world's best Oval chainrings that help you increase your performance by up to 9%*


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*Our studies led by the University of Primorska, Slovenia show on the above video significant differences when using absoluteBLACK Oval chainrings compared to round. Up to 9% increase of Force effectiveness, up to 7% less oxygen consumption, up to 15% less Ventilation (breathing) and up to 10% heart rate decrease when using oval chainrings versus round. What does that mean? In short, it means that you will consume less energy at the same power output using Oval chainrings so you can ride for longer and/or faster. Our data show that the higher you climb the more effort you have to put in, therefore it's important to maximize efficiency and effectiveness and you can improve both by using oval chainrings. Watch the video.


INDEPENDENT STUDY: Cycling performance improvement with oval chainrings after 1 year of adaptation

These are short excerpts from the independent study made by Dr Borut Fonda, University of Primorska, Slovenia. To read full document click here:

Download the study

"The results showed a significant increase in indices of pedaling effectiveness as well as a significant increase in gross efficiency.One of the reasons that could explain the improvements is the adaptation in ankle joint kinematics" , "Although the differences in absolute terms (e.g. total force) were not that big (~5 N), they could be interpreted in a different way. If one is pedaling at 90 rpm and is saving 5 N every pedal stroke, it sums to 27000 N (2700 kg) for every hour of cycling. Similar outcomes could be derived from the results on gross efficiency."

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Why AbsoluteBLACK oval chainrings work

Our premium Oval chainrings work because riders do not produce power evenly through a pedal stroke – the musculature of human legs makes it difficult to maintain an even power delivery to a round chainring.

Believe it (or not), but a round chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. Oval rings work with the natural human physiology. Oval chainrings maximize the part of the stroke where power is produced and minimize 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.

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Why using oval chainrings matters

AbsoluteBLACK oval chainrings deliver power more smoothly to your rear wheel. This means you are better able to generate and maintain constant cadence. Because oval chainrings reduce the peak loads on knee joints,

riders using them get less stress on the joints (knees) and therefore are able to keep certain level of effort for longer. This results in higher average speed. You don’t need to take our word at AbsoluteBLACK; 11 scientific studies by leading universities around the globe show that; in comparison to round chainrings, when using oval chainrings, human legs utilize more muscle groups - but each of them to lesser degree. The overall Load from pedalling an oval chainring is spread over greater muscle mass.

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.

The compound effect of switching to oval chainrings; the relaxed legs, added climbing ability and reduction of cramp means your overall enjoyment of the ride is enhanced. On MTB side In addition rear tire traction improves greatly on loose and slippery terrain when using oval. Climbing becomes much easier in demanding terrain.

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We produce the highest quality, beautifully designed and engineered oval chainrings on the market with impeccable attention to detail. Absoluteblack is the largest mountain bike oval chainring manufacturer in the World with years of expertise in this field.


Designed in United Kingdom, manufactured in Poland using German materials.
Truly European products.

Share your Oval chainring photos with us on Instagram: #OvalThis #absoluteBLACK #OVALREVOLUTION


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