absoluteBLACK Oval Chainring for Race Face Direct Mount (Boost)

Item number: 58909

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absoluteBLACK Oval Chainring for Race Face Direct Mount (Boost) - black/30 tooth
absoluteBLACK Oval Chainring for Race Face Direct Mount (Boost) - black/32 tooth
absoluteBLACK Oval Chainring for Race Face Direct Mount (Boost) - black/34 tooth
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Upgrade for your Race Face cranks: the oval Boost Cinch chainrings by absoluteBLACK

These premium 1X Race Face Boost 148 direct mount compatible oval chainrings by absoluteBLACK are designed for Cinch system Race Face uses to mount chainring directly to the crank. This version is for Boost 148 specific bikes and Fat Bikes (when reversed).


Application: Cross Country, All Mountain, Trail, Enduro, Fat Bike
Mount: Cinch direct mount
Teeth: 26t, 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)


- Race Face Next SL
- Race Face Sixc
- Race Face Turbine
- Race Face Atlas
- Race Face Aeffect Cinch


- for Race Face Cinch system cranks
- converts any Race Face Cinch direct mount crank into Boost 148 specific setup needed in Boost equipped bikes
- chainring is reversible and fits also Fat Bikes with 170/190mm axles
- 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)
- Optimum Chainring Adjustment (OCA): Race Face oval chainring allows you to change clocking position by 22deg both ways from initial setup
- 10, 11 or Eagle 12spd chain for geared bike or 6-9 spd for single speed (if used in 1x9 drivetrain 10spd chain must be used to obtain the performance)
- no chainguide needed


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:

26 tooth: RFOVBOOST26
28 tooth: RFOVBOOST28
30 tooth: RFOVBOOST30
32 tooth: RFOVBOOST32
34 tooth: RFOVBOOST34


- 1 x absoluteBLACK Race Face Boost Cinch oval chainring


  • black/26 tooth: 52 g
  • black/28 tooth: 54 g
  • black/30 tooth: 58 g
  • black/32 tooth: 62 g
  • black/34 tooth: 69 g


in stock 2 to 7 days up to 10 days up to 20 days inform me
  • black/26 tooth
  • black/28 tooth
  • black/30 tooth
  • black/32 tooth
  • black/34 tooth

Customer Reviews (1)


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Customer Reviews (1)


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by Christian C.  on 12.08.2019
verified purchase

Schönster Kettenblat den ich besitze. Durch die Ovale Form habe ich ein runderer Tritt und meine Knie schmerzen gehören der vergangenheit an!
Kraft ausbringung genau da wo sie benötigt wird.

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