I need to remove my pedals so the bike can go on a plane soon, but the left pedal seems to have been welded on I have tried a hammer, spanner (which broke), lot's of WD 40, the allen key thing and even pouring boiling water over it followed by icy water...still it's firmly STUCK. I have shimano spd double sided ( I forget the full name..is it M520 or something like that??) The pedal 'arm' (are those called cranks?) are aluminium shimano...pretty sure they are bottom end...they came supplied with the bike...I see logos for Tiagra and Deore but I dont think that has much to do with the bloody pedals being stuck. I tried the standing on the spanner thing but the spanner broke! I even used a heavy duty steel heavy mallet on the spanner! The LBS also couldnt remove the dam thing ...what next...the firebrigade??