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Absolute Black > Road chainrings > Oval > Absolute Black OVAL AERO SRAM direct mount 1X narrow wide

Absolute Black OVAL AERO SRAM direct mount 1X narrow wide

$112.50 CAD
$224.99
Absolute Black
50%
 

Absolute Black OVAL AERO SRAM direct mount 1X narrow wide

Absolute Black OVAL AERO SRAM direct mount 1X narrow wide

$112.50 CAD
$224.99
Tooth Count
50T
Colors
Quantity
50T black
SRAERONW50BK
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Overview
 
Our premium Sram compatible 1X Aerodynamic Direct mount Oval chainring is designed for Sram cranks like Force and Rival where spider can be replaced with direct mount chainring. Fits both GXP and BB30 spindle cranks. This is 1X narrow-wide chainring. Ideal for Triathlon, Criteriums and Time Trial.

Who will benefit from 1X Aero chainring for Sram cranks
It is designed for anyone who is looking for additional gains in aerodynamics and increased performance. Will suit best to Triathlon, TimeTrial or Criterium bike where one chainring on the front can be used with great success. Chainring feature our unique narrow-wide teeth profile for chainguide free build.
 
Advantages of our special Aero Direct mount chainrings:
  • Most aerodynamic chainring ever created that fits directly on the crank arm.
  • Finest design to provide excellent weight to strength ratio and aerodynamics (Patent Pending grooved structure)
  • One of a kind special oval shape that helps you climb faster (Patent Pending)
  • Unique Patent Pending narrow-wide teeth profiles to keep your chain in place with no guide.
  • Superb quality and great look.
  • You will ride faster using ovals. If you keep using round ring then others will get quicker.
  • You will not "feel" the oval shape at all 
  • Reduces stress on knees and helps to maintain your legs fresher for longer 
  • Reduces possibility of cramps
  • Lastly, no need for using "aero" covers anymore.
The most advanced, Patent Pending narrow/wide tooth profile currently produced, guarantee minimum 12 months of excellent chain retention capabilities! We mean it. Always use a new chain with a new chainring.
Not convinced yet? Read what other customers write.
Specs
 
  • Size (Mass +/-1g): 50T (197g), 52T & 54T- Coming soon
  • Color: Black
  • Compatibility: SRAM Force 22, Force 1, CX1, Rival 22, Rival 1, S900. GXP and BB30 models
  • Material & Finish: cnc machined 7075 Txxx Aluminum. Long-lasting construction
    type II anodizing
  • Ovality: 10.45% and Timing of 108.3° after TDC (top dead center) Patent Pending
Designed in United Kingdom, manufactured in Poland using German materials. Truly European products.
 
Why Oval

Why our oval chainrings work
Our traction Oval chainrings work because a rider does not produce power evenly through a pedal stroke; they maximize the part of the stroke where power is produced and minimize resistance where it isn't. Oval rings make the spin cycle a lot smoother and are easier on legs while climbing. Believe it (or not), but a round chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. You will actually feel your stroke to be more "round" with an Oval shape than with a round chainring.

Why it matters
Traction, Traction and Traction. With oval rings rear tire traction improves greatly on loose and slippery terrain. Smoother power delivery to your rear wheel means that you will be able to maintain better, constant cadence; get less stress on the joints (knees) and therefore be able to keep certain level of effort for longer. This results in higher average speed. Moreover, 11 studies made by various Universities in the World show that using oval chainrings human legs utilize more muscle groups (compared to round one), but each of them to lesser degree. Load from pedaling an oval chainring is spread over greater muscle mass which in effect gives you the feeling of fresher and more relaxed legs. It is world's finest oval chainring backed by tens of thousands of customers.
Technology
 
Word on BIOPACE
Please understand that this is not Biopace technology. Shimano created Biopace with the completely wrong orientation of the biggest radius of the oval. Instead of positioning it in power zone which is slightly below the level of the crank, they clocked it to the dead zone where human generates least power. The result was that in power zone pedaling was too easy and in dead zone very difficult. Exactly opposite to how it should be.

Round rings do not optimize the way humans produce power

Other elliptical chainrings
Clocking (timing) and shape of the oval are the most crucial parts of the design. Ride quality of Absoluteblack Oval ring will be different to ovals from brand X or Y. 2 years of development of our ovals resulted in commercially most successful product of its kind. AbsoluteBlack is the First company who managed to successfully popularize ovals in mountainbike sport. Please note: Other manufacturers offer one timing and ovality setting for all chainring sizes, but pedaling behavior changes with each size considerably. To optimize for this, every chainring size needs to be a bit different. For example the smaller the chainring size the bigger the ovality has to be to help climb steeper hills more effectively. This is where we specialize in and optimize every size to particular pedaling style. This is also why we do not provide information about timing and exact ovality of the chainring as each one is different.

 

Shifting quality and technology
Both, inner and outer oval chainrings are optimized with smooth shifting in mind. This is why the back of the Absolute Black Oval road chainring does not feature cutouts, like other oval products on the market. Instead, we design smooth angled surfaces, to help chain to slide quickly and precisely between chainrings. Absolute Black outer oval chainrings have 6 up-shifting ramps, for easy and quick gear change, even under load. Each outer chainring also features 12 down-shifting points. Instead of steel shifting pins we use a CNC machined "ramp and recess" solution. Special raised ramps work in conjunction with the tooth recesses to stabilize the chain when shifting. Our oval chainrings DO NOT require any modification to the front dérailleur in order to work properly (apart from small standard adjustment)

How Absolute Black Oval Rings Shift
 
The importance of timing and shape with oval chainrings
The oval chainring movement across all cycling disciplines is growing rapidly, led by absoluteBLACK, the world leaders in this important product category.

However, not all oval chainrings share the same performance characteristics as absoluteBLACK. The 'clocking' (timing) and shape of the oval are the most crucial parts of any oval chainring design, absoluteBLACK spent three years in design development and have perfected both timing and shape design elements - ensuring the ride quality of absoluteBLACK oval ring will be different and superior to ovals from other brands (as many abosluteBLACK customers already realised).

Where most other brands retain the same timing (position of the crank arm relative to the oval) and shape of the oval across all their sizes - because it's cheaper and less time consuming. absoluteBLACK believe that each different size ring requires a bespoke, optimised, perfect pedalling solution. So that is what we do - for every chainring absoluteBLACK make. For example, the smaller the chainring size, the bigger the ovality has to be to help climb steeper hills more effectively. We keep our exact Patent Pending data a secret, to ensure we get the best possible absoluteBLACK advantage over other brands, and you get the best possible ride experience.
 
Installation
 
How to mount Aero Oval chainring to Sram crank:
First you need to remove crank from the bike. Once removed, unscrew these 3 torx t-25 bolts from the crank. Then remove the spider+chainring combo you currently have there. Clean the splines and put some grease on them. Position the chainring in place (note there is only one way to fit this Sram chainring so you don't have to worry how to do it). Close all 3 bolts to about 5-7Nm.
 
Absolute Black always recommends using a new chain when fitting new chainrings.
 
Aerodynamic
 
Why our oval chainring is more aerodynamic than any other offering.
Why our oval chainring is more aerodynamic than any other offering.

Firstly, direct mount full body chainring will always be more aerodynamic than 4 or 5 bolt spider options. Secondly, our unique grooved outer surface reduces drag even further. 
It is well known feature that the drag coefficient on a dimpled golf ball is much lower than that on smooth ball. Numerous studies showed that turbulence is generated through the instability of shear layer separating from the edge of dimples and delays flow separation which makes it more aerodynamic. Dimpled structure generate 220% less drag than a smooth surface. However recent studies made by golf industry leaders show that new grooved surface can be made with almost same drag reduction vs smooth surface. Why it matters? Because grooved surface is more practical to manufacture on various bike parts like chainrings. Grooved surface could greatly reduce drag generated by big smooth „aerodynamic” chainrings currently offered on the market. 
Few facts you should know: 
*It is well documented that grooved surface on the sphere generates less drag when rotating well below 150rpm. In fact it generates least amount of drag when not rotating at all! 
*It is well documented that grooved surface generates least amount of drag when traveling at speeds around 10-15m/s (36-54km/h) These parameters fit well to how we ride the bike. Hence grooved surface on various flat parts, like Absoluteblack Aero chainrings is the most preferable way of further drag reduction.
 
FAQ
 
* Do I have a perfect pedal spin?
This is an important one. Professionals and semi pro cyclists spin perfect "circles". The rest of us often struggle with our pedalling action, simply because we don't spend every day of every week on the bike, to master this skill. Switching to oval rings effectively correct an imperfect pedalling action – delivering the smooth power delivery the pros developed through thousands of hours of training. One of the key reasons the benefits of oval chainrings have historically proven hard to prove in lab tests, is because they were nearly always done using Professional riders – as a user group they are the least likely to gain a performance increase from a switch to oval, as their pedalling is already close to perfection. Where ovals shine however is with rest of us, who ride for pleasure and not for a job. Simply 99% of road cyclists will benefit from having oval chainrings on their bikes.
 
Why our Oval chainrings do not have adjustable timing
At Absolute Black we have extensively studied the relevant performance data regarding the optimum percentage of ovality, shape and, critically, the timing of the oval – the positioning of the high and low points of the oval, in relation to the position of the crank arm and focus this into one single mounting position – this is the really important part of what makes Absolute Black Oval chainrings so effective. By simplifying our oval chainring design, to reflect a single high performance ‘sweet-spot', we are able to make the process of fitting Absolute Black oval chainrings faster and easier, as well as making our rings even lighter.
 
 



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