How do you remove cranks?

[montage]

An chain rings...and bottom bracket while we are at it?

Picked up two bikes from the skip today, going to try make a nice bike out of them

Cranks are Tapered (squared) I believe.

 

[Twenty Inch]

An chain rings...and bottom bracket while we are at it?

Picked up two bikes from the skip today, going to try make a nice bike out of them

Cranks are Tapered (squared) I believe.

Slippery slope - the money you save on doing your own work will quickly go on tools that you absolutely must have...I hope you are either single, or have an understanding other half.

Anyway, you'll need a crank remover like this

http://www.bikecare.co.uk/product_info.php?acc=Crank Removers&id=256

 

[MajorMantra]

You need a crank puller with the right head on it, probably this:

http://www.parktool.com/products/detail.asp?cat=26&item=CCP-22

There are some good online tutorials on how to do this, like this one:

http://www.utahmountainbiking.com/fix/crank.htm

Be slow and cautious when threading the tool in and make very sure you've removed any washers. Use a good tool (like the Park one) with flats on the part you thread in. This way you can use a spanner to get it out if it gets stuck for any reason. The first time I did this I used a cheap tool without flats and ended up having someone machine some in when it got stuck.

Chainrings just unscrew normally from one another/the spider using an allen key. Bottom brackets aren't that hard but you need to pay attention to the direction of the threads as they are usually reversed on one side. Again, there are lots of online tutorials on this.

Matthew

EDIT: Pipped at the post!

 

[ianrauk]

Here
http://bicycletutor.com/replace-cotterless-cranks/

and here..
http://bicycletutor.com/cartridge-bottom-bracket/