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bottom bracket noise (airy sound)

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bottom bracket noise (airy sound)

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Old 06-21-10, 12:08 PM
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Jakedatc
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bottom bracket noise (airy sound)

sram rival bb/cranks
It sounds like a frame pump without a tire attached pshhh pshhhh pshhh every revolution.

i rode in some heavy rain over a week ago but i had a ride since then and didn't notice it.

any ideas?
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Old 06-21-10, 12:48 PM
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Originally Posted by Jakedatc View Post
sram rival bb/cranks
It sounds like a frame pump without a tire attached pshhh pshhhh pshhh every revolution.

i rode in some heavy rain over a week ago but i had a ride since then and didn't notice it.

any ideas?
BB bearings are contiminated or devoid of grease.
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Old 06-21-10, 01:53 PM
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Hmm... can i get to Rival BB bearings without a BB tool? i have an 8mm hex which i think gets some of it apart.
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Old 06-21-10, 02:04 PM
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Nope.
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Old 06-21-10, 02:10 PM
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bah.. BB wrench is expensive for what it is..
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Old 06-21-10, 02:35 PM
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Compare cost of wrench vs. cost of having a professional mechanic do the job.
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Old 06-21-10, 04:44 PM
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oh i understand.. it is just a uni-tasker that doesn't get used much and when you ride as a 2nd hobby and you're unemployed, plonking down $ for things that don't get used much isn't high on the list.
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Old 06-21-10, 04:51 PM
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How much are you expecting to pay? Do you have other bike tools?
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Old 06-21-10, 05:22 PM
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i've been looking online and the cheapest i found on ebay was 15 i think. I have a growing collection. it just wasn't expected.. i only have about 3000mi on the crankset. LBS's and REI near me tend to be pricey and RI sales tax
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Old 06-21-10, 06:14 PM
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will either of these 2 fit Rival?

http://www.probikekit.com/display.php?code=T0186

http://www.probikekit.com/display.php?code=T0032
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Old 06-23-10, 12:17 PM
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I use BikeToolsEtc, but I don't know what the shipping to UK would be like.

Park Tool lists its BBT-19 as fitting:
  • Shimano® Hollow Tech II
  • Truvativ® GXP
  • Race Face® X-type
  • SRAM® Force and Rival
  • FSA® Mega Exo
  • Campagnolo® Ultra Torque
so the interface seems to be common, making the tools interchangeable. But then, why would PBK list the one as being unique, e.g. "for FSA® Mega Exo"? I don't know.


What I was getting at with the 'other tools' question is that if you're buying online (and paying shipping), now might be a good time to pick up a small bike toolkit. You'd certainly save in the long run. Something like this, though you should be able to find similar for fewer £. Depends on how many of the tools in the kit you'd eventually want.
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Old 06-23-10, 07:08 PM
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I just look at PBK cuz they tend to have good prices.. i'm not in the UK. I have a bunch of those things in the tool kit so i don't need a whole set. I don't think it was making the same noise today so perhaps i was worried for nothing for now. Thanks for the info and other tool site to look at
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Old 06-23-10, 07:36 PM
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Did you lube the chain after the wet weather? The noise you desribed sounds like a starved chain/drivetrain.
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Old 06-24-10, 01:41 PM
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Originally Posted by Jakedatc View Post
I just look at PBK cuz they tend to have good prices.. i'm not in the UK.
Sorry, I got this thread confused with another. I was actually born in R.I. (I have since renounced my Yankee citizenship.)
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Old 06-24-10, 02:56 PM
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Originally Posted by curbtender View Post
Did you lube the chain after the wet weather? The noise you desribed sounds like a starved chain/drivetrain.
I was thinking the same think. Just because the noise is timed with the revolution doesn't mean it's the bottom bracket. My chain and my shoes both make Psh, Psh Psh sounds after getting wet. Buggered bottom brackets usually click, squeak, grind, crunch, or pop.

That said, the EXO style bottom brackets (I use one as well) are a terrible design. Shimano's are the best, and they are still awful. The SRAM, Truvativ, FSA and Campy versions are all progressively worse. They put the bearings in a very exposed location with insufficient seals and little allowance for proper adjustment (especially the Campy version).

How old is your bottom bracket?
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Old 06-24-10, 03:15 PM
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Hmm.. that could have been it. I thought i lubed up my chain after it went for a shower but maybe i didn't and the one ride afterwards used up whatever was left on it then i did lube it before yesterday's ride and i didn't hear it. Much easier fix for sure
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