Absolute Black prototype SRAM X0-X9-X7 single chainrings replace the spider and double rings

We’ve featured Absolute Black before when they launched their lightweight two-piece disc brake rotors for Centerlock and 6-bolt, as well as some prototype flat pedals.

Now, he’s got some mean looking 1x single chainrings on deck for SRAM, Shimano and FSA cranksets. Above is the direct replacement SRAM rings for modern 2×10 cranksets, including X0/X9/X7 and replaces the entire spider and chainrings with a single piece…which should drop quite a bit of weight.

According to founder Marcin, these are “almost final prototypes – non finished, without polish and anodization. The 32T weights 51g which makes it the lightest one out there! Material I use is best in class 7075 Txxx – it’s a special treatment which makes that alloy incredibly strong.”

Retail should be around $60, and they’ll likely start out through a Kickstarter campaign. We’ll let you know when it goes live.

He’s also working on 1x single chainrings for FSA and news for XX1 below…

Absolute Black prototype SRAM X0-X9-X7 single chainrings replace the spider and double rings

Absolute Black 2009-2010 FSA 94BCD replacement chainring for 1x10 conversions

From Marcin: “I have also made a chainring for 2009-2010 era FSA K-Force Light carbon cranks. It’s a weird BCD – 94mm x4 holes- but a lot of people still have them. FSA does only three chainrings in 39, 41 and 42T so there was no option for 1×10/11 or singlespeed. So I have made 33T for that crank. It weighs 33g. I have personally used it for a year on my singlespeed and it’s still like new! This one is £45 as it’s a micro batch. I have few left from the production run.”

Absolute Black 2009-2010 FSA 94BCD replacement chainring for 1x10 conversions

Absolute Black replacement lightweight chainring for SRAM XX1 drivetrains with 104BCD for Shimano and FSA cranksets

Perhaps more exciting is the forthcoming XX1-style chainring for 104BCD cranks, which will fit current FSA and many Shimano cranksets. Marcin says a 34T is just 44g, about 12g lighter than an original XX1 ring and should cost about a third less. It’s a good way to minimize the financial impact of upgrading to a 1×11 system…now you’ll just need the rear shifter, derailleur and cassette. Well, and wheels with the Driver Body or, at minimum, a new freehub.


  1. So I could replace my XO Spider & Chainring with a single chain ring that would be compatible w/ SRAMS 11 speed cassette?

  2. JR yes. Batson, I googled first and got nothing. I found an old bike rumor link for their rotors but the site it directed too hasnt been updated for a long time.

  3. JR it doesnt mention a spiderless XX1 ring but if he is making a 104 the work is done and he just has to do a spider less version. (which I cant see why he wouldnt)

  4. Yep, NSB already makes these fantastic items. Now, it would be nice if they start making smaller spiderless rings. 25T and 26T would be quite useful for the big mtn climbs, and 25×11 still leaves reasonable speed for the technical descents.

  5. SeeBee you need a type 2 horizontal only shifting (aka xx1) derailleur to run the SRAM 11 speed cassette. If you stick with 10 speed at the back you will still need a type 2 or shadow plus derailleur to maintain the chain tension and stop the chain dropping off the chainring.
    JR keep your xo 104bcd spider and crank. All you will need at the front is the new chainring.

  6. I have a terrific 27T spider/chainring combo from North Shore Billet that replaced the 26/39t double & spider on my X0 cranks. I have it teamed up with a Shimano 12-36T nine speed cassette on a steel Jones diamond frame. Older X9 nine speed trigger and RD. Makes for a terrific and simple trail set up. I only miss the bigger gears on the road, virtually never on dirt.

    Call my 1×9 a ‘poor man’s’ XX1. Tall teeth, and no chain drops yet. Works very well. Kudos not the crew at NSB.

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