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  1. #1
    One skid from blown knees bigbris1's Avatar
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    Uh Oh. I think I broke Something!

    I was hauling down Broadway & when I hit Times Square, I hit the brakes (locked up my legs) & felt/heard this weird noise. It was a sort of ratchety sound. Like when the cog comes loose (I doubt it did). I pulled over & checked the crank arms which seemed to have play. So I walked 2 blocks to Metro & had them check the bike.

    They brought it back & said 3 of my chainring bolts were loose, as well as both crank arm bolts. They tightened them up, no charge.

    OK, got back on the horse & continued down to Union Square to pick up a bar/stem set from another member. On the ride back home (151st Street) I started hearing a creaking noise (last time it creaked like this was a loose pedal) & more play in the left crank arm (this arm had come loose like 4 times before, to the point I had to start riding with an Allen wrench).

    Got home, tightened the pedals, crank arm bolts & there is still play. Feels wobbly & creaks when I pedal. Needless to say I think the left arm is shot. Funny thing is, when I move the drive side arm I can see the chainring move a bit, along with the whole bottom bracket (frame part). What's up with that?

    Is it possible the BB is messed up? Will I just need a left arm, or a whole assembly? This sucks, I can't ride 'till this is fixed.

    Thanks for reading this.
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  2. #2
    n00b Mofopotomus's Avatar
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    I just hope it's just your bottom bracket and not your frame. Get that thing into a shop and let them check it out. It might have been something they didn't catch before. In the mean time you should dis-assemble and re-assemble your bottom bracket area and check for anything weird (i.e. bunged up threads, stuff that shouldn't be there).

    Don't forget to lube.

  3. #3
    Asymmetriad
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    Jobst Brandt says...

    Jobst Brandt says your cranks are ruined.

    See here:

  4. #4
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    once the crank-arms come loose, if you keep riding like that, the aluminum of the square taper will mall up. this makes it impossible for the arm to get properly re-seated. this warrants a new arm. normally, if its the left side, you can replace it with a generic part for not too much money. if it happens to the drive side, you are looking at a new set of crank arms.

  5. #5
    One skid from blown knees bigbris1's Avatar
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    Thanks for the responses.

    After checking it again just now, I have determined that the left arm needs to be replaced. The movement I was seeing on the drive side was the frame flex due to the pressure I was applying (hoping, at least).

    Before I pull the trigger on a generic replacement arm, I'm going to see if anyone has the actual part. Mike at BD told me to send it to him & he would either repair or replace it, but who knows how long that will take.

    Thanks again!
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  6. #6
    Writin' stuff ZeCanon's Avatar
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    depending on the type the axle in a BB can come loose which has he same effect. Bring it to a shop before you go buy new cranks for no reason. If it's just the BB, it is an easy fix.
    Velo Magazine/VeloNews.com tech guy get in touch or hit me on the tweeter @CaleyFretz

  7. #7
    o harro buttercup
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    Quote Originally Posted by droptop View Post
    once the crank-arms come loose, if you keep riding like that, the aluminum of the square taper will mall up. this makes it impossible for the arm to get properly re-seated. this warrants a new arm. normally, if its the left side, you can replace it with a generic part for not too much money. if it happens to the drive side, you are looking at a new set of crank arms.
    yep..

  8. #8
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    good thing is the cranks not the bottom bracket/frame.

