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Absolute Black > Mountain chainrings > Oval narrow-wide > Absolute Black OVAL XTR M9000 assymetrical chainring N/W
Absolute Black
 

Absolute Black OVAL XTR M9000 assymetrical chainring N/W

Item#PriceStock
30T (integrated threads)
#: OV96XTR/30BK
Price: $99.99
Stock: In stock
OV96XTR/30BK$99.99In stock
32T (integrated threads)
#: OV96XTR/32BK
Price: $99.99
Stock: Restock Aug 21, 2020
OV96XTR/32BK$99.99Restock Aug 21, 2020
34T (integrated threads)
#: OV96XTR/34BK
Price: $99.99
Stock: In stock
OV96XTR/34BK$99.99In stock


Overview

Our Premium 1X Oval 96BCD traction chainring is designed for Shimano XTR M9000 and M9020 cranks Only. They feature exactly same oval shape as rest of our oval chainring portfolio. They are not compatible with XT M8000 cranks.

Advantages of our special 104 & 64bcd chainrings:
  • Finest design to provide excellent weight to strength ratio
  • One of a kind special oval shape (Patent Pending)
  • Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
  • All rings have built in threads for easy of mounting and reduction in weight
  • 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
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.
Specs
  • Size (Mass +/-1g): 30T (44g), 32T (53g), 34T (63g)
  • Color: Black onlyatibility
  • Compatibility: Fits only Shimano XTR M9000 and M9020 cranksets
  • Material: cnc machined 7075 Txxx Aluminum. Long-lasting construction!
  • Finish type II anodizing
  • Mounting holes 4 x 96mm BCD Asymmetrical design. Original M7 bolts only
  • Ovality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3 after TDC (top dead center) Patent Pending

All 3 sizes have built-in M7 threaded standoffs to provide the ideal 1X chainline. They improve stock Shimano chainline by 1mm.You can only use Oryginal Shimano M7 bolts with these chainrings(they come with crank).

 
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.

 

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 Absoluteblack oval chainring:
There is a small mark (triangle shaped) on the inner circumference of the chainring. This mark Must sit behind the crank arm.
 
Chain options
10, 11 or 12spd chain for geared bike or 6-9 spd one for SS (1/8" also fits). 

Chainguide needed?
No. But if you want one then chain guide should have 2 teeth more capacity than nominal oval ring size.
 
FAQ

What size should I choose?

  • 30T Oval chainring has an ovality of 28/32T and is best for someone who uses currently 28 or 30T round ring.
  • 32T oval ring will suit best someone who uses 31 or 32T chainring currently. While pedaling, you will feel quite similar effort to the one riding round 31T ring ( the smallest diameter of the oval is 30T), but you will gain the speed similar to riding 33/34T chainring.
  • 34T Oval chainring has an ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring.


Frame clearance (biggest dimension of the oval tip to tip of tooth):

  • 30T: 134mm
  • 32T: 143mm
  • 34T: 151mm
 
It is ideal for 1x 10/11 and Singlespeeds. Oval (elliptical) chainring does not compromise the work of clutch mechanism in rear derailleur(video at the bottom). It also does not require chain tensioner when using in singlespeed application. Riding out of saddle on the uphill will become more pleasant.

Ovality of the chainring is in range of 10-14% (dependent on size) and feels perfectly round when riding. These chainrings also help you to recover after knee injuries as pedaling becomes smoother and less exhausting. It is the most advanced oval chainring currently on the market.
 
 
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