Shimano Ultegra FC R8000 large road bike chainring

The Shimano Ultegra FC-R8000 large chainring is designed to be installed on FC-R8000 cranksets from the Ultegra R8000 and R8020 groupsets, as well as the Ultegra Di2 R8050 and R8070 groupsets. The large Hollowglide chainring gives the crankset greater rigidity while being lighter and optimises the transfer of power from the rider, from the pedal to the drivetrain.Features: - Teeth: 50 / 52 / 53- Chainring type: External - Centre distance: 110 mm - Speeds: 11- Hollowglide technology - Brand: Shimano - Please note: Shimano recommends the following combinations: 50x34, 52x36, 52x38, 53x39, 54x42 or 55x42; any other combination, such as 53x36 or 52x34, may cause the chain to jump or jam, or even destroy the crankset, which is not covered by the manufacturer's warranty.