Bottom bracket lifespan

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07-04-16 | 08:59 AM

darraghm

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Bottom bracket lifespan

I have a bike with about 3000km on it and in the last few months there is a noticeable creaking off the drive train, really only heard when going up hills excess of 6%.
There is a brand new chain on it, and the chain ring bolts have been tightened numerous times.
The bottom bracket is a BB383Evo, and the crankset has carbon cranks.
When turning the cranks they feel rough and it can also be felt vibrating through the frame.

Is it common for a bottom bracket (assuming thats the problem) to go so early?

07-04-16 | 04:27 PM

Darth_Firebolt

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From: Arkansas

Bikes: All City Cosmic Stallion, Salsa Colossal, Surly Preamble, 1985 Schwinn High Sierra x3

386 evo, maybe?

07-04-16 | 04:36 PM

rpenmanparker

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From: Houston, TX

Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build

The bearings? Sure. Is it press fit or theaded?

07-04-16 | 05:29 PM

datlas

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From: Malvern, PA (20 miles West of Philly)

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Would be unusual but not unheard of. Take the chain off and spin the cranks. See if they feel rough or noisy. If so, you are almost certainly have the problem diagnosed.

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07-04-16 | 06:22 PM

Inpd

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Quote:

Originally Posted by datlas

Would be unusual but not unheard of. Take the chain off and spin the cranks. See if they feel rough or noisy. If so, you are almost certainly have the problem diagnosed.

He already said that it was rough and noisy and he felt vibrations

07-04-16 | 06:23 PM

Bah Humbug

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From: Austin

Bikes: S1, R2, P2

Happened to the girl's bike in less mileage than that. Some heavy-rain rides were all it took.

07-04-16 | 06:32 PM

Wested

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From: Brooklyn, NY

Bikes: CAAD 12, Lemond Maillot Jaune

Brand new chain and creaking? Sounds like your chainrings need to be replaced.

07-04-16 | 07:12 PM

datlas

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From: Malvern, PA (20 miles West of Philly)

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Quote:

Originally Posted by Inpd

He already said that it was rough and noisy and he felt vibrations

He didn't say he took the chain off. Doing so eliminates other components from the equation. If chain is on, could be chain/chainrings/cassette/freehub/RD pulleys etc.

You want to isolate the alleged bad actor. It probably is the BB but you never know.

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