Why can't I remove this

[wjwren]

Undone the bolt and it won't budge.

[subsea99]

You need one of these

http://www.chainreactioncycles.com/x-tools-crank-e...

[deadtom]

tapered splines on the BB axle.

As stated, you need a special tool to remove them (or a hammer and a complete lack of mechanical sympathy)

[wjwren]

thanks, have ordered tool

[SHutchinson]

Another Ventura being upgraded?