- BB creeking…. looking to A. replace whole thing…. B. replace the bearings
my 2012 (5months old probably done about…. 150km ish…) rocky mountain altitude 50 bb started to creek tonight….. according to the information i have found its an shimano SLX hollowtech 2 bb….
A. should i just replace the whole thing?
if so what would you recommend?
B. Should i just replace the bearings???
seen upgrade bearings ect… on ebay anyone got recommendations? ceramic? other options?
thanks for any advice
calumPosted 4 years agotmb467Subscriber
Tbf you can replace the bearings in a shimano BB
Gently prise off the top hat and seal covering the bearings then tap out the bearings from behind
When you order the new bearings, you’ll need some 6805 bearings – I just got the cheapest off eBay at 3.50 inc postage but if they work ok (give em 6-10 months and ill know for sure) I’d consider ceramics for more cash (20 quid should be enough)
Press em in, cover both ends in grease to help seal em better but you’ll need to shave / sand the 1mm lip off the top hat or get new ones from superstar. Reason being is the original bearings have an ID of 6mm. 6805 have an ID of 7mm. The lip fits in this gap and helps seal the original bearing
Seems to have worked so far, after a month of riding. We’ll see what happens in the future thoPosted 4 years agotheblackmountMember
As per tmb467 you can replace them. However, my experience with so called quality units (Enduro) didn’t warrant the additional hassle or cost. These did not last any longer than the Deore units they replaced….
Depends on your mileage / riding conditions but Hope or King sound a far better long term investment.Posted 4 years agobelugabobMember
Forget the above. Creaking is 99% caused by dry/loose threads/mating surfaces. Re-fit the bb properly (grease or anti-sieze on the threads) and I bet the creaks will go.
+1Posted 4 years ago
Also consider replacing the plastic spacer rings with metal ones – http://www.sjscycles.co.uk/mobile/alloy-spacer-for-bottom-bracket-cup-25mm-prod27247/ – they don’t distort as much.mudsoulMember
Sometimes it is tricky to track down the actual culprit of creaks because sound travels easily in bike frames, and they could be mistaken for worn BBs or linkage bearings when they might be just, as cynic-al said, dry threads on BB cups/pedals/skewers.
I had a maddening creak on my Marin that I thought was the BB. Turned out to be nothing but a slightly loose rear QR that needed a little grease on the cam mechanism. Creak gone.
Also, Hollowtech II bottom bracket are serviceable to squeeze a little more life out of them if the bearings are not already rusted. Just pop off the plastic and rubber seals on the cups with a pick and repack with grease.Posted 4 years ago
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