Absolute Black OVAL Chainring

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9/5/2019 7:35 PM

Hi everyone! So I am trying to change my stock SRAM X-sync chainring with an oval one from absoluteblack. I'm currently running a 32t and would like to change to 34t oval. I'm using the SRAM NX crank which has the spider and the crank arm as one piece. When I fitted up the new chainring, it hits the chainstay so we (me w/ the bike mechanic) tried putting a spacer on the BB (XT M8000). My frame is a Mondraker Leader 2018 model. As we put the spacer, we can't completely tighten the BB and it doesn't spin freely.

What I'm thinking is, would flipping the chainring fix the issue?




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9/6/2019 8:17 AM

The jump from a 32 round to a 34 oval is massive as the widest part of a 34 oval is similar to the diameter of a 36t ring. I work for a company in the US that distributes AB and I run it on all of my bikes. I would not recommend reversing the ring. I doubt it would give you enough clearance to run a 34 anyway.

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9/6/2019 6:46 PM

Wait Shimano BB with SRAM GXP cranks?

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9/7/2019 5:27 AM



If that's your stock set-up a 34 will not fit and you're maxed at a 32T round.

If you're putting spacers behind the bracket your axle won't protrude enough on the non-driveside of the bracket to properly install cranks.

As @mfoga mentioned: If you're using a Shimano bb with Sram cranks it's definitely time for a different mechanic.

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9/8/2019 6:46 PM

austen.bickford wrote:

The jump from a 32 round to a 34 oval is massive as the widest part of a 34 oval is similar to the diameter of a 36t ring. I work for a company in the US that distributes AB and I run it on all of my bikes. I would not recommend reversing the ring. I doubt it would give you enough clearance to run a 34 anyway.

Hmm, so the only compatible oval ring will be the 30t? What a shame.

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9/8/2019 6:48 PM

Sven_Claas wrote:

If that's your stock set-up a 34 will not fit and you're maxed at a 32T round.

If you're putting spacers behind the bracket your axle won't protrude enough on the non-driveside of the bracket to properly install cranks.

As @mfoga mentioned: If you're using a Shimano bb with Sram cranks it's definitely time for a different mechanic.

We have fixed the issue on the spindle on the non drive side before when i replaced my bb. They put a sleeve so the spindle will fit. I should have checked first the max chainring diameter compatible. Waste of bucks now 😥

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