Integrated bottom bracket

markwb79

hi,

I want to service and maybe renew the bottom bracket on my Madone. Although I am nit sure where to start with the removal of the old.

I understand it's a integrated BB90 though.

Thanks in advance
Mark

father_jack

Normally you need crank removal tool and bottom bracket removal tool.

What's BB90? New version of BB30? Wish they stop changing the blooming standards. :roll: you have to buy tons of different tools, campag, shimano, sram, bb30, and now bb90 :evil:

markwb79

Dont know how new it is, and if it actually replaces a BB30 as it has been out for a couple of years I think.

http://www.cyclingnews.com/features/pho ... ange/77521

ugo.santalucia

Horrible system, which does not use threads... it means you need a removal tool and a press to fit it... the press can be built with a long screw, and a couple of wood/plastic plates... as for the removal tool, you can try if the one for headset fits, otherwise you'll have to get one... I wouldn't recommend forcing the cups out with a screwdriver the way one would do for headset cups in a steel frame

fosst

Removing the cups is actually not such a dificult job. There is a 24mm hole through which you can put a decent sized bar (I used an old 1/2" drive extension). Don't use a screwdriver unless you want some gouges in the BB shell....
The cups came out with a couple of taps using plastic mallet on the extension bar.
Fitting new cups with a piece of threaded rod, a couple of nuts and washers was just as simple.
Is it just me, but I like this system??

christurbo

Here you go [also for BB90 if you read down:

http://www.bikeradar.com/gear/article/w ... ets-29544/

Ive done it and its easy, use plenty of grease.

Thanks me later.

jgsi

christurbo wrote:

Here you go [also for BB90 if you read down:

http://www.bikeradar.com/gear/article/w ... ets-29544/

Ive done it and its easy, use plenty of grease.

Thanks me later.

I also like bb30.... also like when an article does the workshop biz on the bike I actually have ;-)

Monty Dog

BB90 is actually quite sensible - it's BB30 which is a complete abomination. Anything that uses aluminium alloy for transmitting torque is smoking something and since when did we need a narrower Q-factor, particularly on cross bikes and MTBs.