Hope c2 adaptor for rockshox j2

at106
at106 Posts: 71
edited April 2009 in MTB workshop & tech
Ive bought a set of hope c2 closed hydraulic brakes. Im using 160mm discs and rockshox j2 forks i need an adaptor to fit these. Alink would be helpful.

Thanks

Comments

  • supersonic
    supersonic Posts: 82,708
    What mounts are on your J2 fork? Is the C2 a IS caliper?
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  • at106
    at106 Posts: 71
    It is an IS caliper the mount on the fork is like this

    th_747e_1_sbl.jpg
  • supersonic
    supersonic Posts: 82,708
    Should just bolt straight on then.
    GT ZASKAR CARBON TEAM

    VOODOO CANZO

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  • nicklouse
    nicklouse Posts: 50,673
    more info would be good.

    caliper number ETC have a look in the Brake mounts sticky for some help.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    the distance between the caliper holes is 69mm the distance between the fork holes is 51mm ill have to go and find the caliper number.
  • at106
    at106 Posts: 71
    The caliper number is 9 and im using 160mm rotors
  • nicklouse
    nicklouse Posts: 50,673
    very early Post mount caliper.

    you need a 20mm bigger disc and a AD-PMF69 A2Z adaptor

    http://www.a2zcomponents.com/ada.htm
    Function/Features:
    - Adapter for old Manitou fork post mount (69mm: center to center) to
    convert to ?IS?International Standard disc mount.
    - Enlarge your rotor 20mm diameter for increased braking power!
    - Fits most of disc brake systems.
    AD-PMF69.jpg
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    So why wont it work with a 160mm rotor?
  • nicklouse
    nicklouse Posts: 50,673
    cause it will not. there is just not the room.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    it says that the 69mm is the side that connects to the forks i think , but i need the 69mm bit for the caliper
  • nicklouse
    nicklouse Posts: 50,673
    no the caliper is 69mm and the fork is 51mm

    but to be sure lets have a photo of the caliper.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    This isnt mine but its exactly the same only ive got the whole caliper

    http://cgi.ebay.co.uk/Hope-C2-Caliper-H ... 8002r38141
  • nicklouse
    nicklouse Posts: 50,673
    As it says there
    One used C2 caliper half No 9 fitting to suit early Manitou post mounts
    fo the spacing is as i thought and you need the adaptor listed and a 180mm disc.

    Please not that an IS (fork) to Post (caliper) adaptor will not work and the new Post mounts are 74mm not the 69mm that you have on the caliper.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    Thanks for all your help so i need to order the adaptor you said and a 180mm rotor.
  • nicklouse
    nicklouse Posts: 50,673
    Yes, If the caliper is really a 9 with 69mm spacing (not74mm)
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • whyamihere
    whyamihere Posts: 7,719
    Hang about... C2s all used xx5mm rotors, not xx0... The adaptor adds 20mm, so that would make a 185mm necessary rather than 180 wouldn't it?
  • nicklouse
    nicklouse Posts: 50,673
    IF his disc is 160 then.....

    but yes if 165 then 185.

    But the old No 9 caliper? (not the 9:74)
    Caliper #9: This caliper is to be used with Manitou forks w/ 68mm hole spacing with 165mm rotors (??). No adapter is required (bolts directly to the fork tabs).
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • at106
    at106 Posts: 71
    well i just thought id say the adaptor arrived yesterday all the holes were the right distance apart but unfortunately the shape of it didnt fit the caliper very well. So in the end i just used an old 74mm adaptor and redrilled the holes.

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