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More BB woes: new cartridge feels rough

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More BB woes: new cartridge feels rough

Old 07-18-13, 03:54 PM
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coolkat
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More BB woes: new cartridge feels rough

Well, after I couldn't get my adjustable BB right, I posted on here, and found my fixed cup was pitted. Replaced that, and the BB was still rough. At this point, it wasn't worth it to me to continue opening up the BB after every ride to try to find the problem. I bought a cartridge BB last night (UN55), and installed it. It feels worse than the adjustable did. Horribly rough and grindy. I did a 40 mile ride today; is there a longer break in period?
Was it my installation method? I threaded the main unit in finger tight, then threaded the other loose cup thing in and really cranked it tight.
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Old 07-18-13, 04:13 PM
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You should tighten the unit hard and then the adjustable cup. I bought that same BB (UN55) and installed it this morning and it was fine. Did you feel the BB before you installed it? Was it smooth or rough?
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Old 07-18-13, 04:37 PM
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I remember thinking that it didn't feel thaaat smooth, but the spindle was fairly easy to turn, and there was no extreme gritty feeling. I just pulled off the cranks, and, again, feels ok, but as you turn it faster, it feels rougher and drier (like a slightly dry adj. BB). I should also say this is the first cartridge I've ever used, if it makes a difference.
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Old 07-18-13, 04:41 PM
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Much of the "drag" you feel is from the spindle seals. They will smooth out with time and miles. As above, tighten the cartridge to full torque first, then snug down the nds cup.
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Old 07-18-13, 04:46 PM
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Your cartridge BB may not be all that new , it could have been sitting at the shop for a few years before you bought . At any point the grease inside has dry up . Return it back where you got and ask for a replacement . Always spin the axle see if it spin smooth before leaving the shop and/or installing into the bike . If it spin smooth before you put it in and it doesn't afterward then you mount it then something went wrong .
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Old 07-18-13, 04:56 PM
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Originally Posted by HillRider View Post
Much of the "drag" you feel is from the spindle seals. They will smooth out with time and miles. As above, tighten the cartridge to full torque first, then snug down the nds cup.
+1. My new BB felt smooth as glass, but there was alot of resistance. I wondered why this was and found that the seals are pressed in pretty tight and add a bit of resistance. After 100-200 miles though, the seals loosen and break in and makes a near frictionless ride without any play.
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Old 07-18-13, 05:00 PM
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It feels fine in-hand, (and feels the same as when I got it). When riding, though, whenever I was pedaling hard, basically whenever I was on the large chainring, it started grinding. Like I said, it's my first cartridge, so I don't know how they're supposed to feel.
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Old 07-18-13, 05:03 PM
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Sounds like your chain ring is rubbing on your derailleur cage. The new bb may be a marginally different width to the old one, changing the spacing.

- Joel
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Old 07-18-13, 05:08 PM
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I redjusted the front derailleur when I installed it.
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Old 07-18-13, 05:10 PM
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Retighten the BB properly and report back.
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Old 07-18-13, 05:30 PM
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Would pedals in need of grease make pedaling feel rough? Seems likely...I will grease my pedals and be back.
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Old 07-18-13, 05:34 PM
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Yeah that's possible. Adjust them properly as well, as improper adjustment; whether it be too loose or too tight; can wear pedal bearings down quickly.
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Old 07-18-13, 07:04 PM
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Just took a test ride, and it was much, much better. Not perfect, but good enough. I'm pretty sure it was my improper installation. The Park Tool website was unclear on if both sides needed to be torqued down. Thanks for all the answers; I always get good info on this forum
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Old 07-19-13, 10:20 AM
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Cool, next time check the box to see if instructions were included.
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Old 07-19-13, 11:23 AM
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^^^ +1.

Instructions included just talk about how improper installation is bad and then give you shoddy instructions. You have to have some previous knowledge of removing, cleaning and installing BB's even if the BB isn't a cartridge one.
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