absoluteblack OVAL 104 & 64BCD traction chainring

Oval 104 & 64BCD traction chainring

Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring Oval 104 / 64BCD chainring

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$54.00
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Our Premium 1X 104 & 64bcd Oval traction chainrings are designed for any cranks that use 104bcd mounting interface. This is the most common mounting standard for Shimano and other 4 arm cranks.

Size (Mass +/-1g):

64BCD: 26T (35g), 28T (42g)

104BCD: 32T (41g), 34T (44g), 36T (53g)

Color

Black, Racing Red , Cannondale Green

Compatibility

All cranks with 4x 104BCD interface. That means Shimano XT / Zee / Deore / SLX / XTR, Race Face, FSA, E13 and many more. 9, 10, 11 & 12spd compatible

Material

cnc machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing

Chainline

26&28T (64bcd) - 46mm ; 32T - 48.5mm ; 34&36T - 50mm

Mounting holes

4 x 104mm BCD (for 32T ring, bolts should be min 6mm long)

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

Advantages of our special 104 & 64bcd chainrings:

*We mastered our oval chainrings to perfection, so you can get best possible advantage from the oval/elliptical shape.
*Finest design to provide excellent weight to strength ratio
*One of a kind special oval shape (Patent Pending)
*Greatly improves traction and climbing abilities
*Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
*Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
*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

 32T chainring has build-in 2mm spacers and threaded holes (M8x0.75) to accommodate this size on spider. Other sizes have regular 10mm holes.

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.

What size should I choose?

* 26T (64BCD) Oval chainring has the ovality of 24/28T and is best for someone who uses currently 26T round ring.

* 28T (64BCD) Oval chainring has the ovality of 26/30T and is best for someone who uses currently 27 or 28T round ring.

* 32T oval ring will suit best someone who uses 30 or 32T chainring currently. While pedaling, you will feel quite similar effort to the one riding round 31T ring (as the smallest diameter of the oval is 30T), but you will gain the speed similar to riding 33/34T chainring.

* 34T Oval chainring has the ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring.

* 36T Oval chainring has the ovality of 34/38T and is best for someone who uses currently 36 or 38T round ring.

How to mount 104bcd 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.

In 28T oval there is a dimple instead of the triangle mark. That dimple must align with the crank arm and Must be visible to you when mounting the chainring (recesses on the mounting holes face the crank tabs)

absoluteblack oval chainring mounting instruction

Don't know what bolts to use with 32T oval chainring with integrated threads?

They are standard bolts. You can use a granny ring bolts (from 64bcd chainring) or use the ones that connect middle and big ring from 3X crank. You can also buy them from us in Bolts tab. Pick "Long" ones. Other sizes like 34 and 36T use "short" bolts.

It is ideal for 1x 9/10/11 and Singlespeeds. Oval (elliptical) chainring does not compromise the work of clutch mechanism in rear derailleur. It also does not require chain tensioner when using in singlespeed application. Riding out of saddle on the uphill will become more pleasant. 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.

The most advanced, Patent Pending narrow/wide tooth profile ever produced, guarantee minimum 12 months of excellent chain retention capabilities! We mean it. Always use a new chain with a new chainring.

Chain options

10, 11 or 12spd chain for geared bike or 6-8 spd one for SS (1/8" also fits). If used in 1x9 drivetrain - 10spd chain must be used to obtain the performance. (yes - 10spd chain will work great on 9spd cassette)

Chainguide needed?

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

MSRP: £46,99 only ......

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The World's best oval (elliptical) narrow/wide 104bcd traction chainring. Non circular chainrings, Shimano oval chainring.

Designed in UK. Manufactured in Poland (EU).

Not convinced yet? Read what other customers write in Reviews tab.

BikeJames about Oval chainring - review

PinkBike magazine Oval chainring - review

29inches magazine Oval chainring - review

OVAL rings - unfair advantage in singlespeed? MTBR forum reviews.

If you wish to check for frame clearance with new oval ring, below you can find measurement of biggest dimension of the oval (tip to tip of tooth):

26T: 118mm ; 28T: 127mm ; 32T: 143mm ; 34T: 151mm ; 36T: 159mm

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.

Other elliptical chainrings on the market


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.

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 slightly 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 exact figures about timing and ovality of the chainring as each one is special and we need to protect our Patent Pending solutions. Due to our Global popularity and success there are now more companies releasing "similar" products. But "similar" is not the same. Even very small change in parameters of the oval shape and timing gives entire different feeling and performance. We mastered our oval chainrings to perfection, so you can get best possible advantage from the oval/elliptical shape.

Proud to inform you that Silver World Champion Marek Konwa is using and testing our Shimano oval chainrings. Used also by World Champion Maja Wloszczowska. 

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