crankset advice.

hopper26
hopper26 Posts: 73
edited July 2008 in MTB workshop & tech
hi
i need to get a new cranset as my one has now worn out. I have got shimano hollotech and will be replacing it with a shimano deore crankset. Are these 1 or 2 pice cranks. Will i need to get a new bottom bracket and what tools do i need. I have been reading a few help pages on how to do this but every time they take off a bolt and on mine i can see right throught the middle of the bb because there is a hole going right through


Any help would be great.
thaks
Born 2 ride!

Comments

  • nicklouse
    nicklouse Posts: 50,673
    Yes so what crankset do you actually have?

    pictures please, or make and model and year of the bike.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • hopper26
    hopper26 Posts: 73
    My bike is the specialized rockhoper comp 08. The crankset is Shimano FC-M521, Hollowtech, replacable rings with alloy outer, Octalink spline.

    bb is Shimano BB-ES25, Octalink spline, cartridge bearing, 68 x 118mm for 50mm chainline



    hope this helps
    thanks
    Born 2 ride!
  • nicklouse
    nicklouse Posts: 50,673
    in that case any Octalink compatible crank set will fit. S you have a bb and 2 crank arms.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • hopper26
    hopper26 Posts: 73
    is it easy to take off and put back on again if so which tools do i need.
    Born 2 ride!
  • nicklouse
    nicklouse Posts: 50,673
    a suitable crank puller.

    have a read of the info on parktools.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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