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). 10/11/12spd compatible.
Advantages of absoluteBlack Road Oval Chainrings:
How to mount 110/4 9100 / 8000 Oval Chainring: (Same instruction as for 9000/6800 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.
WORLD'S BEST OVAL CHAINRINGS THAT HELP YOU INCREASE YOUR PERFORMANCE BY UP TO 9%*
absoluteBLACK is the largest mountain bike oval chainring manufacturer in the World with years of expertise in this field. We produce the highest quality, beautifully designed and engineered oval chainrings on the market with impeccable attention to detail.
Our studies led by the University of Primorska, Slovenia show significant differences when using absoluteBLACK Oval chainrings compared to round. Up to 9% increase of Force effectiveness, up to 7% less oxygen consumption, up to 15% less Ventilation (breathing) and up to 10% heart rate decrease when using oval chainrings versus round. What does that mean? In short, it means that you will consume less energy at the same power output using Oval chainrings so you can ride for longer and/or faster.
Why AbsoluteBLACK oval chainrings work?
AbsoluteBLACK oval chainrings deliver power more smoothly to your rear wheel. You will actually feel your pedal stroke to be more "round" with an Oval chainring than with a round chainring. This means you are better able to generate and maintain constant cadence. Because oval chainrings reduce the peak loads on knee joints.