Welcome guest, is this your first visit? Click the "Create Account" button now to join.

To disable ads, please log-in.

Shop at TeamEstrogen.com for women's cycling apparel.

Results 1 to 11 of 11
  1. #1
    Join Date
    Apr 2009
    Location
    Tucson, AZ
    Posts
    4,713

    Seriously? Bottom brackets

    To disable ads, please log-in.

    I just replaced the bottom bracket. Again. This bike is three years old and on its third BB. I don't think I'm too rough on my bike, and I don't make a habit of riding in rain. What's going on, and what can I do to slow the rate at which my bike appears to eat bottom brackets?
    At least I don't leave slime trails.
    http://wholecog.wordpress.com/

    2009 Giant Avail 3 |Specialized Jett 143

    2013 Charge Filter Apex| Specialized Jett 143
    1996(?) Giant Iguana 630|Specialized Riva


    Saving for the next one...

  2. #2
    Join Date
    May 2007
    Location
    Columbia, MO
    Posts
    2,051
    Can you get a higher quality bottom bracket? I wore through a few because I haul a heavy grocery trailer.
    2009 Trek 7.2FX WSD, brooks Champion Flyer S, commuter bike

  3. #3
    Join Date
    May 2011
    Location
    Southeast Nebraska
    Posts
    470
    Get a better bottom bracket. You'd have to talk to you LBS about which kind you'd need. It's not you.

  4. #4
    Join Date
    Sep 2008
    Location
    Beautiful NW or Left Coast
    Posts
    5,645
    I Was told that my BB was good for 10,000 miles. And it wore out at almost exactly that!! (I was proud of that, actually!)
    I like Bikes - Mimi
    Watercolor Blog

    Davidson Custom Bike - Cavaletta
    Dahon 2009 Sport - Luna
    Old Raleigh Mixte - Mitzi

  5. #5
    Join Date
    Nov 2005
    Location
    Between the Blue Ridge and the Chesapeake Bay
    Posts
    5,226
    I've never worn out a bottom bracket. Maybe I'm not riding enough.

  6. #6
    Join Date
    Apr 2009
    Location
    Tucson, AZ
    Posts
    4,713
    The thing with getting a higher-quality BB is the fact that I'd need new cranks, and that's not worth it at this point, when the bike will likely be relegated to backup in the next year or so. (But don't tell her I said that. )

    And there's still some creaking going on, but I can't tell where it's coming from. My guesses are either seatpost/saddle, or handlebars. I swear the LBS in Cincy, despite being very "corporate", has done the best job with this thing out of anyone I've taken it to, not counting the store I bought it from.
    At least I don't leave slime trails.
    http://wholecog.wordpress.com/

    2009 Giant Avail 3 |Specialized Jett 143

    2013 Charge Filter Apex| Specialized Jett 143
    1996(?) Giant Iguana 630|Specialized Riva


    Saving for the next one...

  7. #7
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,645
    Yeah, I don't know. Something like 13-14,000 miles on my current BB. I didn't track mileage back in the day but there had to have been at least 25,000 miles on my old race bike's BB. I wonder if there's an issue with the frame that your BBs aren't getting installed straight??
    Speed comes from what you put behind you. - Judi Ketteler

  8. #8
    Join Date
    May 2012
    Location
    Maryland
    Posts
    355
    I'm sorry your having this issue. I don't have advice because I don't even know what that part of a bicycle is. ha. Yesterday my chain slipped off and I was lucky to fix that on my own. It's high time I find a workshop but...there aren't except two hours north of here.

  9. #9
    Join Date
    May 2011
    Location
    Southeast Nebraska
    Posts
    470
    Bottom Brackets are funky. My teenage son's Rockhopper's BB is crap. It's a 10-15 dollar one and he's broken his 2-3 times last year and and once part of this year. Then the left crank fell off because the BB had been stripped. The whole crankset needs replaced. Makes me mad as I spent a LOT of money on this bike because I know he loves riding and realizing it's a "cheap" bike in the cycling world. And no, like you, he's not abusing the bike.

    Kind of sucks you can't just get a better bottom bracket w/o having to buy an entire new crankset. I'd probably just keep replacing it for now. My son's Rockhopper creaked/popped as well.

  10. #10
    Join Date
    Apr 2009
    Location
    California
    Posts
    371
    Quote Originally Posted by Owlie View Post
    The thing with getting a higher-quality BB is the fact that I'd need new cranks...
    Bottom brackets come in different quality levels. You shouldn't need to change your crankset to install a "better" BB - unless you are already using (and wearing out) the better BB's.

    Some online research shows that your crankset uses a square taper bottom bracket. Shimano currently offers at least two grades of square taper BBs: The cheaper UN26 and the better UN55 (nee UN54). Sadly, Shimano no longer makes the even better UN7x and UN9x BB's, but many of their features have now been incorporated into the UN5x series. There are other brands too, some cheaper and some better.
    Laura

  11. #11
    Join Date
    Apr 2009
    Location
    Tucson, AZ
    Posts
    4,713
    Shop installed a UN55, and I think that was what the previous BB was too, as the prices were similar.

    One of the mechanics at work (different shops, since the shop I work at has been backed up of late (head mechanic has a lot of personal stuff going on)) can't figure out why I'm chewing up bottom brackets at this rate. He said that since the bearings are sealed, getting rained on shouldn't make a big difference...
    At least I don't leave slime trails.
    http://wholecog.wordpress.com/

    2009 Giant Avail 3 |Specialized Jett 143

    2013 Charge Filter Apex| Specialized Jett 143
    1996(?) Giant Iguana 630|Specialized Riva


    Saving for the next one...

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •