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Absolute Black > Gravel & CX chainrings > Oval narrow-wide > Absolute Black Oval CX SRAM DM GXP/BB30
Absolute Black
 

Absolute Black Oval CX SRAM DM GXP/BB30

Item#PriceStock
36T black
#: SRCXOV36BK
Price: $118.99
Stock: Available
SRCXOV36BK$118.99Available
38T black
#: SRCXOV38BK
Price: $118.99
Stock: Available
SRCXOV38BK$118.99Available
40T black
#: SRCXOV40BK
Price: $124.99
Stock: Available
SRCXOV40BK$124.99Available
42T black
#: SRCXOV42BK
Price: $124.99
Stock: Restock May 29, 2020
SRCXOV42BK$124.99Restock May 29, 2020
44T black
#: SRCXOV44BK
Price: $129.99
Stock: Restock May 29, 2020
SRCXOV44BK$129.99Restock May 29, 2020
46T black
#: SRCXOV46BK
Price: $129.99
Stock: Available
SRCXOV46BK$129.99Available
48T black
#: SRCXOV48BK
Price: $132.99
Stock: Available
SRCXOV48BK$132.99Available
36T red
#: SRCXOV36RD
Price: $118.99
Stock: Available
SRCXOV36RD$118.99Available
38T red
#: SRCXOV38RD
Price: $118.99
Stock: Restock May 29, 2020
SRCXOV38RD$118.99Restock May 29, 2020
40T red
#: SRCXOV40RD
Price: $124.99
Stock: Restock May 29, 2020
SRCXOV40RD$124.99Restock May 29, 2020
42T red
#: SRCXOV42RD
Price: $124.99
Stock: Available
SRCXOV42RD$124.99Available
44T red
#: SRCXOV44RD
Price: $129.99
Stock: Available
SRCXOV44RD$129.99Available
46T red
#: SRCXOV46RD
Price: $129.99
Stock: out of stock
SRCXOV46RD$129.99out of stock
48T red
#: SRCXOV48RD
Price: $132.99
Stock: Available
SRCXOV48RD$132.99Available


Overview
 
Our premium 1X Sram compatible 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. Narrow-wide chainring. Perfect choice for Cyclocross and Gravel using Sram cranks. Eagle 12spd compatible.

The Awkward Cyclist" test of Oval CX1 chainring
 
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
  • They save weight because they don't need the spider and chainring bolts.
  • 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
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): 36T (89g), 38T (94g), 40T (104g), 42T (111g), 44T (112g), 46T (123g), 48T (125g)
  • Color: Black, Racing Red
  • Compatibility: SRAM Force 22, Force 1, CX1, Rival 22, Rival 1, S900. GXP and BB30 models. Also fits SRAM XX1, X01, X0, X9, X7, S2210, S1400 GXP and Long spindle BB30 models (15mm spacer on drive side) Eagle 12spd compatible.
  • Bolts: Fits both SRAM GXP and BB30 cranks (BB30 models use 15mm spacer on drive side)
  • Materia: 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
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 CX Oval chainring to Sram crank:

Take the crank off the bike. Unscrew these 3 torx t-25 bolts from the crank arm. 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.
Chain options:
10 or 11spd 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.
 
FAQ
 
​What size should I choose?

Most CX riders choose 38T as most versatile option. If you feel strong try bigger size.

* 36T Oval chainring has the ovality of 34/38T and is best for someone who uses currently 36T round ring (also good for MTB)
* 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.
It is ideal for 1x 9/10/11 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):
36T: 159mm ; 38T: 168mm ; 40T: 176mm ; 42T: 184mm ; 44T: 193mm ; 46T: 201mm ; 48T: 210mm
 
 
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