Bicycle TutorBicycle Tutor

Show off your bike!

Related video tutorials:
Creaking Noise From Bottom Bracket Area
#1
Hello,

I have a Boardman Comp Aluminium Frame racing bike:

Truvativ Elita Crank set with Truvativ GXP cups. Ultegra pedals.

I get creaking from the bottom end when under high strain. ie going up hills. (Although it is hard to locate the sound).

I decided to buy brand new GXP cups to try and start eliminating the creaking sound. These I replaced and find that the creaking has not diminished.

Any idea what the creaking sound is. Could it be the frame or the pedal bearings?

Nevica
Reply
#2
(05-23-2011, 12:44 PM)Nevica Wrote:  .... Could it be the frame or the pedal bearings?
....

Yes. make sure that the BB and pedal bearings are adequately preloaded. Just because you replaced the BB does not mean that the preload is sufficient.
Nigel
Reply
#3
(05-23-2011, 01:38 PM)nfmisso Wrote:  
(05-23-2011, 12:44 PM)Nevica Wrote:  .... Could it be the frame or the pedal bearings?
....

Yes. make sure that the BB and pedal bearings are adequately preloaded. Just because you replaced the BB does not mean that the preload is sufficient.

Preload? Could you explain please?

Nevica
Reply
#4
http://www.nmbtc.com/bearings/engineering/preload.html
http://www.promshop.info/cataloguespdf/kbc10.pdf
http://www.brighthub.com/engineering/mechanical/articles/17347.aspx
Nigel
Reply
#5
(05-23-2011, 12:44 PM)Nevica Wrote:  Hello,

I have a Boardman Comp Aluminium Frame racing bike:

Truvativ Elita Crank set with Truvativ GXP cups. Ultegra pedals.

I get creaking from the bottom end when under high strain. ie going up hills. (Although it is hard to locate the sound).

I decided to buy brand new GXP cups to try and start eliminating the creaking sound. These I replaced and find that the creaking has not diminished.

Any idea what the creaking sound is. Could it be the frame or the pedal bearings?

Nevica


I have also experienced the same problem with shimano xt external bb. Remove the the crank and the bottom bracket from the bike. Clean everything for old grease. Reassemble the bottom bracket with lots of new teflon waterproof grease on the threads and the sides of the external BB. Grease all the surfaces of the spaces too. Keep it nice and tight. Wipe away excess grease. Reinstall the crankset. Should do the trick.
Reply
#6
I found the creak after a long search.

I took my pedals of and greased the threads with copper ease. Now, no more creak!!!!

Nevica
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Bottom bracket... Strange style I haven't seen before? Quixoticish 2 2,837 08-06-2017, 01:37 AM
Last Post: condor
  Replacing a bottom bracket on a Dahon coxen00 9 12,637 06-11-2017, 10:42 PM
Last Post: painkiller
  BMX Bottom Bracket Creaking and Clicking felpel102 2 4,733 10-15-2016, 08:36 PM
Last Post: GeorgeET
  No spindle in the bottom bracket? Jacomo 5 3,828 09-18-2015, 11:11 AM
Last Post: painkiller
  Shimano BB-UN26 bottom bracket torque specs Tranced 5 6,162 09-13-2015, 05:33 PM
Last Post: DaveM
  Help to identify and upgrade Huffy BB bottom bracket rpesq 3 4,481 09-04-2015, 04:35 PM
Last Post: DaveM
  Frozen bottom bracket on Katmando? elmore leonard 8 4,631 05-12-2015, 11:28 PM
Last Post: elmore leonard
  Crank bearing bottom bracket edge 4 4,313 05-08-2015, 10:56 PM
Last Post: edge
  German FAG bottom bracket Konstantin 3 4,460 02-23-2015, 10:41 PM
Last Post: Konstantin
  Bottom Bracket for a 1973 Schwinn Continental cvs1998 6 3,949 01-01-2015, 06:56 PM
Last Post: GeorgeET

Forum Jump:



ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy / Created by Alex Ramon

feed