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Thread: Gravely Feel?

  1. #1
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    Gravely Feel?

    So, I noticed this yesterday during an event... local = drivetrain

    Course was slop - so I figured it was just some 5h1t caught up from the ensuing mud bath.

    Gave bike a thorough clean & relube...

    Took bike out today with my two youngest and noticed it again on any incline that required a bit of load.

    Upon closer inspection on turning cranks I can definitely feel the dreaded gravel.

    Question is: can I (lbs), just change out the bearings?

    Or, would it be prudent to get a whole, new bottom bracket?

    T.I.A

    Sent from my kltedv using Tapatalk
    Last edited by targnik; 10-15-2016 at 04:29 PM. Reason: Dam auto correct!! Gravelly not Gravely...
    "Mountain biking: the under-rated and drug-free antidepressant"

  2. #2
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    Depends on what bb type you use for instance I use shimano 73mm/14mm bsa bottom brackets if one wears out I just replace it there only 20ish at the lower end.

  3. #3
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    Quote Originally Posted by Bahamut2119 View Post
    Depends on what bb type you use for instance I use shimano 73mm/14mm bsa bottom brackets if one wears out I just replace it there only 20ish at the lower end.
    Shimano Pressfit 92...

    Bearings? Or, get new unit?

    T.I.A

    Sent from my kltedv using Tapatalk
    "Mountain biking: the under-rated and drug-free antidepressant"

  4. #4
    since 4/10/2009
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    Quote Originally Posted by targnik View Post
    Shimano Pressfit 92...

    Bearings? Or, get new unit?

    T.I.A

    Sent from my kltedv using Tapatalk
    buy a new one. I hate the plastic shimano PF cups. they're not even worth replacing the bearings in. I'd buy something better than shimano, fwiw.

  5. #5
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    I agree those can be more than cheep enough to toss in the trash I just happen to have looked them up for pricing a few hours ago I got a bunch of money coming and tempted to build a new bike.

  6. #6
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    Quote Originally Posted by Harold View Post
    buy a new one. I hate the plastic shimano PF cups. they're not even worth replacing the bearings in. I'd buy something better than shimano, fwiw.
    I think the use of a capital letter for the beginning of a sentence and the brand name Shimano is warranted here

  7. #7
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    Bearings rough? You need a new bike!

    j/k

    First, did you spin the crank without the chain on? That'll help eliminate other causes before tearing things apart. If so, then...

    New bottom brackets are basically designed to be use and throw away, but really they're not that hard to deal with in most cases.

    I'm not sure on all bottom brackets, but I just rebuilt/re-lubed an old GXP for the 2nd time recently. Good as new. The one caveat is the seals are not the most rugged, so this isn't for everybody. Gentle is good.

    First half of this vid as an example, but each is a little different. Once opened up I like to soak in degreaser and spray out a couple times. Make sure they spin smooth at this point. Then let dry completely, pack with waterproof grease and reassemble.

    Takes a little time and effort, but saves $15-20 each time. I actually have a spare so one is ready to go in and I can rebuild later. Getting a new one and experimenting on this one might be the way to go if you're up for it. I'm sure the LBS will give you the old one if you ask.

    *edit: just noticed Harold's comment that the plastic ones are not so good, so might not be worth the trouble but going to leave this for future reference.

  8. #8
    since 4/10/2009
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    Quote Originally Posted by JackWare View Post
    I think the use of a capital letter for the beginning of a sentence and the brand name Shimano is warranted here
    Dafuq?

  9. #9
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    Quote Originally Posted by Harold View Post
    Dafuq?
    well u know, cuz gramer AND Stuff. lol

    Sum people are never hapy

  10. #10
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    Received advice from bike manufacturer...

    Was advised to go Shimano BB94 ^^

    Got one off eBay for not many $$

    LBS says it won't last... but, the BB92 it's replacing has lasted almost 2 years.

    Hoping for more from a later product.

    Sent from my kltedv using Tapatalk
    "Mountain biking: the under-rated and drug-free antidepressant"

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