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-   -   Newb question: bottom bracket replacement (https://www.bikeforums.net/bicycle-mechanics/846719-newb-question-bottom-bracket-replacement.html)

ClaySwartz 09-16-12 01:29 PM

Newb question: bottom bracket replacement
 
I have an 1960's schwinn bike frame that has a one piece crank and threadleas bottom
Bracket casing.

Without realizing, I bought a cartridge bottom bracket and three piece crankset to match the bB.

My question is, will it be possible to
Use the newer crankset and Bortom
Bracket in my old frame. The frame seems to be threadless where the bottom bracket would go.

Is it possible?

HillRider 09-16-12 03:13 PM

There is an adapter that converts Ashtabula (one piece) bottom brackets to standard English threads. Harris Cyclery has them for about $20. Look here:

http://harriscyclery.net/product/tru...apter-1335.htm

ksisler 09-19-12 03:15 PM

Be sure to follow the direction carefully or enlist a skilled friend to assist you.

cny-bikeman 09-19-12 05:49 PM

Also, the length of bottom bracket axles varies depending on several factors. Hopefully you ordered a crankset that will be compatible with your frame and drivetrain.

Airburst 09-20-12 01:38 AM


Originally Posted by HillRider (Post 14737933)
There is an adapter that converts Ashtabula (one piece) bottom brackets to standard English threads. Harris Cyclery has them for about $20. Look here:

http://harriscyclery.net/product/tru...apter-1335.htm

But you'll have to replace the crank with a set of square-taper cranks, so it'll cost more than that.

dabac 09-20-12 02:45 AM


Originally Posted by Airburst (Post 14753254)
But you'll have to replace the crank with a set of square-taper cranks, so it'll cost more than that.

Check the original post "I bought a cartridge bottom bracket and three piece crankset to match the bB."
Sounds like he already has those parts - assuming he's got the right length for the chain line to line up.

Airburst 09-20-12 04:23 AM


Originally Posted by dabac (Post 14753292)
Check the original post "I bought a cartridge bottom bracket and three piece crankset to match the bB."
Sounds like he already has those parts - assuming he's got the right length for the chain line to line up.

Oops, brain fart...


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