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  • Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring
  • Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring
  • Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring Detail
  • Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring Detail
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Absolute BlackSRAM Oval Boost148 Direct Mount Traction Chainring

Item # ABC0002

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  • Black/3mm Offset, 28t ($67.99)
  • Black/3mm Offset, 30t ($67.99)
  • Black/3mm Offset, 32t ($67.99)
  • Black/3mm Offset, 34t ($67.99)
  • Red/3mm Offset, 28t ($67.99)
  • Red/3mm Offset, 30t ($67.99)
  • Red/3mm Offset, 32t ($67.99)
  • Red/3mm Offset, 34t ($67.99)
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Item # ABC0002

An elliptical boost.

Boost your SRAM drivetrain with the Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring. It features a Boost-specific 52mm chainline , a narrow-wide tooth profile for chain retention, and a range of off-road-appropriate sizing. Absolute Black claims that its oval rings result in smoother rotation and improved traction compared to standard, round chainrings, and this oval chainring is compatible with SRAM GXP and BB30 long spindle cranksets that allow direct-mount chainrings.

Tech SpecsWeight
Tech Specs
CNC machined 7075 Txxx aluminum
Number of Rings
28 t, 30 t, 32 t, 34 t
Compatible Components
GXP and long spindle BB30, Boost 148 bikes, SRAM XX1, SRAM X01, SRAM X1, SRAM X0, SRAM X9, SRAM X7, SRAM S2210, SRAM S1400, Truvativ AKA
Recommended Use
mountain bike
Manufacturer Warranty
limited lifetime

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead



Black/3mm Offset, 28t
Black/3mm Offset, 30t
Black/3mm Offset, 32t
Black/3mm Offset, 34t
Red/3mm Offset, 28t
Red/3mm Offset, 30t
Red/3mm Offset, 32t
Red/3mm Offset, 34t

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[28t] 50 g, [30t] 55 g, [32t] 59 g, [34t] 66 g

Reviews & Community


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Great little extra punch

  • Familiarity: I've used it several times

While an oval ring is not going to make a huge difference in pedaling, it will make a difference on technical and steep climbs. After 50 miles of riding I can say it helps a bit. I do not think I will go back after the oval ring.

Bike Bling With A Purpose

  • Familiarity: I've put it through the wringer

After putting a decent amount of miles on my new chanring, I can say that I'm an oval fan for life! I have always tended to be a "masher" on my pedals and sometimes struggle to find a good rhythm during long climbs. The oval design has really helped me smooth out my pedal stroke and gain some efficiency while going uphill. I was skeptical of the oval making my pedal rotations feel strange but I don't notice any difference from my normal round chainring.

As far as quality goes, I can tell that its a well-made product that will last me a long time. It also doesn't hurt that Absolute Black offers it in some awesome colors so you can bling out your bike!

If you have any questions, shoot me an email at

Easier climb, higher top end

  • Familiarity: I've put it through the wringer

Love mine. Switched from 32T round and won''t go back. You won't either!

Insta-fan. Oval for life!

  • Familiarity: I've used it once or twice and have initial impressions

It feels like having uniform effort throughout the entire pedal stroke. The oval gives you a power boost at your strongest in the pedal stroke and extra torque when you're the most vulnerable. I used to get hung up on rocks in that vulnerable part of my pedal stroke and now I keep my momentum. It's less tiring to not get robbed of energy with ill-timed bumps. I also don't have to worry as much about ratcheting to get over certain things. I went from 32T round to 32T oval. The lackluster studies test oval chainrings on the road, while the biggest benefits are on the mountain.

No oval puns, just solid rings

  • Familiarity: I've used it several times

Oval isn't for everyone, but everyone should at least give it a shot. If you clock it properly, you'll notice an increase in your pedaling smoothness. It's just that simple! A lot of folks will find that it messes up their rhythm when standing, but it's not particularly difficult to adjust to. The construction and quality of the rings are excellent, but do be aware that they have a very glossy metallic finish. Be sure to let me know if you have any questions!

Oval it's the new round

    I started running Rotor oval rings on my road bikes almost almost 10 years ago and when I was able to get an oval for my direct drive eagle crank I jumped right on it.

    Oval's don't feel oval they feel round and when you hit that super steep climb you'll appreciate what will be the new normal.

    A ring deserved of its own office!

    • Familiarity: I've put it through the wringer

    There has been many a noteworthy ring throughout the course of history, royal engagement rings, the Spaceballs Schwartz Ring, the One Ring to rule them all. So when I heard about these fancy new oval rings, my first though was that they seemed gimmicky and overly hyped up. I was very reluctant to try one out.

    Then one day, while I was out trimming my driveway hedge, I thought about the Hanna-Barbera cartoons in which many vehicle wheels are in oval shapes . This made me chuckle and then brought the idea of an oval chain ring into my head. I immediately dropped my hedge trimmer and ran inside to order this AbsoluteBlack ring for my GX Eagle Drivetrain.

    The first thing I noticed was the beautiful tooling marks that were left to be admired. I threw it on at the 4 o'clock position relative to the drive-side crank and off I went. My initial impression came as a surprise to me. I immediately noticed how it smoothed climbs out and helped reduce the chronic pain in my knees that I experience on more punchy climbs.

