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Discussion Starter · #1 ·
OK, lets try to describe what I have:

A single speed crank and has a hex bolt head on each side.

The BB is internal (I think it's called cartridge?). Not sure if it's square tapered or whatever spline drive.

Do the bolts just thread into the BB, so if I keep the bolts tightened on both sides I shouldn't have a problem?


And to remove the crankset just remove the bolts one each side?
 

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You need some tools.

Yes, bolts should be tight.

Socket to remove the bolts.

Crank extractor tool.

View attachment 280439

No, need

BB removal tool. Can't help too much without knowing what it might be.
 

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more info.. It's a allen head bolt, not a hex cap bolt.
Are you sure the allen head bolt isn't just for a dust cap?

Some cranks, you unscrew this cap (carefully, too, a lot of times they're just chromed plastic, easy to round off) to get to the actual fixing bolt underneath. You'd then proceed with a crank extractor, as bikerjulio depicted.

Some cranks, the allen bolt is part of a self-extracting design. Hard to say without seeing a pic.

Here's a useful website that might help answer your questions, btw: Park Tool Co. » Park Tool Co.
 

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OK, lets try to describe what I have:

A single speed crank and has a hex bolt head on each side.

The BB is internal (I think it's called cartridge?). Not sure if it's square tapered or whatever spline drive.

Do the bolts just thread into the BB, so if I keep the bolts tightened on both sides I shouldn't have a problem?


And to remove the crankset just remove the bolts one each side?
It should occur to you by now given all the questions you have posed on this forum that the brand and model of components makes a difference. Until you share that secret with us you will only get the kind of vague advice you've already gotten. If you're unable to share the brand and model of the crankset could you maybe post a decent (in focus) picture? It's the little things that count.
 

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^ seriously ^ the batterly is dead in my crystal ball.
In that case, you need one of these!

<img src="https://allamericandoorparts.com/wp-content/uploads/wpstorecart/5051.jpg">
 

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I don't recognize the crank. You can remove the bolts with an 8mm key like I showed you. The bolts might be self-extracting, hard to tell, but you will know right away when you undo the bolt. If not you will need a crank extractor tool also like I showed. There are several different BB types possible. We'd need pics after a crank is removed.
 
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