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Old 03-27-2009, 04:04 PM   #1
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Question Mountain Bike question

How do you tighten the cranks on a MB? They wobble and squeak when I pedal
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Old 03-27-2009, 04:50 PM   #2
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take off the pedals at the bottom bracket. Then, depending on what bike you have, there may be any of a few different styles of fastening for the internals of the bottom bracket. tighten depending on what you find in there.
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Old 03-27-2009, 05:57 PM   #3
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evrytime i had that prob, older GT, it was a blown bottom bracket.
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Old 03-27-2009, 07:01 PM   #4
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Well its a Brand New bike only had it for a week or so
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Old 03-27-2009, 07:04 PM   #5
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what type of cranks do you have?
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Old 03-27-2009, 07:17 PM   #6
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My temporary bike I got is a Mongoose Detour MB. Its stock.


I might keep it and just mod it.... or wait until I get a job and get a REAL bike
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Old 03-27-2009, 07:18 PM   #7
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Old 03-27-2009, 07:27 PM   #8
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once you can drive, you're not going to want to do anything to a bike.....promise.
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Old 03-27-2009, 07:33 PM   #9
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Your probably right about that. I still need to fix this crank issue

Mod Bug is in season for me.
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Old 03-27-2009, 07:34 PM   #10
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Quote:
Originally Posted by Lentsnh View Post
Your probably right about that. I still need to fix this crank issue

Mod Bug is in season for me.

Oh yeah. Something about the warm weather is making me build endless shit. Just did somethings to my dads truck for him even though he didn't ask me too. I gotta be working on something at all times.
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Old 03-27-2009, 07:39 PM   #11
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X2 on working on something all the time. When I get bored I find something, take it apart and put it back together over and over again.

What did you do? I was about to do the Fog Mod today but missed my chance
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Old 03-27-2009, 07:46 PM   #12
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don't ride the bike with loose cranks. You can easily damage the cranks and the bottom bracket.

This was one of those things I was hoping wouldn't come up until the tune up. You can bring it in to a shop and hope they're nice, or you can use an 8mm Allen wrench. You'll need a long one. Tighten the snot out of it, but do not let it slip/strip.

As a previous poster mentioned, there is no need to remove the cranks. Just tighten them up.
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Old 03-27-2009, 07:48 PM   #13
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Quote:
Originally Posted by Lentsnh View Post
Your probably right about that. I still need to fix this crank issue

Mod Bug is in season for me.
did you remove the pedal arms yet and see what your working with?
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Old 03-27-2009, 07:57 PM   #14
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Quote:
Originally Posted by lsocoee View Post
don't ride the bike with loose cranks. You can easily damage the cranks and the bottom bracket.

This was one of those things I was hoping wouldn't come up until the tune up. You can bring it in to a shop and hope they're nice, or you can use an 8mm Allen wrench. You'll need a long one. Tighten the snot out of it, but do not let it slip/strip.

As a previous poster mentioned, there is no need to remove the cranks. Just tighten them up.
Thats exactly what I did. Tightened the snot out of them but yet they still wobble and squeak (more like a muffled squeak)
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Old 03-27-2009, 07:59 PM   #15
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Quote:
Originally Posted by zigzagg321 View Post
did you remove the pedal arms yet and see what your working with?
Crank arms? no I havent. Its a BRAND NEW bike.
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Old 03-27-2009, 08:02 PM   #16
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Quote:
Originally Posted by Lentsnh View Post
Thats exactly what I did. Tightened the snot out of them but yet they still wobble and squeak (more like a muffled squeak)
a squeak is OK. Some just do that. You can also take off your pedals, grease the threads and reinstall the pedals.

http://www.expertvillage.com/video/4...ls-bicycle.htm

Sometimes removing the cranks, greasing the bottom bracket spindle, and correctly torquing the cranks back on will help. There is also the possibility that you rode too long with them loose and they began to wear out on the mating surfaces.
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Old 03-27-2009, 08:03 PM   #17
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Quote:
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Crank arms? no I havent. Its a BRAND NEW bike.
that wasn't put together appropriately Buy your nice bike from a bicycle shop and use their free tune ups.
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Old 03-27-2009, 08:13 PM   #18
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Quote:
Originally Posted by lsocoee View Post
a squeak is OK. Some just do that. You can also take off your pedals, grease the threads and reinstall the pedals.

http://www.expertvillage.com/video/4...ls-bicycle.htm

Sometimes removing the cranks, greasing the bottom bracket spindle, and correctly torquing the cranks back on will help. There is also the possibility that you rode too long with them loose and they began to wear out on the mating surfaces.
Ok ill try that tomorrow. But when I started to tighten them today. they were very tight maybe 1/8th of a turn is all it could give
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Old 03-27-2009, 08:14 PM   #19
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Quote:
Originally Posted by lsocoee View Post
that wasn't put together appropriately Buy your nice bike from a bicycle shop and use their free tune ups.
I am. Once I get the money
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