Absolute Black Oval Road Chainring 2X 110/4 Shimano 9100/8000 (50T/52T/53T)-Black

absoluteBLACK Premium Shimano 110/4 BCD compatible oval chainrings are designed for new type of Shimano cranks Dura-Ace 9100, Ultegra 8000 & 105 R7000 only. These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality. (They can be also retrofitted to DA9000, Ultegra 6800, 105 5800 and Tiagra 4700  cranks). 10/11spd compatible.

Advantages of absoluteBlack Road Oval Chainrings:

• One of a kind special oval shape that helps you climb easier and faster (Patent Pending)
• Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction 
• Bespoke Absolute Black 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring 
• Finest design that provides excellent strength to weight ratio 
• You will not "feel" the oval shape while pedaling  
• Your pedalling action will feel smoother  
• Helps reduce stress on knees and helping your legs remain fresher for longer 
• You will be able to maintain better cadence while climbing 
• Reduces possibility of leg cramps 
• You will reduce chainring/cog shifts by at least 15%

Important:

• Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T 
• If you wish to use other configuration it will also work, but shifting will be slower and may require more "adjustments" of front dérailleur to be acceptable. Also remember that front dérailleur can only accept max 16T difference between 2 chainrings - this is how Shimano and Sram designed them.
• Absolute Black always recommends using a new chain when fitting new chainrings

How to mount 110/4 9100 / 8000 Oval Chainring: (Same instruction as for 9000/6800/5800/4700 Cranks)

First, you need to remove your crank from your bike. Once removed, unscrew the 4 bolts that hold two chainrings together with a T-30 torx key. Remove both original rings. Locate the new oval inner chainring with the triangular timing indicator positioned behind crank arm. The bolt holes on the small chainring are recessed – so the nut heads will sit flush with the surface of the chainring - these recesses should face you when mounting the bolts. Absolute Black outer chainring has a specific shape of mounting tabs so it will only fit one way on the crank arm. If you are only switching the inner chainring to oval - use the original bolts that came with your crank. If you are switching to a pair of oval rings, you will need a set of regular ‘double’ chainring bolts or our set of Bolt covers. Tighten all four bolts with force of about 5-7Nm. Mount your crank back to the bike. You may also need to adjust the front derailleur slightly.

Key Features

• Compatibility: Shimano Dura-Ace 9100, Ultegra R8000, and 105 R7000 cranksets

• BCD Standard: 110/4 Bolt Circle Diameter

• Chainring Sizes: 50T / 52T / 53T

• Speed Compatibility: 10 and 11 speed drivetrains

• Oval Design: Special patented oval shape improves pedaling efficiency

• Shifting Technology: Absolute Black 6-point ramp and recess shifting system

• Stiffness: Over 15% stiffer compared to Rotor Q-Rings

• Pedaling Feel: Smooth and natural pedaling without noticeable oval sensation

• Climbing Efficiency: Helps maintain better cadence on climbs

• Rider Comfort: Reduces knee stress and fatigue during long rides

Product Specifications

• Product Type: Road Bike Oval Chainring

• Material: High-quality CNC machined aluminum

• BCD: 110mm / 4-bolt

• Construction Thickness: 5mm

• Chain Compatibility: 10 / 11 speed chains

• Finish: Black anodized

• Mounting Type: Shimano 4-bolt road crank interface

• Weight Ratio: Optimized strength-to-weight performance

• Compatibility Range: Shimano Dura-Ace 9100, Ultegra R8000, 105 R7000 (Retrofits with DA9000, Ultegra 6800, 105 5800, Tiagra 4700)

Performance & Pedaling Efficiency

The oval shape of the chainring is specifically designed to maximize power output during the strongest part of the pedal stroke while reducing resistance during weaker phases. This improves pedaling efficiency and helps riders maintain smoother cadence. The design also reduces unnecessary chainring shifts by approximately 15%, making gear transitions more efficient. Riders often experience less muscle fatigue, fewer leg cramps, and reduced knee strain during long climbs or endurance rides. The thicker 5mm construction further increases stiffness, ensuring optimal power transfer from the rider to the drivetrain.

Easy Operation / Usage

• Step 1: Remove the crankset from the bike.

• Step 2: Use a T-30 Torx key to remove the four chainring bolts.

• Step 3: Remove the original chainrings from the crank.

• Step 4: Position the oval inner chainring with the triangular timing indicator behind the crank arm.

• Step 5: Ensure recessed bolt holes face outward so the bolt heads sit flush.

• Step 6: Install the outer oval chainring, which fits only in one correct orientation.

• Step 7: Tighten the bolts to 5–7 Nm torque.

• Step 8: Reinstall the crankset and make small adjustments to the front derailleur if required.

Why Choose This Product

• Improves climbing efficiency and pedaling smoothness

• Premium CNC machined construction for long-lasting durability

• Advanced shifting ramps ensure precise gear transitions

• Helps reduce knee strain and muscle fatigue during long rides

• Enhances cadence consistency for better performance

• Engineered specifically for modern Shimano road cranksets

In the Box

• Absolute Black Oval Road Chainring 2X (Selected Size)