Absolute Black

104 & 64bcd Chainrings

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  • MSRP $55.99


Premium 1X, 104 & 64bcd Oval traction chainrings designed for any cranks with a 104bcd interface. This is the most common MTB crank mounting interface.

32T chainring has build-in 2mm offset/threaded holes (M8x0.75) to accommodate this size on a 104bcd spider. Other sizes have regular 10mm holes that use your stock bolts/nuts.

Size (Mass +/-1g):

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

104BCD: 30T (39g), 32T (41g), 34T (44g), 36T (53g)

Color

Black, Racing Red , Cannondale Green

Compatibility

All cranks with 4x 104BCD interface, such as Shimano XT / Zee / Deore / SLX / XTR, Race Face, FSA, E13 etc

Material

CNC machined 7075 Txxx Aluminum

Finish

type II anodizing

Mounting holes

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

Ovality

Optimized per individual chainring size. Range: 10.2-14.4% and Timing of 110.5-116.3å¡ after TDC (top dead center) Patent Pending

 

Advantages of our 104 and 64bcd oval chainrings:

  • Finest design to provide excellent strength to weight ratio
  • Patent-Pending oval shape
  • Unique Patent Pending narrow-wide tooth profiles to keep your chain in place even in aggressive conditions
  • Special 3D teeth machining for ultimate mud relief, decreased wear and noise
  • Designed to handle the rigors of mud and grass
  • Lower weight by reducing the need for a spider and chainring bolts
  • Superb quality and look.
  • Riders will not "feel" the oval shape
  • Improves traction and climbing abilities
  • Reduces knee stress

IMPORTANT:

  • 32T chainring has build-in 2mm spacers and threaded holes (M8x0.75) to accommodate this size on spider. Other sizes have regular 10mm holes.
  • 30T chainring has build-in 2.5mm spacers and threaded holes (M8 / M5) to accommodate this size on spider. It also comes with bolts and spacers in the package: 2x M8 aluminium bolts T30 torx, 2x M5 steel bolts T25 torx and 2x eccentric spacers. This is a patent pending solution.
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

HOW TO MOUNT 104BCD ABSOLUTEBLACK OVAL NARROW WIDE 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)


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 9/10/11/12spd and Singlespeeds. Oval (elliptical) narrow wide 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.



NOT CONVINCED YET? READ WHAT OTHER CUSTOMERS WRITE IN REVIEWS TAB.

Absolute Black Ovalized Wide Narrow Chainrings - bikerumor

BikeJames about Oval chainring - review

PinkBike magazine Oval chainring - review

29inches magazine Oval chainring - review

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

Round rings do not optimize the way humans produce power

Silver World Champion Marek Konwa is using and testing our Shimano oval chainrings. Used also by World Champion Maja Wloszczowska.

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

Designed in UK. Manufactured in Poland (EU).


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