Bottom Bracket
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- Posts: 6
- Joined: Sat May 26, 2012 7:50 pm
Bottom Bracket
Postby mrfuzz » Tue Sep 04, 2012 7:05 pm
Just wondering if anyone has had any issues with Press fit BB ( noisey .come loose)Are they any good .Have read some stories about them .some good .some bad.
- MarkG
- Posts: 2147
- Joined: Mon Mar 28, 2011 2:02 pm
- Location: Perth, Australia
Re: Bottom Bracket
Postby MarkG » Wed Sep 05, 2012 10:44 am
Nope.
Press fit in theory shouldn't come loose.
Bearing cups press in (hence the name) with a Park Tools press, then the crank arms keep it there.
Are you sure the arms are squared up and tight?
As for the noise, winter time = sand and grit and rain, so maybe that's it?
Press fit in theory shouldn't come loose.
Bearing cups press in (hence the name) with a Park Tools press, then the crank arms keep it there.
Are you sure the arms are squared up and tight?
As for the noise, winter time = sand and grit and rain, so maybe that's it?
Proudly "a hater of academics with helmet cams"
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Re: Bottom Bracket
Postby rkelsen » Wed Sep 05, 2012 1:13 pm
Press fit BBs are a cost saving idea dreamed up by frame manufacturers who wanted to make more money per unit.
There is no benefit to the end consumer. It isn't lighter or more efficient.
From a user-serviceability standpoint, it is worse than threaded BBs.
There is no benefit to the end consumer. It isn't lighter or more efficient.
From a user-serviceability standpoint, it is worse than threaded BBs.
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- Joined: Wed Jan 26, 2011 10:18 am
Re: Bottom Bracket
Postby Gordo » Sat Sep 08, 2012 8:44 pm
if i can avoid buying a bike with one i will. i want ease of servicability...especially on my mtb
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Re: Bottom Bracket
Postby mrfuzz » Sun Sep 09, 2012 1:24 pm
Have not got the bike with press fit BB .I have a Trek with a BB90 in it.The BB 90 seems to be a very reliable & hassle free setup.MarkG wrote:Nope.
Press fit in theory shouldn't come loose.
Bearing cups press in (hence the name) with a Park Tools press, then the crank arms keep it there.
Are you sure the arms are squared up and tight?
As for the noise, winter time = sand and grit and rain, so maybe that's it?
The press fit setup seems to to freak me out a bit.does not seem like a good setup.Might be just me
- MarkG
- Posts: 2147
- Joined: Mon Mar 28, 2011 2:02 pm
- Location: Perth, Australia
Re: Bottom Bracket
Postby MarkG » Sun Sep 09, 2012 7:31 pm
BB90 is press fit.
BB86 is the same thing.
Trek call theirs BB90.
What concerns you about it?
BB86 is the same thing.
Trek call theirs BB90.
What concerns you about it?
Proudly "a hater of academics with helmet cams"
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- Posts: 6
- Joined: Sat May 26, 2012 7:50 pm
Re: Bottom Bracket
Postby mrfuzz » Fri Sep 28, 2012 6:19 pm
My Trek has the external bearings threaded BB90.I;m probally worrying about nothing.MarkG wrote:BB90 is press fit.
BB86 is the same thing.
Trek call theirs BB90.
What concerns you about it?
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- Joined: Thu Jul 14, 2011 7:01 pm
- Location: Canberra
Re: Bottom Bracket
Postby usernameforme » Sat Sep 29, 2012 10:32 pm
whats your issue? BB30 cranks and bearings are much lighter. They also give the rider more heel clearance, so they are lighter and for some, more efficient... whats your issue?rkelsen wrote:Press fit BBs are a cost saving idea dreamed up by frame manufacturers who wanted to make more money per unit.
There is no benefit to the end consumer. It isn't lighter or more efficient.
From a user-serviceability standpoint, it is worse than threaded BBs.
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