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  1. #1
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    Absoluteblack Oval chainrings

    I am thinking of purchasing an Absoluteblack oval chain ring for my framed alaskan alloy with a wolfstooth rear cog. Will the top pulley on my sram X7 derailleur clear when the oval causes the cage to pulse? Anyone tried one yet??? Let me know...It seems like it could offer and advantage.
    Last edited by David Brody; 02-23-2016 at 09:13 PM. Reason: misspelled name

  2. #2
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    Absoluteblack? I have one on my alloy and it works fine.

  3. #3
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    huge thread on all permutations, OVAL rings - unfair advantage in singlespeed?

    I have a 34T oval on my SS and a 32T oval on my 1x10 XT with 42T Wolftooth, works great esp with the SS.

    Quote Originally Posted by David Brody View Post
    I am thinking of purchasing an Almostblack oval chain ring for my framed alaskan alloy with a wolfstooth rear cog. Will the top pulley on my sram X7 derailleur clear when the oval causes the cage to pulse? Anyone tried one yet??? Let me know...It seems like it could offer and advantage.
    Absoluteblack Oval chainrings-sram_oval_chainring.jpg

  4. #4
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    I have a 30t on my fat bike and a 32 on my single speed. I like them for these applications, where I find I need to grind out a little bit too tall of a gear.

    I tried the 32t on my geared mountain bike and did not care for it in that application. To me, it just doesn't feel right at higher speeds when momentum is more of a factor.

  5. #5
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    If the top pulley doesn't clear, couldn't you just do another turn of the b screw and be done?

  6. #6
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    Can't imagine there'd be a problem. It's cool to see oval chainrings again. My '87 Ross Mt. Hood had oval chainrings, Shimano Biopace...I dug it.

  7. #7
    bigger than you.
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    I'm running RaceFace elliptical rings on my 907 and Bucksaw. I love them. They feel like I'm a gear lower, but go like I'm a gear higher.

  8. #8
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    I think the number of teeth engaged is the same regardless of the crank position so I wouldn't expect that the derailleur would jump (which would be bad) as the ring turns. I will be using it on my SS (fatty season) and am in the process of swapping out the drive train so I can't comment further.
    I don't know why,... it's just MUSS easier to pedal than the other ones.

  9. #9
    All fat, all the time.
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    Almostblack

  10. #10
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    I guess so

  11. #11
    Thingamejigger
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    Quote Originally Posted by dbhammercycle View Post
    I think the number of teeth engaged is the same regardless of the crank position so I wouldn't expect that the derailleur would jump.
    The whole point is less 4 less teeth on the top of the stroke to reduce the gearing. Your rear mech will pulse, mine certainly does as the chain lengthens and shortens (I have a 28t).

    Depending on the number of teeth you have this may vary as the ovality on the AB ring varies with the size.

  12. #12
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    ^So, I'll have to leave some slack in the ol' SS chain? hmmm...
    I don't know why,... it's just MUSS easier to pedal than the other ones.

  13. #13
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    Quote Originally Posted by dbhammercycle View Post
    ^So, I'll have to leave some slack in the ol' SS chain? hmmm...
    There's a post specifically addressing this by the manufacturer in their long thread in the drivetrain forum. You'd have to search for it.
    Essentially, there's a specific position they recommend to place the cranks in when tensioning the chain. I believe it was something like 1-2mm of chain slack develops over a rotation, not enough to drop off the teeth off 30-34T rings.

  14. #14
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    2015 Salsa Blackborow 1
    2013 Intense Spider Comp
    2009 Spec Tricross Sport

  15. #15
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    I have a 28t oval Absolute Black ring with a 9 speed X7 der and have had no issues in 600+mi this winter.

    -Nolan

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