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campy UT....CRREAK-CRREAK...help!
a new-ish set of campy chorus UT cranks and record BB cups.
now that i've accumulated ~100 miles on them, they've begun to CREAK to high-heaven when i'm riding standing and swinging my bike from side- to-side. i've never had a creak problem before using a variety of cranks/bbs (campy NR, campy cartridge, shimano DA cup/cone, shimano UN-XX cartridge, FSA ISIS, FSA mega-exo) installed on a variety of frame materials (steel, Ti, carbon). this frame, a couple year old colnago C40HP, has never had a creaking problem using campy record cartridge or FSA mega-exo BBs. i followed installation of the UT crank/BB to the letter. they were silent for the first ~100 miles, now this... any ideas? |
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#3
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campy UT....CRREAK-CRREAK...help!
just had the BB shell re-faced. it had been faced before, but only
the drive-side as it had used only w/ cartridge bearing BBs w/ the fixed drive-side cup. LBS faced both sides and i re-fitted the crank/bb combo. it's creak- free now riding around the car-park, but we'll know fore sure in a week or 2. w On Apr 23, 1:16 pm, A Muzi wrote: So far, every noise or binding problem we've seen with these style cranksets traced to a BB shell with uneven faces or misaligned threading. Consult your dealer and check with Campagnolo gauges. |
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campy UT....CRREAK-CRREAK...help!
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#5
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campy UT....CRREAK-CRREAK...help!
actually, teflon-tape is SOP for my BB installs, and that was the case
this time as well. the BB insert in the C40 is made of Ti (6/4 i think) and the UT cups are aluminum, so i think my BB shell is fine. David L. Johnson wrote: I imagine that the threads on the frame are now less-than-perfect. Andrew suggests checking that, but another thing you can do is wrap the bb threads with a couple turns of teflon tape (used for plumbing). Excellent stuff. |
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campy UT....CRREAK-CRREAK...help!
On Apr 24, 5:59 am, "w.a. manning" wrote:
actually, teflon-tape is SOP for my BB installs, and that was the case this time as well. the BB insert in the C40 is made of Ti (6/4 i think) and the UT cups are aluminum, so i think my BB shell is fine. David L. Johnson wrote: I imagine that the threads on the frame are now less-than-perfect. Andrew suggests checking that, but another thing you can do is wrap the bb threads with a couple turns of teflon tape (used for plumbing). Excellent stuff. hmmm, the C-40s I have prepped all had aluminum BB inserts, hence the ability to face the BB shell... |
#7
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campy UT....CRREAK-CRREAK...help!
all research and visual inspection shows them to be made of Ti as of
2002. maybe you've been assembling pre-2002 c40s! http://www.velonews.com/race/tour200...es/2636.0.html "The development of the C40 is ongoing. The carbon is now lighter and stiffer, and the stays and bottom bracket have changed since the first of its Paris-Roubaix victories. Early models had aluminum bottom bracket sleeves like most carbon frames. Now, Colnago's titanium sleeve is knurled on the outside and has four teeth locking into notches in the carbon shell (see photo). It is far more expensive, but it is much better; titanium cannot corrode, and it has stronger threads and bonding." Qui si parla Campagnolo wrote: hmmm, the C-40s I have prepped all had aluminum BB inserts, hence the ability to face the BB shell... |
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campy UT....CRREAK-CRREAK...help!
On Apr 25, 2:33 pm, "w.a. manning" wrote:
all research and visual inspection shows them to be made of Ti as of 2002. maybe you've been assembling pre-2002 c40s! http://www.velonews.com/race/tour200...es/2636.0.html "The development of the C40 is ongoing. The carbon is now lighter and stiffer, and the stays and bottom bracket have changed since the first of its Paris-Roubaix victories. Early models had aluminum bottom bracket sleeves like most carbon frames. Now, Colnago's titanium sleeve is knurled on the outside and has four teeth locking into notches in the carbon shell (see photo). It is far more expensive, but it is much better; titanium cannot corrode, and it has stronger threads and bonding." Qui si parla Campagnolo wrote: hmmm, the C-40s I have prepped all had aluminum BB inserts, hence the ability to face the BB shell... Probably. We dumped Colnago about then. |
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