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  1. #1
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    What adapter to go from 160mm to 180mm?

    I have a Specialized Carve Pro 2013 which has Avid Elixir 5 fitted in the rear with a 160mm HS1 rotor.

    I would like to to change to a 180mm HS1 rotor.

    Which adapter should I use?

  2. #2
    rebmem rbtm
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    If there's no adapter on it now, you'd need the following adapter.

    http://www.artscyclery.com/Avid_Post...-AVAPA180.html

  3. #3
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    What adapter to go from 160mm to 180mm?

    Thanks cobba

  4. #4
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    Sorry cobba but is this with CPS or not? I am in the UK so I tried to find the same online from a UK vendor but the ones I have found make a point of being CPS or Non-CPS and I have no idea what I need....

  5. #5
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    You need the shimano post to post 180mm adapter. There isn't a specific front or rear (they are all listed as front, but they work on both front and rear). Took me awhile to figure that out, kept looking for a rear specific.

    I'm not too smart sometimes.

    edit: Once again, not too smart, thought you were going to shimano (like everyone else does eventually).
    Last edited by Rock; 09-26-2013 at 07:30 AM. Reason: stupid
    How can anyone who's been riding as long as I have, be so slow???

  6. #6
    rebmem rbtm
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    Avid 20mm Post Adapter: http://www.evanscycles.com/products/...aptor-ec032296

    They list that adapter as 160mm rear / 180mm front but it's only a 160mm rear if you have 140mm post mounts on the rear, if your frame has 160mm post mounts then that adapter will allow you to use 180mm rotor on the rear.

    160mm post mounts means that when the brake is mounted on the post mounts without an adapter it is spaced correctly for a 160mm rotor.
    140mm post mounts means that when the brake is mounted on the post mounts without an adapter it is spaced correctly for a 140mm rotor.

    The '20mm POST' that's stamped on the adapter just means that it'll pack the caliper out 20mm on 140mm post mounts to use a 160mm rotor and it'll pack the caliper out 20mm on 160mm post mounts to use a 180mm rotor.

    Here's a photo of 160mm post mounts, 180mm adapter (20mm Post) and 180mm rotor.





    If you have 140mm post mounts you'd need the following '40mm Post' adapter for a 180mm rotor, putting this adapter on 160mm post mounts will allow you to use a 200mm rotor.

    Avid 40mm Post Adapter: http://www.biketart.com/349784/produ...ing-bolts.aspx

  7. #7
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    Brilliant, cheers mate! Now ordered

  8. #8
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    Quote Originally Posted by cobba View Post
    Avid 20mm Post Adapter: Avid CPS 160mm Rear/ 180mm Front Post Mount Adaptor | Evans Cycles

    They list that adapter as 160mm rear / 180mm front but it's only a 160mm rear if you have 140mm post mounts on the rear, if your frame has 160mm post mounts then that adapter will allow you to use 180mm rotor on the rear.

    160mm post mounts means that when the brake is mounted on the post mounts without an adapter it is spaced correctly for a 160mm rotor.
    140mm post mounts means that when the brake is mounted on the post mounts without an adapter it is spaced correctly for a 140mm rotor.

    The '20mm POST' that's stamped on the adapter just means that it'll pack the caliper out 20mm on 140mm post mounts to use a 160mm rotor and it'll pack the caliper out 20mm on 160mm post mounts to use a 180mm rotor.

    Here's a photo of 160mm post mounts, 180mm adapter (20mm Post) and 180mm rotor.





    If you have 140mm post mounts you'd need the following '40mm Post' adapter for a 180mm rotor, putting this adapter on 160mm post mounts will allow you to use a 200mm rotor.

    Avid 40mm Post Adapter: Avid Post Mount Plus 40mm Brake Mount - (Front 200/Rear 180), Inc. Stainless Bracket Mounting Bolts | Brake Adapters | Avid | Biketart | - www.biketart.com
    The 20mm Avid CPS PM adapters seem to be NLA??? I've searched high and low, to no avail. Anyone know where I can get this and necessary bolts?

    Thanks!

    Dan

  9. #9
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    I just don't get why Avid still uses those stupid ass washers, no one else does. Any other brake I have tried is a direct bolt on no BS spacers.
    Giant XTC 2 29er
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  10. #10
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    Quote Originally Posted by fahza29er View Post
    I just don't get why Avid still uses those stupid ass washers, no one else does. Any other brake I have tried is a direct bolt on no BS spacers.
    Though I can't say for sure, I'd wager to bet that it's due to a lack of internal pad posturing. Think about the way you set/adjust these things. Loosen --> apply brake --> tighten in-place. Your final adjustment is probably caliper offset by a scoche.

  11. #11
    rebmem rbtm
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    Quote Originally Posted by BeerHat View Post
    The 20mm Avid CPS PM adapters seem to be NLA??? I've searched high and low, to no avail. Anyone know where I can get this and necessary bolts?

    Thanks!

    Dan
    Get a bike shop to order them for you.

    A 180mm PM to PM adapter from a different brand like Shimano will work.

    CPS washers are easy to find online.

    Bolt lengths needed are 37.5mm & 32mm

  12. #12
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    Quote Originally Posted by cobba View Post

    Bolt lengths needed are 37.5mm & 32mm
    Perfect, thanks cobba, I have the CPS washers, but bolt length was my next headache. I'll probably just go with the Shimano bracket. I think they're like 11 bux if I'm remembering correctly.

    Dan

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