Hollowtech ll Bottom Bracket
- Thread starter koro
- Start date
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2Loose
Guru
- Location
- Loughborough, Leicestershire.
Spooky - I also have a Defy2 (2010) and have just ordered some 68mm Ultegra BB cups from ChainReaction for £15 - cheaper than the lower model 105 version.
It is pretty hard to get to the bearings inside the Shimano Hollowtech BB cups due to quite an akward to get at (and delicate) rubber o-ring seal, so picking out the seal to clean and regrease the bearings is...well, maybe you can manage it with a pin or the pointy end of a stanley knife, but for the sake of 15 quid I won't bother trying.
Hopefully it will banish a new click the bike has developed after 5K miles of all year round riding.
It is pretty hard to get to the bearings inside the Shimano Hollowtech BB cups due to quite an akward to get at (and delicate) rubber o-ring seal, so picking out the seal to clean and regrease the bearings is...well, maybe you can manage it with a pin or the pointy end of a stanley knife, but for the sake of 15 quid I won't bother trying.
Hopefully it will banish a new click the bike has developed after 5K miles of all year round riding.
accountantpete
OAP
OP
OP
koro
Active Member
OP
OP
koro
Active Member
Appreciate your reply....
I had a similar experiance when I upgraded the wheels.... I had im my mind either Eastons or Fulcrums. My lbs put some Fulcrums on, cost way more than the Xero Lites that he said were the way to go. Unless his mark up was way better than on these than the Fulcrums, the Xero as well as being way cheaper. Were in my opinion just as impressive as the Fulcrums. They have been superb.
I think I got caught up in the magazine spiel..... I now ignore the label, and try them out myself.
martint235
Dog on a bike
- Location
- Welling
Have you checked the chainring bolts? Every time I think I'm getting a click from my BB it turns out to be something else....
accountantpete
OAP
Sounds like the BB has worked a bit loose - I wrap some ptfe tape onto the threads to hold them firm.
2Loose
Guru
- Location
- Loughborough, Leicestershire.
Ta for the tip. I guess I will see when I take the existing one off...I may not have to use the new one just yet, but nice to have a replacement to hand just in case.
OP
OP
koro
Active Member
Hi,
Another thought, has anyone just replaced the bearings with better quality ones. Have googled, various ways of doing so...just want to be sure if I were to go same way, I replaced them with correct bearings which were of better quality. Would ceramic be taking it a bit far?
Cheers
Another thought, has anyone just replaced the bearings with better quality ones. Have googled, various ways of doing so...just want to be sure if I were to go same way, I replaced them with correct bearings which were of better quality. Would ceramic be taking it a bit far?
Cheers
byegad
Legendary Member
- Location
- NE England
2Loose
Guru
- Location
- Loughborough, Leicestershire.
12 minutes including cleaning the threads (which took longer than I expected) and replacing the chain - I timed it.
Oh yes - many thanks to AccountantPete and his diagnosis, my left BB cup was indeed loose when I tried it earlier, there was also quite a lot of grit inside the thread and behind the cups on that side, which matches the location of the clicking feeling. I will see if that has been resolved tomorrow, so hopefully the Ultegra BB will remain on the shelf for the time being until I have genuinely worn the bearings out (one more winter maybe).
gbb
Squire
- Location
- Peterborough
Kinda answered this on your other post Koro, but to nail it down in detail.
I did my FSA BB. I have access to SKF bearings and you wont beat them in quality without spending an awful lot more.
If you take a standard SKF bearing (-2RS, two seals) and spin it in your hand, you can feel the drag/resistance. Thats no problem of course, they're designed to run at thousands of RPM in motors etc. Its no real problem on a bike.
If you take a low friction sealed SKF bearing (which is -2RSL, although i think that suffix is old now, they keep changing them)...it spins so much more freely, you can really feel it.
The trouble is, for the average guy to get access to SKFs low friction bearings, you're not going to get them off ebay etc, you'd have to go to a bearing distributor...and they're not cheap cheap, if you know what i mean.
