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Old 11-17-11, 12:00 PM   #1
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Exposed Crank Bearings

I am the happy owner of a new Skinny Benny for around-town utility riding.

In going over the bike last night I noticed that there are no dust covers over the bottom bracket. The crank bearings are fully visible on both sides.

Is this a common setup? Is there a way to add dust covers? Was this a serious faux pas at the LBS?

Thanks,
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Old 11-17-11, 12:13 PM   #2
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You talked to the Dealer you got the bike from first, right?

Pictures needed..

all we got is words.. , worth 0.001 of a picture.
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Old 11-17-11, 12:14 PM   #3
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What type of BB does this have, if it's an external bearing type, this how it looks.
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Old 11-17-11, 12:29 PM   #4
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You talked to the Dealer you got the bike from first, right?

Pictures needed..

all we got is words.. , worth 0.001 of a picture.
The LBS is 60 miles away and I'd like to know what I'm talking about - at least a little bit - before I approach them. I'll upload a picture.

Here's a link to the pic. For some reason I'm getting kicked trying to embed the URL.

https://lh5.googleusercontent.com/-l...2011.18.41.jpg

Last edited by McQz; 11-17-11 at 12:32 PM. Reason: Add a picture
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Old 11-17-11, 12:47 PM   #5
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No, that's not right. Call the bike shop and ask if you can email the picture to save you the trip. They ought to agree that the bike is missing at least a seal. Then you can make the trip.

If they disagree, you may want to speak to the bike company.
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Old 11-17-11, 12:57 PM   #6
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Thanks. I'll get in touch with them this morning. We don't get up to Flag every week and certainly don't want to add the cost of a special trip to the low cost of the bike - which was a serious selling point.
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Old 11-17-11, 01:20 PM   #7
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noglider's link to pix .. #5 ..shows an internal type bearing , not an external.
if the blue is the seal on the cartridge bearing, OK.
if its just the grease around the bearing balls, not OK
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Old 11-17-11, 01:35 PM   #8
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Unless this is a track bike or only intended for indoor use, it's definitely missing something. There's no way that exposed bearings like this can be correct.
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Old 11-17-11, 01:37 PM   #9
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It is DEFINITELY a bead of grease.
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Old 11-17-11, 01:47 PM   #10
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You have sent this picture to the shop also, they should re do the job.

perhaps its excess grease sneaking past the seal. you poked it and hit the balls?

I'd stick in a new UN xx cartridge shimano square taper BB of the appropriate length .
and call it good, .. remotely viewing, I'm not sure what that one is..
cannot be cup and cone loose ball ..
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Old 11-17-11, 01:59 PM   #11
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To me it looks like an cup and cone with captive bearings - that's all I ever had in the olden days - I've never seen a naked cartridge BB.
I emailed a copy of the pic to the shop and the manager got right back to me. He said to bring it back in immediately - he couldn't understand how it got on the floor, much less out the door.
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Old 11-17-11, 02:22 PM   #12
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OLD? adjustable cup is steel, and comes down around the axle,
adjustment via a series of holes for the pin spanner, or a hex on the face.
+ there would be a lockring. against the edge of the frame,
but the frame edge, it's still painted.
so you aint got one of those..
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Old 11-17-11, 03:26 PM   #13
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Right! So this is a cartridge and what I thought was a bearing race isn't. I rubbed away some of the grease and there is a seal behind it . It seems to be fine after all.
Thanks all!
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Old 11-17-11, 03:36 PM   #14
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Quote:
Originally Posted by McQz View Post
Right! So this is a cartridge and what I thought was a bearing race isn't. I rubbed away some of the grease and there is a seal behind it . It seems to be fine after all.
Thanks all!
The seal behind the bearings isn't the issue. There is definitely a seal or some sort of cover missing from the outside of the bearing, which is the important dside to protect.
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Old 11-17-11, 03:41 PM   #15
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All of my "better" bikes have a cap of some kind over/around the BB. I looked at a Motobecane and the exposed side of the non-chain BB looks the same (except for the excess grease) as the SP.
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