Shimano Dura Ace R9200 Chainring 54 Teeth NJ - Black

With their special tooth profiles, mounting pins and climbing aids, the Dura Ace FC-R9200 chainrings enable a particularly smooth and fast shifting process.
This makes shifting under load, as you are otherwise only used to with a rear derailleur, possible without any problems.
The carbon fiber reinforced plastic construction with aluminum teeth helps keep weight down and increase torsional rigidity.
The Hollowglide profile of the large chainrings also contributes to this.

NB:
The letter combinations (NK, NH, NJ) behind the number of teeth must match for large and small chainrings.
Specially matched thanks to their climbing aids, the Dura Ace FC-R9200 chainrings can only achieve their superior shifting performance in Shimano's combinations.

Specifications:
Brand: Shimano
Model: Dura Ace R9200
Use: Road, triathlon
Material: Aluminum, carbon fiber reinforced plastic
Technology: Hollowglide
BCD: 110mm asymmetric
Mounting: 4-armed spider asymmetrical
Number of teeth (combinability index): 54 (NJ)
Crank compatibility: Shimano Dura Ace FC-R9200
Compatibility chain: Shimano HG+ 12-speed
Mounting: Outer
Chainline: 44.5 mm
Offset: Default
Color: Black