bb30 in old frame

aljohn · Post by **aljohn** » 25 Oct 2016, 9:17pm

I have a Shimano square taper bottom bracket in a Dolan alu frame , about 15 years old. Does a bb30, or any other system, fit the older, standard , bottom bracket thread ? I ask because I've seen a lot of FSA chainsets with bb30 or hollow tech bb"s...and crucially, they are pretty cheap. I fully expect to be disappointed , I'm happy to use Shimano kit but it's nice to have plenty of choice.

rick99 · Post by **rick99** » 25 Oct 2016, 9:32pm

Best summary.

http://www.sheldonbrown.com/cribsheet-b ... ckets.html

It'll be an English threaded bottom bracket, so lots of modern systems will work. Bb30 is not one of them !

I'm a trendy consumer. Just look at my wobbly bog brush using hovercraft full of eels

Valbrona · Post by **Valbrona** » 26 Oct 2016, 3:34am

Shimano Hollowtech II cranksets will fit. You will have to buy a new HTII BB to fit one.

BB30 cranksets do not work with regular threaded BB shells.

Gattonero · Post by **Gattonero** » 29 Oct 2016, 9:38pm

Valbrona wrote:Shimano Hollowtech II cranksets will fit. You will have to buy a new HTII BB to fit one.

BB30 cranksets do not work with regular threaded BB shells.

"native" BB30 chainset yes, but there's BB30 chainsets with a longer axle, also the 386 standard, those can rely on external cups (like a Hollowtech2 cups, but bigger)

martin biggs · Post by **martin biggs** » 29 Oct 2016, 9:50pm

ok whilst we are talking about bb's , does a hollowtech crankset fit in a press fit bottom bracket ?

Gattonero · Post by **Gattonero** » 29 Oct 2016, 9:55pm

martin biggs wrote:ok whilst we are talking about bb's , does a hollowtech crankset fit in a press fit bottom bracket ?

Most likely yes, there's a jungle of adapters. You can even convert a BB30 to BSA threaded if you wish so.
"press-fit" is a very generic term, you need to specify the shell ID and width.

Brucey · Post by **Brucey** » 29 Oct 2016, 10:28pm

many of the possible choices are listed on this page

http://wheelsmfg.com/complete-crankset-bb-adapter-guide

cheers

martin biggs · Post by **martin biggs** » 30 Oct 2016, 9:22am

Brucey wrote:many of the possible choices are listed on this page

http://wheelsmfg.com/complete-crankset-bb-adapter-guide

cheers

thats looks like a good site thanks

garibeet · Post by **garibeet** » 31 Oct 2016, 7:45pm

Hope do an external bottom bracket that will fit and is available as a 30mm axle diameter, which means a bb30 chainset will work with it.
I have one on a bike, works as a standard external BB(24mm) would.

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