Formula 140mm rotor adaptor options?- Mtbr.com
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  1. #1
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    Formula 140mm rotor adaptor options?

    Im using formula k24s and want to go down to a 140mm rear rotor. anybody have any experience with this? particularly, what are my options for adaptors? I have an avid 160mm rear adaptor that looks like it may work for a 140mm rotor once the spacers are removed. any ideas? appreciate the help.

  2. #2
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    I use a Shimano front 160mm on the rear for a 140mm on my RX's. The Avid one I tried to use had clearance issues and it would've needed filing. Do a mock set up before tighting the bolts to make sure the caliper and adaptor aren't making contact where they are not suposed too.

  3. #3
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    Quote Originally Posted by richhoare
    Im using formula k24s and want to go down to a 140mm rear rotor. anybody have any experience with this? particularly, what are my options for adaptors? I have an avid 160mm rear adaptor that looks like it may work for a 140mm rotor once the spacers are removed. any ideas? appreciate the help.
    Any 160mm front bracket is also a 140mm rear bracket.
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  4. #4
    aka bOb
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    Quote Originally Posted by shiggy
    Any 160mm front bracket is also a 140mm rear bracket.
    True but not all adapters are compatible with all calipers.

  5. #5
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    160mm front will not work

    160mm front will not work with R1 brakes may be a 180mm front may get you to 140 rear.
    I would call Formula
    there calipers are not the same as other manufacturers

  6. #6
    aka bOb
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    Quote Originally Posted by Big Foot
    160mm front will not work with R1 brakes may be a 180mm front may get you to 140 rear.
    I would call Formula
    there calipers are not the same as other manufacturers
    Really? That's odd I am running 160mm adapter with 140mm rear on RX's.
    Edit: Shimano adapter
    Attached Thumbnails Attached Thumbnails Formula 140mm rotor adaptor options?-rear-140mm.jpg  


  7. #7
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    Quote Originally Posted by shiggy
    Any 160mm front bracket is also a 140mm rear bracket.
    Not true....atleast for hayes adapters...guys at hayes tech told me specifically not to use this method of adapter switching.. just be careful cause it could **** your warranty or really your brakes if your not careful
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  8. #8
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    Quote Originally Posted by k1lluaA
    Not true....atleast for hayes adapters...guys at hayes tech told me specifically not to use this method of adapter switching.. just be careful cause it could **** your warranty or really your brakes if your not careful
    Warranty-speak. The bracket spec is the same.

    Avid shows the 160 front as also being a 140 rear as do most other brands
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  9. #9
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by Big Foot
    160mm front will not work with R1 brakes may be a 180mm front may get you to 140 rear.
    I would call Formula
    there calipers are not the same as other manufacturers
    All current Formula calipers are post mount. Any IS bracket works as long as the caliper clears.
    mtbtires.com
    The trouble with common sense is it is no longer common

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