absoluteBLACK Oval Chairning for 104/64 BCD

Item number: 58899
from 39.92€

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absoluteBLACK Oval Chairning for 104/64 BCD - black/34 tooth
absoluteBLACK Oval Chairning for 104/64 BCD - black/32 tooth
absoluteBLACK Oval Chairning for 104/64 BCD - black/30 tooth
absoluteBLACK Oval Chairning for 104/64 BCD - black/30 tooth
absoluteBLACK Oval Chairning for 104/64 BCD - black/30 tooth
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Ovality by top specialists: the 104/64 BCD chainrings by absoluteBLACK

These premium 1X 104 & 64 BCD oval traction chainrings by absoluteBLACK are designed for any cranks that use 104 BCD mounting interface. This is the most common mounting standard for Shimano and other 4 arm cranks.


Application: Cross Country, All Mountain, Trail, Enduro
Mount: 104/64 mm bolt circle diameter, 4-arm
Teeth: 26t, 28t, 30t, 32t, 34t, 36t
Gearing: 1x9-speed, 1x10-speed, 1x11-speed, 1x12-speed
Type: oval, 10.2 - 14.4 %

Technical Information:

Chainline: 46 mm (26/28t), 48 mm (30t), 48.5 mm (32t), 50 mm (34/36t)
Material: aluminium (7075)


- for all cranks with 4x 104/64 BCD interface (e. g. Shimano XT / ZEE / Deore / SLX / XTR, Race Face, FSA, E13 and many more)


- 26-28t: 64 BCD, 30-36t: 104 BCD
- 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
- ovality and timing (110.5-116.3°) optimised for each size separately (TDC technology, top dead center)
- 32t chainring has built-in 2 mm spacers and threaded holes (M8 x 0.75) to accommodate this size on spider
- 30t chainring has built-in 2.5 mm spacers and threaded holes (M8 / M5) to accommodate this size on spider
- other sizes have regular 10 mm holes
- 10, 11 or Eagle 12spd chain for geared bike or 6-8 spd (or 1/8" ) 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: OV26
28 tooth: OV28
30 tooth: OV30
32 tooth: OV32
34 tooth: OV34
36 tooth: OV36


- 1 x absoluteBLACK 104/64 BCD oval chainring
- 2 x M8 aluminium bolts T30 torx (30t only)
- 2 x M5 steel bolts T25 torx (30t only)
- 2 x eccentric spacers (30t only)


  • black/26 tooth: 35 g
  • black/28 tooth: 42 g
  • black/30 tooth: 36 g
  • black/32 tooth: 41 g
  • black/34 tooth: 44 g
  • black/36 tooth: 53 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
  • black/36 tooth

Customer Reviews (2)


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Customer Reviews (2)


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by Bernd M.  on 06.05.2020 (modified on 26.05.2020)
verified purchase

Macht genau das was es soll.
Bin ein Fan von ovalen Kettenblättern geworden, weil der Tritt spürbar runder im Vergleich zu einem runden Kettenblatt ist.
Qualität ansonsten auch überzeugend, von der ersten Fahrt an läuft der Antrieb in Kombination mit (gleichzeitig gewechselter und neuer) 11 Fach Sram PC XX1 Kette und Sram X01 Kassette sauber und leise.

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by Hendrik S.  on 08.11.2018
verified purchase
2 of 2 customers found this review helpful.

-gute Verarbeitung (gefräst)
-längere Zähne als die normalen Sram Eagle Blätter (bessere Kettenführung)
-einfache Montage (die kleine Nase dient als Orientierung zum Kurbelarm hin)
-Ovalisierung bringt deutliche Entlastung für die Knie und einen runderen Tritt (kein Totpunkt der Trittleistung mehr)

Einzig Negatives:
-Anfangs auf ersten KM und am Montageständer erschreckend lauter Kettenlauf; fuhr sich nach der ersten Trainingsrunde aber ein

=> Super Alternative zu dem Sram Eagle Blatt. Es ist deutlich günstiger, und aus Erfahrung mit der Direct Mount Variante kann ich auch sagen, dass es weit über 5000km Fahrleistung hält.

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