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  1. #1
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    Old bike, need Hayes 22mm or alternative.

    Currently rebuilding a sweet Trek 9.8 Elite and have run into a snag with the rear brake.

    Originally, the bike came with a Hayes rear caliper with a 22mm mount on the left chainstay. I have newer Shaimano hydro brakes mounted on an A2Z adapter, but the adapter bends under hard braking, getting the caliper out of whack and causing the brake to drag.

    Has anyone come up with a dodge for this situation? Or should I quit trying to fight it and find an original caliper?

    Thanks

    Tony

  2. #2
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    V-Brake

  3. #3
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    Thanks for the response.

    I am not against going to V-brake on the rear but want to save that as a last resort. It would mean buying a new wheelset and possibly changing out my shifters (Deore XT that use the brake levers themselves to shift). Seems I have heard of a hydraulic v-brake but not sure if one would be compatible with my stuff. -TR

  4. #4
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    Quote Originally Posted by spctrbytz View Post
    Seems I have heard of a hydraulic v-brake but not sure if one would be compatible with my stuff. -TR
    Magura HS-11, HS-22 & HS-33 are hydraulic rim brakes.
    Apparently none of those hydraulic rim brakes will work with hydraulic disc brake levers.

    22mm Hayes & Hope calipers occasionally turn up on ebay but it might be a while before you see one.

    Maybe a short leg Shimano IS mount caliper like the XTR M965 which can be see here with the A2Z-AD-PMR-Brake-Adaptor set up like this with a 180mm rotor will work.

    Edit.
    After looking at the shape of that XTR caliper again I don't think that it'd work.

  5. #5
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    Magura Marta calipers work with Shimano brake levers.

    http://forums.mtbr.com/brake-time/xtr-levers-marta-calipers-works-111441.html

    Maybe a 'short leg' Marta 160mm front IS caliper like the one in that last link of my previous post will work with that A2Z adapter.

    The angle of the seat stay might be a limiting factor it'll probably work on a large frame with a bigger angle but not on a small frame with a smaller angle like this.

  6. #6
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    Aloha Tony,

    Will this work?



    They sell these at Toronto Cycles...........

    Torontocycles Disc Brake Adapters, Caliper Adapters, b&s adapters

    Good luck with that. Hope it all works out.

  7. #7
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    gmats, thanks for the reply. I currently have an adapter from A2Z that looks very similar mounted and having trouble with the mount itself warping under braking.

    If the Toronto adapter is stronger than the A2Z I would be very interested in trying one out.


    The Magura might work too. The short A2Z adapter is probably much less likely to bend than the larger one. A bigger rotor can be had easily as well.

    When I get home this evening I will post up a photo of the current setup. -TR

  8. #8
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    I thought about suggesting that but I thought flexing might be a problem which was mentioned in the following thread.

    http://forums.mtbr.com/brake-time/trek-9-8-elite-disc-capable-need-help-593013.html

    Is the A2Z-DM-UNI the adapter that you already have and don't like ?




    .
    Last edited by cobba; 09-12-2012 at 12:51 PM.

  9. #9
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    cobba, It's not the DM-UNI - I had not thought about that one since it looked like it sandwiched part of the frame, and I didn't want to mess up the carbon. It looks very much like the mount in gmat's photo above.

  10. #10
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    Apparently this is not an A2Z mount, may actually be the Toronto one.

    Here's a few fresh photos to give an idea of the setup.

    Notice the relief I ended up filing out to clear the seatstay. It would mount without relief but when the plate warped the rear edge of the plate would catch the rotor spokes. The couple millimeters gained by relieving that area was enough to keep the plate out of the rotor spokes, but just barely. -TR
    Attached Thumbnails Attached Thumbnails Old bike, need Hayes 22mm or alternative.-img_1087.jpg  

    Old bike, need Hayes 22mm or alternative.-img_1088.jpg  

    Old bike, need Hayes 22mm or alternative.-img_1089.jpg  


  11. #11
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    Hi Spctrbyts,

    I'm currently rebuilding the same frame as yours.
    And have the same problems with fitting the rear disc brake.

