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It's just really firmly stuck. What would an LBS do?
Use other 'specialist' tools. Bench vices and whatnot.
Assuming the tool is the right one:
My 'pro' tip: bolt the tool on, if possible, and, with the wheels on the bike lean it against something where it's not going to fall over. Attach the wrench parallel to the ground, ensuring pushing down will turn in the correct way to loosen the BB. Then stand on the wrench with one foot, and use your weight to dislodge the BB. Steady the bike with one hand on the seat, the other on the front brake.
Double triple check you are turning it the right way.
Howard-
this.
or alternatively put the cups in a vice and use the frame as leverage.
dont forget to doust in wd40.dont yank to much on the vice otherwise you might deform the cups.
triple check if you are turning the right way. i.e. the opposite way you would push/pull the tool toward.
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Cheers for the advice. Avoided a £15 trip to the LBS (although spent a tenner on the tool and broke a ratchet drive thing in the process).
Plenty of wd40, a mallet and the tool did it, eventually. Managed to take a bunch of paint off the BB shell when it went as well. Not sure how.
Rodolfo
TurtleRecall
Nah the tool's for a hollowtech 2 BB, it's a 5700 105 BB. Pretty sure it's the right tool? It's just really firmly stuck. What would an LBS do?