  9. #9
    Senior Member JayNev's Avatar
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    this happened to me, and when i took it into the shop the square taper of my left crank arm was definitely a little malled up. luckily, i caught it quick (i guess?) and didn't keep riding on it. the shop was able to tighten the cranks and I have still been riding on them. advice from LBS was that they won't last that long, and i'll need to replace sometime down the road. Oh well though, they are bulletproofs. i feel ike this happened to me because they weren't installed tight enough or correctly for that matter.
    i'll coast when i'm dead

  10. #10
    One skid from blown knees bigbris1's Avatar
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    Quote Originally Posted by ZeCanon View Post
    depending on the type the axle in a BB can come loose which has he same effect. Bring it to a shop before you go buy new cranks for no reason. If it's just the BB, it is an easy fix.
    Could this be true in the case of a sealed BB? I'm pretty sure it's the left arm, especially since it kept coming loose ever since I got the bike.
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  11. #11
    Asymmetriad
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    If you read the article I linked to you'd have seen the part that explains why tightening a crank that comes loose pretty much ruins it right away. Whether anything else is wrong or not, if you've been tightening either of your cranks as much as you say without taking them off first you will have ruined the tapered holes and they'll never stay tight on the spindle.

  12. #12
    One skid from blown knees bigbris1's Avatar
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    I think it was more of a continuing to ride while it was loose until I realized it was loose issue rather than a not taking it off & reinstalling once it came loose issue.

    Really though, I think it wasn't torqued to spec when the bike arrived. I only realized just how much crank bolts need to be torqued down upon intial installation until after the fact.
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  13. #13
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    Quote Originally Posted by JayNev View Post
    this happened to me, and when i took it into the shop the square taper of my left crank arm was definitely a little malled up. luckily, i caught it quick (i guess?) and didn't keep riding on it. the shop was able to tighten the cranks and I have still been riding on them. advice from LBS was that they won't last that long, and i'll need to replace sometime down the road. Oh well though, they are bulletproofs. i feel ike this happened to me because they weren't installed tight enough or correctly for that matter.
    Same thing happend to mine on my roadbike. Two separate LBS failed to fix the problem. One suggested I needed a new crank arm and bottom bracket. This was several years back when I knew nothing about bike repair. I bought an huge allen wrench with lots of torque and some locktite. I cranked down with everything I had as I figured I had nothing to lose anyways. I've ridden it about 1,000 miles since then and it is a tight as ever.

  14. #14
    One skid from blown knees bigbris1's Avatar
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    Yeah, but the resisting & trackstanding & my weight probably warrants a new arm.

    Can the spline be damaged this way, or just the arm? Also, does anyone know the bcd of the FSA Vero crank? 110?
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  15. #15
    One skid from blown knees bigbris1's Avatar
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    I came home & was shopping online for a new crankset. Something told me to just make sure so I go over to the bike & wiggled both arms. They both seemed to move so I decided to take the chain off (DUH!) I realized quickly that the drive arm was even more loose than the left arm! I took the bike up the block to the LBS so he could take the cranks off.

    He took them off & I inspected them. I had used thick bearing grease when I installed them after the powdercoating & saw all kinds of grime in there. I asked him to clean everything & reinstall the cranks.

    He protested a bit but did it. When he took the bike down I asked for his 8mm to tighten the bolts even more (by foot). I broke the drive side bolt off into the BB spline!!

    By this time the shop is supposed to be closed (8PM) I asked if he could take the broken bolt out. He tried, eventually drilled a hole in it & we were able to get it out by hammering a long star wrench in & turning it out. By this time it's 9PM & his wife is looking antsy. "How much do I owe you?" I asked. "Five dollars" he replied with a shrug. Needless to say I gave him a nice tip for getting me riding again. Best of all, it seems the cranks are working well now. My drivetrain is quieter because my chain is looser than before & the bike is less resistant.

    I'm sure the left arm will come loose again, but hopefully it will hold on until Mike at BD sends me the replacement.

    So here's to my LBS guy for saving my day & my bike!
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  16. #16
    Asymmetriad
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    It's a spindle, not a spline. Splines are raised longitudinal ribs like on an ISIS spindle or a freehub body.

  17. #17
    jawesome imoscardotcom's Avatar
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    i don't think i like the OP, esp. after that lame conversion/brake thread.

  18. #18
    Senior Member the_don's Avatar
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    Quote Originally Posted by bigbris1 View Post

    When he took the bike down I asked for his 8mm to tighten the bolts even more (by foot). I broke the drive side bolt off into the BB spline!!

