[@nicolasribes8394]

Really good video

[@ericabando3351]

Nice

[@paisfr]

Hello Bonjour , Thank you Park tool ! ✌👌😊

[@stellarpod]

Great instructional video. I have one suggestion: when installing the non-drive side, and after you've taken care to align the treaded holes, wouldn't it be wise to orient your press tool such that the spinning portion is on the previously-installed side, rather than the non-drive side so that you don't risk inadvertently spinning the holes out of alignment as your spinning the press tight? Just a thought. As always, thanks much for sharing. Steve

[@parktool]

Good thought. The handle side has a plate that uses a teflon bushing to allow it to stay stationary with the cup while the handle spins. This reduces the potential for the issue you brought up.

[@juluisreyes9094]

Nice..

[@thuongvan4672]

tôi là người việt và cũng có rất nhiều người Việt Nam học hỏi từ kênh của bạn nó thật sự hữu ích cho chúng tôi, mong Park Tool sẽ có phụ đề Tiếng Việt để chúng tôi có thể hiểu sâu hơn về các bạn. Thank your very mach.

[@andreybatashov2183]

The HEX wrench lifehack is spot on!!!

[@MaplePanda04]

Which video covers the new XTR crank install that we briefly see in the intro?

[@gianpaololufrano9014]

Can you show me how to disassemble the shimano crankset spider?

[@RoderickGMacLeod]

@Park Tool If those parts are really tight, how about putting them in the freezer and heating up the bottom bracket with a heat gun before pressing them in?

[@parktool]

A fantastic trick that will usually get the job done.

[@ed0078]

Good idea

[@rodrigog.c.6047]

MUCH MUCH MUCH i need more muches here

[@tycarter3123]

Agreed! He thinks we know as much as he does almost. Be more clear on the parts please. I think he put american cups in 1st to accomidate a euro cup. Euro bb's have to screw into place. If it cant screw into the frame I guess u grab amer cups. Fuckin hybrid bottom bracket n shit.

[@BEWFlash]

LOVE this vid, TruVativ adapters came this morning. I’m doing this conversion on a 2006 Redline MX 24, how would I find out the torque specs for this particular bike for the BB adapter bolts? Tubes are chromoly, but wouldn’t the torque be more of a guess?

[@parktool]

The torque spec on the 3 bolts is 5NM. The bottom bracket torque will be dependent on the bottom bracket used but is typically somewhere around 40Nm.

[@BEWFlash]

@@parktool Thanks!

[@tristandesade8635]

Good video. Still I find terms „american“ and „european“ BB a bit misleading. There are numerous different BB standards originating on both sides.🤔

[@dapor4920]

great vid links to parts would be nice :)

[@downersup2]

Is there a way to convert say Technique 181mm Cranks with American BB and 25mm spindle to fit a newer BMX frame with mid sized BB's like a Hyper Wizard, S&M, Subrosa...etc.???? Thoughts?

[@parktool]

It is a bit surprising Technique does not have an adapter for this. A threaded adapter could be made, similar to the Campagnolo adapters. The Mid bb's uses a 41.2mm bearing. Road bikes offer various options for the 24, 25 and even 30mm spindles for similar shells. Contact Technique. Otherwise a good machinist can make anything....for a price.

[@jamie-kd9tx]

whooaaahhh that first title... close one

[@tonyhruzek4250]

How would you check to see if either side of the BB shell needed facing?

[@parktool]

The best way to tell if a bb needs facing is to start facing it. The initial cut will tell you how off the BB is and wether or not you should continue.

[@jandanieltrebo6845]

The book is it in italian?

[@cedricmartin538]

Good day Park tool, I just want to ask what frame is that?

[@parktool]

That is an On One Gimp.

[@owenmorris4182]

Hi

[@cyberstar251]

does it matter which side goes on where? or are the threads for the adapter halves mirrored?

[@parktool]

It matters very much. The drive side is a Left Hand thread, and tighten counter-clockwise. The non-drive side is right hand threaded, and tightens clockwise.

[@cyberstar251]

@@parktool and which parts are those? is the one where the 3 bolts go in the right or left side?

[@christianjohndeguzman6278]

may i know the brand of that bb conversation kit?

[@parktool]

This one is from Truvativ.

[@NewYorkRawVideos]

is it a good idea from a chemical safety standpoint to handle and mix chemicals with bare hands and fingers?

[@waffenfreund]

Is it enough to Put Grease on the Cups?

[@parktool]

Grease will be perfectly fine in that area.

[@waffenfreund]

@@parktool thanks mate👍

[@alisterbeveridge6110]

I have never heard a BSA bottom bracket being referred to as Euro. Is it not more commonly called English thread as opposed to the Italian thread and others used in mainland Europe. Does BSA not stand for Birmingham Small Arms? The company that invented it which is of course in England.

[@parktool]

It is common in BMX to call BSA or English threaded bottom brackets "euro" bottom brackets. We bring it up in the video as most of these adaptors have "euro" in the name, so if someone wants to look for one it may be easier to find with that in the search bar. Yes Birmingham Small Arms is what BSA stands for.

[@alisterbeveridge6110]

@@parktool thanks for the explanation, can you tell I know nothing about BMX.

[@winerrider]

@@parktool no, it’s Birmingham, not British.

[@parktool]

Correct. Apologies.

[@winerrider]

@@parktool Well, that balances out (sort of) the 100s of things I’ve learned from you guys!

[@emanemon1022]

Please insert subtitle indonesia🙏

[@petertran8216]

First Time super early😅

[@ianpawluczkowycz4674]

but also 1st

[@luigiprovencher8888]

And why would you want to do that?

[@puro52]

theres a whole bmx bb category?! ffs

[@ViperSRTnACR]

Yes. For BMX BB standards you have American, Mid and Euro. For spline you have everything from 6 or 8 splines up to 48 which is fairly standard like on Profile cranks.

[@ethannishimura2619]

@@ViperSRTnACR Don't forget Spanish and Ashtabula!

[@puro52]

@@ViperSRTnACR spline? were talking freehub/wheel click-sounding spline? in all of my cycling thats nothing we talk about. roadies talk about freehub-sound but thats more a schlong-messuring kinda thing

[@michielnooren2076]

A punch? What do you mean? Doesn't Calvin have a specific type of PT for this type of BB????????? This can't be happening!!!

[@parktool]

There may be something coming.

[@edouardrenaud5517]

ok but let's talk about this man's flow shieee truman is gonna make hockey players jealous

[@Manetty6]

"HELLLOO HAMBINI FANS, and welcome!"

[@3693G]

A five year old could install a BB properly.

[@Manetty6]

@@3693G you mean, that (!) five year old :D

[@wammo12345]

But Truman got through it without saying anything rude LOL

[@wammo12345]

@@MrJeanpaul1988 good point about width, I’m guessing the American big bore BB standard doesn’t necessarily match any common or standard threaded BB width?

[@ianpawluczkowycz4674]

2nd

[@mikkopulkkinen751]

Final step: throw the wreck to the bin where it belongs to

[@3ATGL]

Do we have to listen to the lame Muzak in the background ?

[@Swarfega79]

I see a Park Tool video but all I hear is the Cart Narcs KZbin channel.