Absolute Black OVAL Chainring

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Question
carnage001
Edited Date/Time 9/21/2020 12:28pm
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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austen.bickford
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austen.bickford 9/6/2019 8:17am
9/6/2019 8:17am
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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mfoga
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mfoga 9/6/2019 6:46pm
9/6/2019 6:46pm
Wait Shimano BB with SRAM GXP cranks?
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Sven_Claas
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Sven_Claas 9/7/2019 5:27am
9/7/2019 5:27am


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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carnage001 9/8/2019 6:46pm
9/8/2019 6:46pm
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...
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.
carnage001 9/8/2019 6:48pm
9/8/2019 6:48pm
Sven_Claas wrote:
[img]https://media.alltricks.com/hd/59a3e5a5695b3.jpg[/img] 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...


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 😥
Kelz87
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Kelz87 9/21/2020 11:43am
9/21/2020 11:43am
Is anyone else out there running the absoluteblack oval chainrings? I’m considering giving it a try but wondering if it’s worth it for my SB5.5
teamham08
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teamham08 9/21/2020 12:20pm
9/21/2020 12:20pm
Kelz87 wrote:
Is anyone else out there running the absoluteblack oval chainrings? I’m considering giving it a try but wondering if it’s worth it for my SB5.5
I've got a Sb5.5 and run an oval on it (only because I don't have the tool to remove bottom bracket and put on my cabron Sram crankset). And even then, I really like the oval so may put one on that crankset before I install it.
Kelz87
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Kelz87 9/21/2020 12:28pm
9/21/2020 12:28pm
Kelz87 wrote:
Is anyone else out there running the absoluteblack oval chainrings? I’m considering giving it a try but wondering if it’s worth it for my SB5.5
teamham08 wrote:
I've got a Sb5.5 and run an oval on it (only because I don't have the tool to remove bottom bracket and put on my cabron...
I've got a Sb5.5 and run an oval on it (only because I don't have the tool to remove bottom bracket and put on my cabron Sram crankset). And even then, I really like the oval so may put one on that crankset before I install it.
Nice, did you change the tooth size from what you were running with the round chainring?

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