OneUp components narrow wide chainrings for Shimano XTR M9000 11-speed mountain bike crankset

With a planned launch later this month, OneUp Component’s showing of their new narrow-wide chainrings for Shimano XTR M9000 came a bit early following this morning’s announcement from competitor Wolf Tooth.

Made from the same 7075-T6 alloy as their other rings, these are anodized to color match the new XTR group. They’re made using the 96mm BCD and asymmetric bolt pattern of the new group, too.

So, what’s the difference between this and WTC’s offering? Beyond the tooth profile and color, it’s the hardware: OneUp’s will come with M9 bolt hardware that threads directly into the chainring. That’s compared to the M7 bolts that come stock with the XTR cranks, and the number refers to the bolt diameter (so, 9mm versus 7mm).

Jonathan Staples, OneUp co-owner and product designer, says this larger diameter fills the hole in spider instead of relying on the alloy nuts used with Shimano’s rings, so it gives the bolts better strength and pulling/holding power. It’s also lighter, saving a claimed 35g over the stock 1x chainring.

Like WTC, the chainline gets “corrected” from 50.4mm to 49mm. Staples says that change is primarily a wear issue, that as you’re fully crossed up on the biggest cog, you want the chainline a bit closer to that end of the cassette. It’s not as critical on the 11t cog, so they bias it toward the 42.

Weights are in the 40g to 50g range, and tooth count options are 30, 32 and 34 for now. If demand dictates, they’ll go for a 36. Available February 20th for $65 each, including hardware.

UPDATED: More pics and details below…

OneUp components narrow wide chainrings for Shimano XTR M9000 11-speed mountain bike crankset

Here’s what you save by ditching the stock covers.

OneUp components narrow wide chainrings for Shimano XTR M9000 11-speed mountain bike crankset

OneUp components narrow wide chainrings for Shimano XTR M9000 11-speed mountain bike crankset

Claimed weights:
30T – 43g
32T – 48g
34T – 57g

OneUpComponents.com

17 COMMENTS

  1. “It’s not as critical on the 11t cog, so they bias it toward toward the 42.”

    Shimano 9000, the group set being referenced, is running an 11-40 cassette.

  2. Shimano has sponsored riders opting to run an off brand ring and guide because their’s isn’t working so well. Didn’t they just raise the teeth and give them a forward-curved profile? Anyways, that crank looks uuuuugly, especially with four gaping holes in the spider.

  3. +1 Andy.
    Where is 38T and 40T? Why not manufacture rings that Shimano don’t do themself.
    I know that Shimano rings are as expensive that normal peolpe will not buy them, so the market is there anyway. But we need some more options in tooth counts!

  4. If you can’t afford to replace the chain rings, don’t buy XTR! It’s the same reason I don’t buy myself an old Rolls Royce; the car would only be £10000 but a service would be £1500 a time!

  5. David,

    For those who want a 1x setup, Shimano sells the crank arms separately from the chainrings. These aftermarket rings are a great option because they let customers save a little money while still maintaining (and maybe even improving) the performance of the group. It’s not that people can’t afford it. There’s no reason to spend $160 on a chainring that doesn’t offer improved performance over something else at a fraction of the cost.

  6. I like both companies, but it seems that Oneup and Wolf Tooth, get lots of play on this site.
    Yesterday was Wolf Tooth with there single XTR ring, today its Oneup, tommorrow probably Absolute Black?

  7. Better question: Why buy the XTR cranks in the first place? The Next SL is like 200 grams lighter for $200 less. Or you could buy the Turbine cranks which are almost the same weight for $400 less.

    This particular generation of XTR seems to be a rip off, even for XTR.

  8. wuffles one reason is some people don’t like 30mm spindles because then you get into tiny bottom brkt bearings that wear considerable faster. Shimano is still using 24mm spindles which makes for much more durable bottom brackets. RF bottom brackets still fail at an alarming rate, Shimano and Chris King, not so much. Yes I know they can and do fail, but overall, they are way more durable. When I ran 24mm spindles, I never bothered to keep a spare bottom bracket in the tool box, if you’re running the newer RF stuff you’re asking for trouble if you don’t stock an extra.

  9. Note: In my area the cranks are available, but the single chain rings are not unless you are buying Project1 from Trek, or other top-level bikes. As a drivetrain upgrade, Wolftooth and OneUp are providing chain rings not available through Shimano channels. Port slowdown, their aggressive anti-counterfeiting, and high demand scream for these alternatives.

  10. Will this fit an Shimano XT 2016 cranks? I know they made something for the XT, but i just love the finish of this XTR chain ring

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