several things

1) It depends on the crankset. The most common is 8mm.

2) Take it to a reputable LBS and have them do it, unless you have a
headset removal tool.

JD

As the crankset goes, removing that bolt won't necessarily do it alone.
Again, depends on the crank You may need a crank extractor too.

Swapping frames?

/s

(Hmmm... a straight answer from JD.... I can't help but wait for the
other shoe to drop.)

have the extractor already, yeah, its coming off one bike, and going onto
another
many thanks
<[email hidden]> wrote in message
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Quoted message said:

As the crankset goes, removing that bolt won't necessarily do it alone.
Again, depends on the crank You may need a crank extractor too.

Swapping frames?

/s

(Hmmm... a straight answer from JD.... I can't help but wait for the
other shoe to drop.)

#2 see "ghetto headset removal" thread from a few days ago...

strawberry said:

1 ) what size allen key is needed to remove cranks ?

2) how the hell do you remove the bottom of a headset from a frame?

tia.
i'm sure lots more stupid questions will follow

Quoted message said:

(Hmmm... a straight answer from JD.... I can't help but wait for the
other shoe to drop.)

The name "strawberry" reminds me of Cheech's cousin "Strawberry" from
Up In Smoke, so I had to laugh and post straight.

JD "I wasn't lookin' at his neck, man"

"strawberry" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

1 ) what size allen key is needed to remove cranks ?

God knows, the big one that fits nothing else.

Quoted message said:

2) how the hell do you remove the bottom of a headset from a frame?

You 'need' a tool that looks like a 1 1/8th pipe with a split down the
middle, it hooks the cup and you bash it out with a hammer. However, the
alternative way is to use a hammer and punch. You'll probably wreck the cups
but if you're taking the cups out, you're most likely putting a new headset
in anyway.