absoluteBLACK Oval Road 110/4 Chainring for Shimano Dura-Ace R9100 / Ultegra R8000

The absoluteBLACK Oval Road 110/4 chainring for Shimano Dura-Ace R9100 and other 4-arm cranks

This oval 2-speed chainring by absoluteBLACK was developed for the Shimano Dura-Ace R9100 and Ultegra R8000 road bike cranks, which have four asymmetrically arranged arms and a bolt circle diameter of 110 mm. It also fits the 105 R7000 crank. The chainring is designed for super-fast and smooth shifting. It is made of premium quality aluminium and is characterised by particular rigidity. Thanks to the oval shape, you optimise your pedalling movement, reduce the strain on your knees and move forward faster.

Specifications:

Application:

Road

Mount:

110 mm bolt circle diameter, 4-arm asymmetrical

Teeth:

34 T, 36 T, 38 T, 39 T, 50 T, 52 T, 53 T

Gearing:

2x10-speed, 2x11-speed

Type:

Oval 6.5% (34 T), 11.4% (36/38/39 T), 10 - 11.2% (50/52/53 T)

Technical Information:

Combinations:

34-50 T, 36-52 T, 38-52 T, 39-53 T

Material:

aluminium (7075)

Compatibility:

Crank:

Shimano Dura-Ace R9100 (also R9120, R9150, R9170 groupsets), Ultegra R8000 (also R8020, R8050, R8070 groupsets), 105 R7000 (also R7020, R7070 groupsets), also fits Dura-Ace 9000 and Ultegra 6800

Chain:

10-speed or 11-speed

Note from the manufacturer:

Combinations other than those listed above are also possible, but these slow down the shifting process and require further adjustments to the front derailleur. Please note the maximum permissible difference of 16 teeth.
The 34 T chainring is not compatible with power meters that have a circular spider (e.g. SRAM QUARQ, Power2Max).
Use long bolts or bolt covers for the outer chainring. If you are only replacing the inner chainring, continue to use the original bolts.

Features:

• oval shape for improved traction and performance uphill
• faster, looser riding with a natural pedalling motion with reduced strain on the knees
• ovality and timing (108 - 110.5°) matched to chainring size (TDC technology, Top Dead Center)
• 15% less shifting operations needed
• 5 mm thick and 15% stiffer than comparable chainrings
• 6 shift ramps, 12 downshifting points and design with cutouts for fast, smooth shifting
• excellent weight to stiffness ratio
• durable construction, CNC-machined
• anodised
• premium quality
• " rainbow" version with unique rainbow finish from PVD coating process: each piece is unique due to individual colour gradation
• designed in Great Britain, manufactured in Poland

Technology:

Oval Chainrings
Oval chainrings follow the natural physiology of humans. They maximise pedalling power the moment it is developed and minimise resistance when it is not. As a result, oval chainrings allow the rider to pedal more smoothly and stay loose on the climb.
In fact, your pedal stroke will feel " rounder" with an oval chainring than with a round chainring.
Compared to round chainrings, oval chainrings address more muscle groups - but each of them to a lesser degree. The total load of pedalling is therefore distributed over a larger muscle mass and the knees are less strained.
This has three advantages: 1. The legs remain fresher and more relaxed. 2. You can go uphill faster. 3. Spreading the load over more muscles reduces the susceptibility to cramps, even with great effort. Ultimately this will increase your riding pleasure. For MTB applications, the rear wheel traction is increased on loose and slippery surfaces, allowing you to make better progress on demanding terrain.

Manufacturer Numbers:

black 34 tooth:

ROV9100/34/4BK

black 36 tooth:

ROV9100/36/4BK

black 38 tooth:

ROV9100/38/4BK

black 39 tooth:

ROV9100/39/4BK

black 50 tooth:

ROV9100/50/4BK

black 52 tooth:

ROV9100/52/4BK

black 53 tooth:

ROV9100/53/4BK

grey 50 tooth:

ROV9100/50/4GR

grey 52 tooth:

ROV9100/52/4GR

grey 53 tooth:

ROV9100/53/4GR

rainbow 34 teeth:

ROV91/34/4RB

rainbow 36 teeth:

ROV91/36/4RB

rainbow 39 teeth:

ROV91/39/4RB

rainbow 50 teeth:

ROV91/50/4RB

rainbow 52 teeth:

ROV91/52/4RB

rainbow 53 teeth:

ROV91/53/4RB

Contents:

• 1 x absoluteBLACK Road 110/4 BCD Shimano Dura-Ace R9100 Oval chainring

Order Together:

• Chainring Bolt Covers for Dura-Ace R9100 or
• Chainring Bolt Covers for Ultegra R8000 or
• Chainring Bolt Set for 4-arm