    Personally, I am not one for assigning inanimate objects offices, but I do believe this one is a home-run and is thus deserving of one. See my photo below for this proposed office.

    A ring deserved of its own office!

    Smooth it out

    • Familiarity: I've put it through the wringer

    Couple things I've noticed about oval chainrings:
    - Smooths out your pedal stroke/cadence when you're not powering down.
    - Ratcheting back while climbing technical sections becomes much more effective.
    - Reduces the amount of side to side movement on the bike to generate power.
    - Not really noticeable after first few pedal strokes.
    - Typically ride a 32T circular chainring, but I feel I could go 34T without any issues.

    All in all, I was very skeptical at first. It seemed gimmicky. However, it does have it's advantages over circular chainrings. It's not going to make you a climbing pro overnight, but it does help quite a bit.

    Cool little chainring

    • Familiarity: I've used it several times

    Been using this for the past couple weeks and have no complaints. Light and stylish with the added bonus of the oval design it makes the pedal up even better. Great choice.

    Light, Rad

    • Familiarity: I've put it through the wringer

    Super sweet chainring. Recently installed and I love this thing. Lightweight and reliable. Has helped me on some rough rides in more than one way. Love these things.

    Avg. ride time: 1h 51m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Great Upgrade For Your Bike

      I really like the elliptical ring. I think my pedal stroke feels smoother and I can last a little longer before having to gear down. I am not noticing a huge advantage, but definitely no disadvantage. If you are in the market for a new ring, go for it!

      Unanswered Question

      The compatibility specs here do not match Absolute Black's site. Have they just added all the Eagle to their list when SRAM came up with 12 speed or is this ring on your site an older product?


      • Familiarity: I've put it through the wringer

      I'll be the first to admit that the hype behind the oval rings had me extremely skeptical. But I also admit that my pedal efficiency was sub-par at best. Installing the oval ring allowed me to do two things. I was able to go up 2 teeth on my chainring size, allowing me to have more of a low-end without spinning, and increase my pedal efficiency while climbing. If you're having issues with your riding, give this a try. It's not a bad upgrade at all, and feels so much smoother!

      phat tire drivetrain sauce

      • Familiarity: I've put it through the wringer

      My bike fleet is getting all boosted. And I'm running fatter and fatter rubber. I've long been a fan of the absolute black parts and I think (psychologically at least!) the oval rings help in putting the power down. The boosted ring now helps in getting the correct chainline AND clearing wide rubber in back. Flipping a standard ring also works but I think it puts your ring a little further outbound than needed. If you're upgrading/updating your crank ring, I don't think you can go wrong with this.

      Great on some, not on others...

      • Familiarity: I've put it through the wringer

      Lets start by me telling you that I installed this ring on my Specialized 6fattie with 27.5+ tires. I went from a 28t round to a 30t oval.
      Appearance wise, this thing is gorgeous. I loved it from the minute I took it out of the box. Fit and finish is awesome and its a breeze to install. Looking at this thing mounted on the bike with the AB bash guard is total bike porn.
      Now for performance. Dont think that your gonna feel some huge difference. What you feel is that your drivetrain is smoother and your able to spin circles alittle easier. This will definitely help you on flat trails and long climbs. If you ride alot of XC or fire roads, I highly recommend adding this to your arsenal.
      So here's the reason im giving this 4 stars and not 5. I cant seem to clean those short technical climbs like I did with a round chainring. Im finding myself spinning out on climbs I never had an issue with. It just seems like I cant control my power output on those sections of trail anymore and its a bit frustrating. Multiple rides on the same trails and I spin out on the same short climbs. Conditions havent been the best lately since its late winter and pretty slick but I will def report back when it dries up a bit.
      So to sum it up, its a nice piece. Its amazing on some sections of trails, not on others. At least thats what im getting out of it so far.
      *Update* So after a season of riding, I have to say, im really happy with the performance. In any conditions, once you get used to your power output, you will climb technical sections like you know what your doing. Its really just a matter of learning that you might need to be in a higher gear than your used to or you need to really control power output and maybe not mash the peddles so much as spin them! Def going from 4 to 5 stars!

      spin out like, too much wheel spin? you did say that you went up 2 teeth, that makes for more torque? I'm considering going from 32 to 34, would you have rather stayed at 28 with the oval?

      Yes, was getting way too much wheel spin on short technical climbs. I went up 2 teeth, from what I read, a 30 tooth oval would be the same as a 28 tooth round. After riding all season and rarely getting into my lower gears, I would probably have went up to 32 or 34 teeth. Im not sure about the torque but at the same cadence, you would get more speed out of a larger chain ring.

      Yes James, I had the same experience with this gear in technical sections. In fact, I ended up flying over the handlebars going UP a steep technical section--hard to explain but I think that by having variable mechanical advantage at different phases of the pedal stroke , it can yield unexpected results when negotiating technical terrain that requires precise pedaling. I would recommend getting acclimated on non-technical terrain before riding technical sections. I may give it another try but for now, I am back running a round ring.