erm what crankset is it...You will need a crank puller to take the crank off and a allen key to undo the chain rings and also you will need one off these to hold the chainring bolt when you undo it this stops it spinning round when you undo it with a allen key! Square taper crank puller this is the Tool that holds the chainring nut when undoing it with allen key this stops the nut spinning when turning it with a allen key