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Another BB30 creaking problem

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Another BB30 creaking problem

Old 09-30-12, 07:32 PM
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cmcgarvey
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Another BB30 creaking problem

So the last two rides my BB would start to creak whenever I would hammer down on the right side. Today it was more apparent and would happen when really pushing from both pedals. After my ride I took my my crankset off and after getting my bearings out I noticed two things. The first was an alarming lack of any sort of grease/lubricant inside the bottom bracket. The second being that my left side bearing, while spinning freely wasnt smooth. So, I know that pry sooner then later I will need to replace the bearings. I put some locktite 640 inside the shell where the bearing sit, pressed them back in and tightened everything down to spec. Took a good hard spin around the block and its smooth and quite. Now, the real reason for this post is I just found this item on amazon:
https://www.amazon.com/Truvativ-Assem...=bb30+bearings
Now, I know ceramic bearings are typically double-triple the cost of steel. So why are these so cheap? I can not find anything about them online except they are made by SRAM supposedly. Just wondering if anyone has experience with these or if they are worth even giving a shot.
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Old 09-30-12, 07:44 PM
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I got those truvativ bearings with my sram red crankset. I suspect those were the oem bearings. You can get bb30 bearings from most bearing supply houses for under eight bucks
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Old 09-30-12, 07:53 PM
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Originally Posted by pdedes View Post
I got those truvativ bearings with my sram red crankset. I suspect those were the oem bearings. You can get bb30 bearings from most bearing supply houses for under eight bucks
Well, I am just wondering if $25 ceramic bearings are worth getting over steel that would be the same price or cheaper.
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Old 10-01-12, 04:30 AM
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Originally Posted by cmcgarvey View Post
Well, I am just wondering if $25 ceramic bearings are worth getting over steel that would be the same price or cheaper.
No.
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Old 10-01-12, 06:13 AM
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why dont you give it a try ... anyway it'S just 25$ ...
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Old 10-01-12, 06:16 AM
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Ceramic will not solve the problem. Re-install the bearings and use loctite to hold them in place. That will fix it.
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Old 10-01-12, 07:34 AM
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Should have used loctite 641, thats the stuff that is designed for the job.
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Old 10-01-12, 08:26 AM
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Originally Posted by topflightpro View Post
Ceramic will not solve the problem. Re-install the bearings and use loctite to hold them in place. That will fix it.
I know ceramic will not solve the creaking. I was referring to the the fact that one bearing was not spinning smoothly.

Originally Posted by lazerzxr View Post
Should have used loctite 641, thats the stuff that is designed for the job.
Oh really, I had read to use 640, I hope when I need to I can get the bearings out. Thank you for correcting this.
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Old 10-01-12, 10:07 AM
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Originally Posted by cmcgarvey View Post
I know ceramic will not solve the creaking. I was referring to the the fact that one bearing was not spinning smoothly.
If the bearings are not spinning, replace them with new ones. But, while ceramic reportedly spins better, BB30 ceramic is known for having a ridiculously short lifespan.
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Old 10-01-12, 10:21 AM
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I have never been impressed with my BB30 crank.

I posted a thread in "Mechanics" about it last week.
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Old 10-01-12, 10:30 AM
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Make sure to verify the inside and outside diameter as well as the width of the bearings to insure you get the correct bearings.
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Old 10-01-12, 10:40 AM
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Originally Posted by cmcgarvey View Post
So the last two rides my BB would start to creak whenever I would hammer down on the right side.
BB30 is the future! The creaking is just part of the future!

I only get about a year out of my BB30 bearings as well. I got the SRAM BB30 kits.
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Old 10-08-12, 02:07 PM
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Hi, I had this problem with my synapse but it got warranted before I fixed, since then I gotten a cannondale supersix with a BB30 and after about 600 miles it started to creak (yesterday ) so I went for the fix today . Used Loctite 641 and put it all together , now I'm going to let it cure and give it a try tomorrow or the next...
CMC went right out for a ride and all worked out but the loctite site says to let it cure ... crossing fingers will report back....
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Old 10-08-12, 02:51 PM
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What is it with all this "creaking" I keep reading and hearing about BB30? I am really worried, since I intend to buy a new frame/bike soon, and Cannondales have caught my attention.

What is going on? Untested/unreliable technology? Or, is it installer/user error(s)?
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Old 10-08-12, 07:45 PM
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Originally Posted by Jed19 View Post
What is it with all this "creaking" I keep reading and hearing about BB30? I am really worried, since I intend to buy a new frame/bike soon, and Cannondales have caught my attention.

