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  1. #1
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    22mm chain stay disc brake adapter

    I looked around on-line for an adapter to get disc brakes on the rear of my 99 Klein Attitude Comp and I couldn't find anything that worked so I had a local laser and fabrication shop make me one (I am friends with the owner). I found out that there is a demand for these on the market so we made a few. The adapter gets the calliper above the rear seat stay which is the issue with the other adapters on the market. It works with Trek, Klein and Schwinn models that all have that same 22mm chain stay mount pattern and is designed for 160mm rotors. Unfourtunately my picture file sizes are too large for this format. If you would like pictures or information regarding this you may contact me at nanoseth@yahoo.com!

  2. #2
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    You mean something like this?

  3. #3
    rebmem rbtm
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  4. #4
    nnn
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    Neither of those 2 are what is being posted here.
    The first one is for Hayes mounts on the seatstay, some frames have them on the chainstay.
    The A2Z is universal but I found it couldn't work on my frame with a Hope ProII QR hub.
    "Life begins at 140" Richard Burns
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  5. #5
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    Quote Originally Posted by nnn
    The A2Z is universal but I found it couldn't work on my frame with a Hope ProII QR hub.
    The A2Z adaptor should work if you use a front caliper on the rear.

  6. #6
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    Nope. I am talking about using satndard callipers on a rear chain stay 22mm mount pattern for a 160mm disc brake rotor. The A2Z AD PMR doesn't work with most bikes and callipers because of conflict with the seat stay. This adapter gets the calliper up above the seat stay where all the bikes today have their callipers mounted. It works with Hayes, Shimanno and Avid that I know of and probably all the other ones with IS mounting pattern too.

  7. #7
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    Quote Originally Posted by nanoseth
    Nope. I am talking about using satndard callipers on a rear chain stay 22mm mount pattern for a 160mm disc brake rotor. The A2Z AD PMR doesn't work with most bikes and callipers because of conflict with the seat stay. This adapter gets the calliper up above the seat stay where all the bikes today have their callipers mounted. It works with Hayes, Shimanno and Avid that I know of and probably all the other ones with IS mounting pattern too.
    But my point is you can make that A2Z adaptor work if you simply use a front caliper with it. I did that on an old Schwinn and was able to keep using a 160mm rotor. A2Z states you must use a 180mm rotor with the adaptor. When you use a front caliper it does not get pushed out as much, thus eliminating the conflict with the seatstay.

    If you are trying to sell the adaptors you made on the forum I suggest you buy an ad to keep the moderators happy.

  8. #8
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    No, he mentioned he had IS calipers so he would need a front caliper in back to run 160mm rotors.

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    rebmem rbtm
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  10. #10
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    22mm chain stay adapter

    I will look into putting an advertisement up. Thanks.

  11. #11
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    Hey I am needing this adapter I have a 99 8500 Trek WSD
    I am wanting to install Avid BB7 mechanical disk brakes. Where do I buy one

  12. #12
    rebmem rbtm
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    Quote Originally Posted by Judacator View Post
    Hey I am needing this adapter I have a 99 8500 Trek WSD
    I am wanting to install Avid BB7 mechanical disk brakes. Where do I buy one
    I don't think that you can buy that adapter anymore, I don't think that it was a great design and I suspect that there would be some flex with that adapter too.


    I'd stay with a rim brake on the rear and put a disc brake on the fork.

  13. #13
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    Thanks I guess my next step is to cut the seat stay and weld an IS standard disk brake into it

  14. #14
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    Quote Originally Posted by Judacator View Post
    I guess my next step is to cut the seat stay and weld an IS standard disk brake into it
    I wouldn't.

    If you were to weld on a brake mount you wouldn't need to cut the seat stay.

    If you do weld on a brake mount are you also going to re-heat treat the aluminum frame afterwards?

  15. #15
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    I see this old thread has been revived a few weeks ago. I have a 99 Mantra and want rear discs too. Anyone have a viable fix? I have threaded holes 22mm apart on the non-driveside chainstay. Hope there are suggestions. I haven't been able to find a brake with holes 22mm apart...

  16. #16
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    Re: 22mm chain stay disc brake adapter

    Quote Originally Posted by lucky53s View Post
    I see this old thread has been revived a few weeks ago. I have a 99 Mantra and want rear discs too. Anyone have a viable fix? I have threaded holes 22mm apart on the non-driveside chainstay. Hope there are suggestions. I haven't been able to find a brake with holes 22mm apart...
    Nothing has changed except demand is lower than ever.
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  17. #17
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    22mm chain stay disc brake adapter

    That isn't reassuring...

  18. #18
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    Re: 22mm chain stay disc brake adapter

    Quote Originally Posted by lucky53s View Post
    That isn't reassuring...
    Not meant to be. That brake mount has not been used for 15 years.
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  19. #19
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    22mm chain stay disc brake adapter

    Neither has a carburetor but I can still buy parts.

  20. #20
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    Re: 22mm chain stay disc brake adapter

    Quote Originally Posted by lucky53s View Post
    Neither has a carburetor but I can still buy parts.
    Very poor comparison.
    There have been many hundreds of millions of carburetors made in the past 100+ years, many of which no longer have parts available.
    There may have been a thousand or two 22mm calipers made over 2-3 years. Spare parts ended then, too.

    Just keep your rim brake.
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  21. #21
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    Toronto cycles has some, though there is no guarantee it will fit, so measure carefully to see if you have the required room.
    a2z Disc Brake Adapter, A2z DM-UNI, AD-PMR, A2z Components

  22. #22
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    22mm chain stay disc brake adapter

    I know you're much more of an expert than me but just because a solution hasn't been found doesn't mean giving up is the answer. Maybe you're right and I won't solve this issue, but if I keep my eyes open eventually someone will list a 22mm brake in eBay or another solution will present itself.

    Just because it's hard and unimportant to you doesn't mean it's unimportant to everyone.

  23. #23
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    Re: 22mm chain stay disc brake adapter

    Quote Originally Posted by lucky53s View Post
    I know you're much more of an expert than me but just because a solution hasn't been found doesn't mean giving up is the answer. Maybe you're right and I won't solve this issue, but if I keep my eyes open eventually someone will list a 22mm brake in eBay or another solution will present itself.

    Just because it's hard and unimportant to you doesn't mean it's unimportant to everyone.
    You need to be realistic.
    mtbtires.com
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  24. #24
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    22mm chain stay disc brake adapter

    A true optimist.

  25. #25
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    That makes two of us.... I'm trying to upgrade my 2000 Klein Mantra to disc brakes and have followed the same trail leading to nowhere at present. I bought the adaptor from A2Z DM-UNI but it doesn't fit! I'm not giving up though. The AD-PMR looks more likely but want to hear from A2Z before I waste more money. If I find a solution, I'll let you know.

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