Convert 2015 Niner Air9 RDO to Gravel Bike - how to go beyond 32t in front?

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Convert 2015 Niner Air9 RDO to Gravel Bike - how to go beyond 32t in front?
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Posted: Jan 29, 2020 at 11:44 Quote
I was naively thinking I could easily covnert my 2015 Niner Air9 RDO into a gravel bike by swapping the 32t front chainring for a 40t.

Then I realized that Niner doesn't recommend anything larger than 32t in front.

Is there a way around this, by using an offset chainring to get to a 36t or 38t?

Here is what I have to work with:

non-boost spacing - 49 mm chainline
sram XX1 cranks with bb30
it looks like a direct mount chainring
68 Q-factor
appparently short spindle

wolf suggested an offset chainring, but i am not sure how much space that would buy me. also I am not sure how this would affect shifting.

any insight would be much appreciated!

Posted: Jan 29, 2020 at 20:22 Quote
jensnorman wrote:
I was naively thinking I could easily covnert my 2015 Niner Air9 RDO into a gravel bike by swapping the 32t front chainring for a 40t.

Then I realized that Niner doesn't recommend anything larger than 32t in front.

Is there a way around this, by using an offset chainring to get to a 36t or 38t?

Here is what I have to work with:

non-boost spacing - 49 mm chainline
sram XX1 cranks with bb30
it looks like a direct mount chainring
68 Q-factor
appparently short spindle

wolf suggested an offset chainring, but i am not sure how much space that would buy me. also I am not sure how this would affect shifting.

any insight would be much appreciated!
Find an old 3x crank, mount on the exterior of the chain ring and realize that your using a bike outside it's intended purpose and your chain line might not be great but eh eff it who cares...

Posted: Jan 30, 2020 at 3:56 Quote
jensnorman wrote:
I was naively thinking I could easily covnert my 2015 Niner Air9 RDO into a gravel bike by swapping the 32t front chainring for a 40t.

Then I realized that Niner doesn't recommend anything larger than 32t in front.

Is there a way around this, by using an offset chainring to get to a 36t or 38t?

Here is what I have to work with:

non-boost spacing - 49 mm chainline
sram XX1 cranks with bb30
it looks like a direct mount chainring
68 Q-factor
appparently short spindle

wolf suggested an offset chainring, but i am not sure how much space that would buy me. also I am not sure how this would affect shifting.

any insight would be much appreciated!
Nah, i think you are stuck - MTB is not Gravel bike, you also cannot convert Gravel to MTB... Smile
Would suggest you sell it and buy proper gravel bike if you want it so much.

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