What is going on? Untested/unreliable technology? Or, is it installer/user error(s)?
Hi, I have 2 cannondales the Evo with pressfit BB30 = no creaking and a regular supersix that just started and also use to own a synapse that creaked Never had a chance to fix the synapse but did so the supersix today , I haven't ridden it since the fix but should work as others have had success . It took me 45 minutes taken my time ...I had the right tools ...used loctite 641
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Old 10-08-12, 08:13 PM
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I have 3 bikes with BB30 (Technically 2 with BB30 and one with PF30). All I can say is that I have had no creaking here. I believe that the majority of creaking actually comes from a different location, or poorly installed bearings/ cranks.
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Old 10-08-12, 08:21 PM
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Originally Posted by dnuzzomueller View Post
I have 3 bikes with BB30 (Technically 2 with BB30 and one with PF30). All I can say is that I have had no creaking here. I believe that the majority of creaking actually comes from a different location, or poorly installed bearings/ cranks.
That's great that you have no creaking I'm sure a lot of people don't but if you use the grease or loctite fix and it goes away , well then there is your problem..... Press fit BB30 "s are NOT known for creaking
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Old 10-08-12, 08:52 PM
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Originally Posted by ducati hyp View Post
That's great that you have no creaking I'm sure a lot of people don't but if you use the grease or loctite fix and it goes away , well then there is your problem..... Press fit BB30 "s are NOT known for creaking
Wait......what?
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Old 10-08-12, 09:08 PM
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If one can isolate the creaking to the BB and eliminate things like pedals, saddles, chain ring bolts (whoch are the usual suspects) then the creaking tends to be a function of a poor fit / poor machining that allows the bearing to move ever so slightly under load, this causes vibrations and creaking.

Loctite only corrects in the tens of a thousandth range and this is generally enough to make the bearing sit properly and not move where it interfaces with the frame.

A poor fit is often the cause of premature wear... a less than perfect alignment between the left and ride side bearing will cause the spindle to offset and create unbalanced loads that will quickly destroy the cartridge from the inside.

A cartridge bearing BB should last much longer than a year although a year is very subjective as for one that might be 10,000 km of daily riding and for others it might be riding on sunny weekends in nice weather... using time is a poor measure to describe longevity of a part (it makes my nits in the shop)... if you don't use a cartridge bearing it will last forever.
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Old 10-09-12, 03:59 AM
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2nd that ... couldn't of said it better myself... BTW I did check all those other items first... If you do a search on BB30 creaking you'll be amazed at how many people have had the same problem and see there fixes... I hope this helps.... not trying to start a debate ...

Originally Posted by Sixty Fiver View Post
If one can isolate the creaking to the BB and eliminate things like pedals, saddles, chain ring bolts (whoch are the usual suspects) then the creaking tends to be a function of a poor fit / poor machining that allows the bearing to move ever so slightly under load, this causes vibrations and creaking.

Loctite only corrects in the tens of a thousandth range and this is generally enough to make the bearing sit properly and not move where it interfaces with the frame.

A poor fit is often the cause of premature wear... a less than perfect alignment between the left and ride side bearing will cause the spindle to offset and create unbalanced loads that will quickly destroy the cartridge from the inside.

A cartridge bearing BB should last much longer than a year although a year is very subjective as for one that might be 10,000 km of daily riding and for others it might be riding on sunny weekends in nice weather... using time is a poor measure to describe longevity of a part (it makes my nits in the shop)... if you don't use a cartridge bearing it will last forever.
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Old 10-09-12, 07:42 AM
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Originally Posted by cmcgarvey View Post
Oh really, I had read to use 640, I hope when I need to I can get the bearings out. Thank you for correcting this.
640 is fine. Any retaining compound will work. Your only problem is that you took it for a spin right after you did the job. You have to let it sit for 24 hours with 640 to cure. There are some primers that can speed up cure time but they are expensive.
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Old 10-09-12, 06:52 PM
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Hi, I went for a short sprint up the road and back today after doing the loctite 641 fix on my BB30 yesterday and no more creaking.. I'm happy now and should be for a long time like others (and shops) who have done fix....
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Old 10-09-12, 10:04 PM
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BB30 is on the way out. Check out the specs on the new 2013 bikes, they are going to different systems with PF30 seeming to be the most popular.

For sure, Shimano will not be embracing it. Give it a few more years and it will have quietly disappeared.
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Old 10-10-12, 09:39 AM
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Originally Posted by DinoShepherd View Post
BB30 is on the way out. Check out the specs on the new 2013 bikes, they are going to different systems with PF30 seeming to be the most popular.

For sure, Shimano will not be embracing it. Give it a few more years and it will have quietly disappeared.
Except it will still be creaking on my bike.
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Old 10-10-12, 09:59 AM
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Originally Posted by NWS Alpine View Post
640 is fine. Any retaining compound will work.
FYI, Cannondale recommends Loctite 609 for BB30 creaking problems. From the Loctite Technical Data Sheet:
LOCTITE 609 is designed for the bonding of cylindrical fitting parts...Typical applications include rotor to shafts in fractional and subfractional horsepower motors.
Does that apply to BB30?

Cyclindrical fitting parts: check.

Subfractional horsepower motor: check.

The Cannondale BB30 Tech Note
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Last edited by terrymorse; 10-10-12 at 09:59 AM. Reason: typo correction
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