Climbs killing my BB?
#1
Senior Member
Thread Starter
Join Date: Jun 2014
Location: Connecticut
Posts: 72
Bikes: Trek MTB, Fit Bike Co. Mac 3, Shogun 100
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Climbs killing my BB?
Hey guys. Two weeks ago I went for a 60 mile ride on my ss. I got onto the last 20 mile stretch and my BB started squeaking. When I got back I took it to my LBS and had him look at it. Turns out I had a bad BB and he replaced the bearings. I chalked it up as wear and tear and was happy to have it fixed for $20. Well Saturday I rode a century. The first 30 mile everything was fine, and then I started hearing the familiar squeak again. I have not taken my bike into the LBS yet on account of two weeks of vacation leaving me broke, but I am wondering if maybe I am damaging my BB due to lots of torque being applied to it on climbs. I live in a rather hilly area, generally every road has a slight incline or decline and we have plenty of roads that have short periods of very steep grade.
On the 60m ride I rode a 10% grade for 4 miles and on the 100m I rode a 15% for 3.5 miles with a total gain of 5000+ feet.
If I only rode here in CT I think I'd be okay, but I go to school in VA on the side of the Appalachians and so I have a tremendous amount of incline to deal with there. D you think my squeak could be on account of the high torque being applied on the climbs? If so, could you recommend a solution, such as a BB designed for ss or for climbs?
On the 60m ride I rode a 10% grade for 4 miles and on the 100m I rode a 15% for 3.5 miles with a total gain of 5000+ feet.
If I only rode here in CT I think I'd be okay, but I go to school in VA on the side of the Appalachians and so I have a tremendous amount of incline to deal with there. D you think my squeak could be on account of the high torque being applied on the climbs? If so, could you recommend a solution, such as a BB designed for ss or for climbs?
#2
Calamari Marionette Ph.D
BBs can handle the climbing, and your new BB is probably fine. Take it back to the same LBS and ask them to investigate and remedy.
#4
I'm usually cranky
Join Date: Apr 2010
Posts: 397
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Might not be the BB. I had a similar issue happen a few years ago, on an old Nishiki conversion, and after a lot of investigating at a local shop, the mechanic found that there was a small crack in one of the lugs around the BB.
#5
It's MY mountain
Join Date: Sep 2006
Location: Mt.Diablo
Posts: 10,002
Bikes: Klein, Merckx, Trek
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quoted: 4338 Post(s)
Liked 2,980 Times
in
1,617 Posts
Torque doesn't ruin BBs, and you're not applying that much torque and not for very long.
Misalignment and lubrication problems ruin BBs. It's possible the LBS botched the installation, or it might not be the BB at all.
Misalignment and lubrication problems ruin BBs. It's possible the LBS botched the installation, or it might not be the BB at all.
#6
Member
Join Date: Jan 2013
Posts: 28
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Try a different rear wheel. If the noise continues its the BB if not it's your rear hub that needs to be serviced. I had the same thing happen to me last week and it turned out it was just water had gotten into the hub. They sound almost identical.
#7
Grumpy Old Bugga
Join Date: Oct 2006
Location: Adelaide, AUSTRALIA
Posts: 4,229
Bikes: Hillbrick, Malvern Star Oppy S2, Europa (R.I.P.)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 370 Post(s)
Likes: 0
Liked 8 Times
in
6 Posts
The problem with that theory is that squeaks can come from anywhere and due to the acoustics of tubing, just sound like they're coming from the BB. I learned this after chasing one 'BB' squeak that turned out to be my saddle (drop if oil under the nose) and another that was the spokes in the wheel (good retension fixed that). One thing's for sure, it's not the climbing.
#10
What happened?
Join Date: Jun 2007
Location: Around here somewhere
Posts: 7,927
Bikes: 3 Rollfasts, 3 Schwinns, a Shelby and a Higgins Flightliner in a pear tree!
Mentioned: 57 Post(s)
Tagged: 1 Thread(s)
Quoted: 1835 Post(s)
Liked 292 Times
in
255 Posts
I had the tube come apart twice on my Rollfast, but it's sixty years old and had to be cross braced, something I doubt you will ever have to do.
Get a friend (or two) to ride close and help you spot the source, or put it on a stand and try to work out the location. If it goes away, it could well be your saddle telling you it's not happy.
My directional hearing stinks in regards to anything but my stereo.
Get a friend (or two) to ride close and help you spot the source, or put it on a stand and try to work out the location. If it goes away, it could well be your saddle telling you it's not happy.
My directional hearing stinks in regards to anything but my stereo.
__________________
I don't know nothing, and I memorized it in school and got this here paper I'm proud of to show it.
#11
Grumpy Old Bugga
Join Date: Oct 2006
Location: Adelaide, AUSTRALIA
Posts: 4,229
Bikes: Hillbrick, Malvern Star Oppy S2, Europa (R.I.P.)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 370 Post(s)
Likes: 0
Liked 8 Times
in
6 Posts
Chasing squeaks is like herding cats sometimes. Not a bad idea to just give the whole bike a full service (ie, everything) and hope it fixes the squeak. If nothing else, you know your bike's in tip top condition which, considering the riding you've been doing, isn't a bad thing.