absoluteBLACK Oval Chainring for SRAM Direct Mount w/ 3 mm Offset (Boost)

Item number: 58896
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absoluteBLACK Oval Chainring for SRAM Direct Mount w/ 3 mm Offset (Boost) - black/30 tooth
absoluteBLACK Oval Chainring for SRAM Direct Mount w/ 3 mm Offset (Boost) - black/34 tooth
absoluteBLACK Oval Chainring for SRAM Direct Mount w/ 3 mm Offset (Boost) - black/34 tooth
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Premium product made by specialists: the oval direct mount Boost chainrings by absoluteBLACK

The original one and only absoluteBLACK premium SRAM compatible direct mount Boost 148 1X oval chainrings are designed for GXP and long BB30 spindle cranks. Chainring is dedicated for Boost 148 bikes ONLY. Converts a regular SRAM crank into a Boost specific setup. (3 mm offset). They are also 100-percent optimized for Eagle.


Application: Cross Country, All Mountain, Trail, Enduro, Fat Bike
Mount: SRAM direct mount
Teeth: 28t, 30t, 32t, 34t
Gearing: 1x9-speed, 1x10-speed, 1x11-speed, 1x12-speed
Type: oval, 10.2 - 14.4 %

Technical Information:

Offset: 3 mm (Boost)
Chainline: 52 mm
Material: aluminium (7075)


- SRAM XX1 Eagle
- SRAM X01
- SRAM X01 Eagle
- SRAM GX Eagle
- SRAM S2210
- SRAM S1400
- Truvativ AKA


- for GXP and long spindle BB30 (15 mm spacer on drive side), Boost 148 mm bikes only
- converts any SRAM direct mount crank into Boost 148 specific setup needed in Boost equipped bikes
- designed using 3D CAD software, CNC machined, anodized
- long-lasting construction, mud optimised, decreases noise dramatically
- excellent weight to strength ratio
- greatly improves traction and climbing abilities
- unique patent pending alternate wide and narrow teeth profiles to keep your chain in place
- superb quality and great look
- faster ride, reduced stress on knees
- Boost 148 specific chainline
- ovality and timing (110.5-116.3°) optimised for each size separately (TDC technology, top dead center)


Why absoluteBLACK oval chainrings work
Oval rings work with the natural human physiology. Oval chainrings maximise the part of the stroke where power is produced and minimise resistance where it isn't. As a direct consequence, oval rings enhance a cyclist's ability to spin with a smoother power delivery and feel easier on legs while climbing.
You will actually feel your pedal stroke to be more " round" with an oval chainring than with a round chainring.

Why using oval chainrings matters
In comparison to round chainrings, when using oval chainrings, human legs utilise more muscle groups - but each of them to lesser degree. The overall load from pedalling an oval chainring is spread over a greater muscle mass, which reduces the peak loads on knee joints.
This has three key benefits: firstly, it gives you the feeling of fresher and more relaxed legs. Secondly, it allows you to achieve higher average speed riding uphill. Thirdly, spreading the pedalling load over more muscles reduces the risk of cramp, even when riding hard. This means your overall enjoyment of the ride is enhanced. On MTB side in addition rear tyre traction improves greatly on loose and slippery terrain when using oval. Climbing becomes much easier in demanding terrain.

Manufacturer Part Numbers:

28 tooth: SROVBOOST28
30 tooth: SROVBOOST30
32 tooth: SROVBOOST32
34 tooth: SROVBOOST34


- 1 x absoluteBLACK SRAM Boost direct mount oval chainring


  • black/28 tooth: 50 g
  • black/30 tooth: 55 g
  • black/32 tooth: 59 g
  • black/34 tooth: 66 g


in stock 2 to 7 days up to 10 days Out of stock inform me
  • black/28 tooth
  • black/30 tooth
  • black/32 tooth
  • black/34 tooth
  • titanium/28 tooth
  • titanium/30 tooth
  • titanium/32 tooth
  • titanium/34 tooth

Customer Reviews (6)


Customer Reviews (6)


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by Tobias M.  on 16.06.2020
verified purchase

Top Qualität. Kette ist bisher auch auf ruppigen Trails noch nie abgesprungen. Mir gefällt das Fahrgefühl mit dem ovalen Blatt, wobei man es eigentlich nur in gewissen Situationen (Sprint, steiler Uphill, loser/matschiger Untergrund) positiver Weise spürt.

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by Nikolaus S.  on 08.06.2020
verified purchase

Super effizient vor allem bei steilen, technischen Anstiegen.

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by Dominik S.  on 18.11.2019
verified purchase

Die Schaltfunktion ist unverändert zum Original SRAM Kettenblatt. Oval fährt sich anfangs etwas "unrund" aber nach Gewöhnung ist der Antritt im Steilen kraftvoller. Bisher keinerlei Schäden.

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by Marcos Alejandro H.  on 12.03.2019
verified purchase

Muy bueno, espectacular en terrenos blandos y en especial en las subidas.
Lo estoy utilizando en una Specialized Epic Comp 2019.-

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by Andreas G.  on 24.01.2019
verified purchase
1 of 1 customers found this review helpful.

Wesentlich ergonomischeres Fahrgefühl! Man fährt durchschnittlich einen Gang höher und das auch noch länger. Ist jetzt seit über 1500km in einem SRAM X01 Eagle Umfeld montiert und zeigt kaum Abnützungserscheinungen.

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by Arne P.  on 05.12.2018
verified purchase
1 of 1 customers found this review helpful.

Angenehm zum fahren auf langen Steigungen. Man gewöhnt sich schnell an das Gefühl beim Treten. Ansonsten unauffällig und tut, was es soll.

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