    I'm glad i've found your article.

    Do you have the brandname en size of the adapter that you used?

    Thanks a lot.

    Regards,
    Thom

  12. #12
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    Quote Originally Posted by Lems View Post
    Hi Spctrbyts,

    I'm currently rebuilding the same frame as yours.
    And have the same problems with fitting the rear disc brake.

    I'm glad i've found your article.

    Do you have the brandname en size of the adapter that you used?

    Thanks a lot.

    Regards,
    Thom
    That adapter is no longer made.
    I don't think many of them were made and I only know of one shop that sold it.
    I think it'd be close to 2 years since I've seen that adapter listed for sale.

    Probably not what you'd call a very good design, I've read a few reports of it flexing under braking.

  13. #13
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    Dear Cobba,

    Thanks a lot for your response.
    Are there any alternatives out there, that you know of?

    Thanks !

  14. #14
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    Alternatives will depend on what your frame is, what size it is, what brake you want to put on it and how much money you want to spend.

    Easiest solution would be to use a rim brake if one can be fitted, they still slow down bikes and make them stop.

  15. #15
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    Quote Originally Posted by Lems View Post
    Hi Spctrbyts,

    I'm currently rebuilding the same frame as yours.
    And have the same problems with fitting the rear disc brake.

    I'm glad i've found your article.

    Do you have the brandname en size of the adapter that you used?

    Thanks a lot.

    Regards,
    Thom
    Hi Thom,

    You might not like my answer... with the adapter, the flex under heavy braking was still unacceptable for me. I'm a big guy and usually grab a lot of brake. I ended up fabricating another one that was somewhat better, but was very heavy. In the end, finding an original Hayes caliper from eBay was my solution. I have since sold the bike on, but can probably get a photo of the setup if it will help you in any way.

    I can also rummage through my parts stash, and see if I have any of the pieces left over.

  16. #16
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    Quote Originally Posted by spctrbytz View Post
    Hi Thom,

    You might not like my answer... with the adapter, the flex under heavy braking was still unacceptable for me. I'm a big guy and usually grab a lot of brake. I ended up fabricating another one that was somewhat better, but was very heavy. In the end, finding an original Hayes caliper from eBay was my solution. I have since sold the bike on, but can probably get a photo of the setup if it will help you in any way.

    I can also rummage through my parts stash, and see if I have any of the pieces left over.
    Hi,

    Thanks for your answer.
    I have a picture of the last setup, that would be amazing.
    I have thought about fabricating my own, however i do not know what the best options are.

    I would like to learn from your experience and thereafter fabricate of buy the best possible adapter for my bike.

    Also if you have an old one laying around that is still straight, that would be great as well.

    But the picture would be asome.

    Thanks a lot

    Thom

  17. #17
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    Quote Originally Posted by Lems View Post
    i do not know what the best options are.
    If the angle of the seat stay and chain stay allows it you can use a a2z AD-PMR adapter: http://www.a2zcomponents.com/02produ...dapter_05.html
    * mechanical disc brakes can't be used with that adapter and not all hydraulic disc brakes can be used with that adapter.










    If the a2z AD-PMR adapter doesn't work I think the best option for your 15 year old carbon frame is to use a v-brake.

  18. #18
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    Thanks alot for your anwsers. I currently have a V-break, but these are not suited for the new rims i've bought.

    I also bought the A2Z AD-PMR adapter, but cant seem to get it right. I think that my disc brakes are not suited for this adapter.

    Anyways, thank you very much for your eleborate answers en pictures.
    You've helped a lot!!

    Cheers!!

  19. #19
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    Quote Originally Posted by Lems View Post
    I also bought the A2Z AD-PMR adapter, but cant seem to get it right. I think that my disc brakes are not suited for this adapter.
    Post some photos.

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