OVAL direct mount chainring for EASTON EC90SL

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$84.99
Size
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Availability

38T In Stock. Other sizes available around 5th Jan. Pre-order now!


Our premium 1X Easton compatible, Direct mount Oval chainring is designed for Easton EC90SL cranks specifically. Super stiff, mud optimized narrow-wide chainring is a Perfect choice for Cyclocross and Gravel setup. Eagle 12spd compatible.

Size (Mass +/-1g):

38T (94g), 40T (101g), 42T (108g), 44T (109g), 46T (120g), 48T (122g)

Color

Black, Racing Red

Compatibility

Easton Cinch(tm) EC90SL cranks and RaceFace Cinch cranks. Eagle 12spd compatible.

Material

cnc machined 7075 Txxx Aluminum. Long-lasting construction

Finish

type II anodizing

Ovality

Optimized to each size separately. Range: 10.2-12.1% and Timing of 110.5-112.3° after TDC (top dead center) Patent Pending

Advantages of our special Direct mount 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!
*Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
*Designed to handle mud and grass with easy
*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

Why our oval chainrings work

Our 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?

Most CX riders choose 38T as most versatile option. For Gravel 44 or 46T is a good start. If you feel strong try bigger size.

* 38T Oval ring will suit best someone who uses 37 or 38T chainring currently. While pedaling, you will feel similar effort to the one riding round 37T ring, but you will gain the speed similar to riding 40T chainring.

* 40T Oval chainring has an ovality of 38/42T and is best for someone who uses currently 39 or 40T round ring.

* 42T Oval chainring has an ovality of 40/44T and is best for someone who uses currently 41 or 42T round ring.

* 44T Oval chainring has an ovality of 42/46T and is best for someone who uses currently 43 or 44T round ring.

* 46T Oval chainring has an ovality of 44/48T and is best for someone who uses currently 45 or 46T round ring.

* 48T Oval chainring has an ovality of 46/50T and is best for someone who uses currently 47 or 48T round ring.

How to mount AB Oval chainring to Easton Cinch crank:

CINCH is a system used by Easton and RaceFace to secure a chainring on the crank. Hence same way of mounting apply. AB chainring has a mark on the backside that you need to line up with the center of the crank arm to achieve the correct position. Once this is done use BB key to close the lockring (torque spec written on the lockring itself)

Instruction how to mount absoluteblack oval chainring on the Easton EC90SL cranks

It is ideal for 1x 9/10/11/12 system 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.

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):

38T: 168mm ; 40T: 176mm ; 42T: 184mm ; 44T: 193mm ; 46T: 201mm ; 48T: 210mm

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.

Chain options

10, 11 or 12spd chain for geared bike or 6-8 spd for SS. 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.

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Designed in UK. Manufactured in Poland (EU).

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.

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The World's best oval (elliptical) gravel spiderless traction chainring - period!. Non circular chainrings, Non-round chainrings. Asymmetrical chainrings.

Eagle is a trademark of SRAM; Easton, Cinch, EC90SL are trademarks of Easton and are used for informational purposes only.

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