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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 12-04-12, 06:28 PM   #1
JonSC
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SRAM Omnium Crank Arm Stuck

I really didn't want to make a whole thread for this but while I was swapping the Omnium crank arms between my bikes, the drive side crank arm on one of them would not come out. I easily removed both sides on my Kilo, but on the Histogram, the drive side would not even budge. I got the left side off fine, I don't see anything keeping the other side from coming out but it just won't move.

Am I doing something wrong? Do I need to do something with the bottom bracket to get it out? I used all my force and spent almost an hour just trying to pull it but no progress at all.
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Old 12-04-12, 06:34 PM   #2
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While I take great pleasure in being a dick, generally, I'd just like to politely point out that we want to keep this thread:

http://www.bikeforums.net/showthread...-quick-answers

at the top of the 42 as much as possible. You're probably better off putting this there or even in the ask scrod thread where he (a professional bicycle mechanic) can advise you.

Hope that wasn't as mean as it sounded - good luck.
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Old 12-04-12, 06:41 PM   #3
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Rubber mallet / wood block.

Also, pro tip: just get another crankset for your kilo. Save yourself the headache.
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Old 12-04-12, 06:48 PM   #4
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Santaria, while I appreciate what you are trying to do (seriously I do) , I am well aware of the other threads. I decided that it would not be the best place to post because this isn't just a quick and straightforward answer. I wanted to know if my technique was wrong, why it may be happening (so it doesn't happen again) and any possible solutions. Plus this is specific to a specific crank set or at least an external bearing one. I know Scrod will see this thread and I'm not doubting his mechanic skills at all, I'm just looking for any knowledge that anyone has.

Naterod, what crank set are you suggesting?
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Old 12-04-12, 06:54 PM   #5
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It's actually a very straightforward answer.

This is a pretty common "problem", usually caused by overtightening the NDS crank bolt. You're not going to be able to pull it out. As Nate said, tap the spindle with a rubber mallet or a wood block and hammer.
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Old 12-04-12, 07:15 PM   #6
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Quote:
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Naterod, what crank set are you suggesting?
The omnium is a great crank. Not saying to get something else. Just saying get a second crankset so you don't have to constantly be swapping back and forth between bikes. That can, as you already saw, get really annoying.
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Old 12-04-12, 07:18 PM   #7
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Quote:
Originally Posted by NateRod View Post
get a second crankset so you don't have to constantly be swapping back and forth between bikes.
+1
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Old 12-04-12, 07:39 PM   #8
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The omnium is a great crank. Not saying to get something else. Just saying get a second crankset so you don't have to constantly be swapping back and forth between bikes. That can, as you already saw, get really annoying.
This is actually a thing? I can barely tolerate doing that with any part even once in a while, even pedals or tires, let alone the whole damn crankset/bb on a consistent basis.
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Old 12-04-12, 08:26 PM   #9
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Oh I don't think I worded my original statement properly. I have two sets of Omniums, I was just swapping the arms because I prefer the 170s I have more.
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Old 12-05-12, 08:52 AM   #10
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Oh. I was like "WTF who does that?"

At any rate, you should still trade one of your omniums for one that's the right length so you don't have to bother with any more swapping.
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Old 12-05-12, 09:56 AM   #11
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Haha! That is a good idea, I don't mind the different lengths that much, I just prefer a certain size on each frame for their different purposes.

And for anyone else with the same issue, if you don't have a hammer or mallet, I got it out by grabbing the frame and stepping on the exposed other end of drive side crank arm just enough to pop it out.
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Old 12-05-12, 09:57 AM   #12
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Who doesn't own a hammer (or something that can be used as a hammer)?
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Old 12-05-12, 10:21 AM   #13
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I own both tools, but I currently live in a dorm and did not bring anything that resembles a hammer.

Last edited by JonSC; 12-05-12 at 10:24 AM.
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Old 12-05-12, 10:26 AM   #14
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Even prehistoric man had the sense to use rocks and a stick.
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Old 12-05-12, 10:33 AM   #15
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I've tried everything, from using the bottom of my shoe, the back of my wrench, and even having someone else pull the frame while I pulled the crank. Nothing would budge it until I finally decided to just step on it as it would be my most powerful option and it does not even require tools.

Honestly I have a ton of respect for you; your knowledge and your business that I support. Why do you need to keep posting remarks that insult my intelligence? Indirectly saying that I lack the sense that even a prehistoric man has is completely unacceptable.
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Old 12-05-12, 10:38 AM   #16
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Come on, man. I'm only teasing.

I'm glad you were able to remove your crank arm.
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Old 12-05-12, 10:45 AM   #17
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Old 12-05-12, 10:51 AM   #18
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Old 12-05-12, 10:59 AM   #19
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Basically sums up this thread haha
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