    By this time the shop is supposed to be closed (8PM) I asked if he could take the broken bolt out. He tried, eventually drilled a hole in it & we were able to get it out by hammering a long star wrench in & turning it out. By this time it's 9PM & his wife is looking antsy. "How much do I owe you?" I asked. "Five dollars" he replied with a shrug. Needless to say I gave him a nice tip for getting me riding again. Best of all, it seems the cranks are working well now. My drivetrain is quieter because my chain is looser than before & the bike is less resistant.

    I'm sure the left arm will come loose again, but hopefully it will hold on until Mike at BD sends me the replacement.

    So here's to my LBS guy for saving my day & my bike!
    Wow, this is an amazing combination. Super nice bike shop owner and stupid arrogant customer.

    Sorry, don't want to be offensive but you really should trust the expert, and using your foot to tighten the bolts!!! ****ing Stupid!

    He should have politely told you to **** off and keep the bike for a few days to fix something you broke and that he had just finished working on whilst charging your stupid ass for all the extra work you are requesting of him.

  19. #19
    One skid from blown knees bigbris1's Avatar
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    This is a humble bike shop owner, and just because he has the tools, doesn't necessarily mean he has the knowledge. He had no idea how many in/lbs to tighten the cranks, and when I took the bike down it took at least 5 complete turns of the bolt to get it tightened down properly.

    When he first took my cranks off he told me I needed a new BB & tried to sell me one stating that the one I had on the bike was not the right size, that I needed longer spindles. He knows nothing of chainline. Also tried to sell me a cheap crankset.

    Yeah, I went too far tightening the bolt, but that doesn't make me arrogant, just not a sheep like most of you are.
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  20. #20
    Senior Member the_don's Avatar
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    Sorry, i retract my arrogant statement. But as we only have your word on the matter it's pointless to go any further into it.

  21. #21
    Senior Member jet sanchEz's Avatar
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    Quote Originally Posted by imoscardotcom View Post
    i don't think i like the OP, esp. after that lame conversion/brake thread.
    He is the dude that had that awful thread with the "that is a guy I can roll with" quote, right? I spend too much time on these forums......

  22. #22
    Senior Member vettefrc2000's Avatar
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    Quote Originally Posted by bigbris1 View Post
    I think it was more of a continuing to ride while it was loose until I realized it was loose issue rather than a not taking it off & reinstalling once it came loose issue.

    Really though, I think it wasn't torqued to spec when the bike arrived. I only realized just how much crank bolts need to be torqued down upon intial installation until after the fact.
    I had the same thing happen and I bought some brass shim stock. I used the thinest in the pack and torqued the arm until it was in the proper position.

  23. #23
    One skid from blown knees bigbris1's Avatar
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    How's that holding up?
    Quote Originally Posted by 91MF View Post
    bigbris stopped two runaway busses riding brakeless one time.

    the moral of the story: riding brakeless saves lives.

    i am serious.

  24. #24
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    Quote Originally Posted by bigbris1 View Post
    This is a humble bike shop owner, and just because he has the tools, doesn't necessarily mean he has the knowledge. He had no idea how many in/lbs to tighten the cranks, and when I took the bike down it took at least 5 complete turns of the bolt to get it tightened down properly.

    When he first took my cranks off he told me I needed a new BB & tried to sell me one stating that the one I had on the bike was not the right size, that I needed longer spindles. He knows nothing of chainline. Also tried to sell me a cheap crankset.

    Yeah, I went too far tightening the bolt, but that doesn't make me arrogant, just not a sheep like most of you are.
    With your attitude, you're lucky anybody wants to try to help you out.

  25. #25
    jawesome imoscardotcom's Avatar
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    Quote Originally Posted by jet sanchEz View Post
    He is the dude that had that awful thread with the "that is a guy I can roll with" quote, right? I spend too much time on these forums......
    mhmm, thats the one.

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