Originally Posted by
AndrewP
You will need a crank puller for square tapered type crank. If it has a cartridge bottom bracket you will need a BB extractor to replace it, but the bearings are not accessable for maintenance.
This is correct.
The crank is square taper - it'll either use a 15/14mm recessed nut or a 8mm hex to remove whatever is securing the crank on. You'll then need a square taper type crank puller. Park CCP-22
Trek doesn't even list the type of bottom bracket it has - you'll need to know this in order to select the correct tool for removing this from your frame. You can take a picture once the cranks are off and we can determine the correct tool for you.