Which chainring offset for RF Aeffect 190 crank on a fat bike with 197mm rear hub?- Mtbr.com
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  1. #1
    Fat and bouncy
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    Which chainring offset for RF Aeffect 190 crank on a fat bike with 197mm rear hub?

    Well the title says it all - I think

    I'm looking to use it for a 1 x 10 conversion from a RF Ride 2 x 10

    My confusion stems from chainring manufacturers' different recommendations and most chainlines appear to be calculated for a standard 68/73 frame;


    • RF standard cinch rings specsheet has chainline dimensions for standard or flipped that indicate a 6mm offset
    • Absolute Black list 6mm as standard and 3mm for boost and fat bikes (but should be reversed for fat bikes)
    • Supercomponents show standard as 3mm and 0mm offset for boost
    • Wolftooth show 6mm as standard and 3mm for boost.


    For info the Cube Nutrail has a PF BB so I can't adjust with spacers there, so although I'm guessing I can adjust the chainline with spacers on the crank I'm presuming there should be a basic dimension / initial setting?
    Last edited by JackWare; 09-07-2017 at 05:40 AM. Reason: Added info

  2. #2
    cmg
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    I would ask in the Fatbike section, not here.

    I dont know how wide your BB is, but with it being PF you will have to space it out on the crank.
    When doing mine (120mm BSA BB) I measured from middle of the Hub to the middle of the Cassette, think it was ~73mm, then spaced until the Chanring was 73mm from middle of frame (seat tube).
    This is on a 1X10 set up, if you are 2X10 I would set up the middle of the gap between the Chainrings at 73mm.

    Either way I recommend measuring it yourself, and using the same procedure.
    always mad and usually drunk......

  3. #3
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    Thanks cmg, it was a toss up where to post as I noticed other similar queries got moved from the FB section, were you using a RF cinch crank? If so which chainring did you use?

  4. #4
    cmg
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    Quote Originally Posted by JackWare View Post
    Thanks cmg, it was a toss up where to post as I noticed other similar queries got moved from the FB section, were you using a RF cinch crank? If so which chainring did you use?
    I have the RF Ride Fatbike Crank, as I already had RF 30T & 32T chainrings and several spare Shimano BBs, if I went Turbine or Aeffect I would've needed; Spider or Direct Mount Chainring & BB, then it starts getting expensive

    see my posts in these threads here and here
    always mad and usually drunk......

  5. #5
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    For future info;

    I purchased the Non Boost Absolute Black oval 28T chainring with 6mm offset and fitted in the standard (not flipped as recommended on the AB website), and the chainline is fine with smooth changes and a quiet chain.

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