what Sixty Fiver said, you need the crank removing tool. I brought mine from a super market for 5 euros so they can be very cheep.

I just removed a crank for you, here's how


remove pedals, with oil and 15 mm spanner rotating the oppersite direction to the way the wheels go round in forward motion


This is the bolt that holds the cranks on to the BB. remove it,


This end of the crank tool does that job


leaves you with this


screw threaded end of tool into crank,


screw the pokey end in


with big spanner




the more it screws in, the further the crank gets pushed


congratulations