Shimano Dura-Ace BR-R9270 Brake Calipers (front & rear).Shimano Dura-Ace ST-R9270 Shifters (front & rear).A new funnel and spacer for bleeding the caliper help optimise the bleeding process.

It is possible to bleed the brake without removing the caliper from the frame, thanks to a separate bleed port and rotary valve. Maintenance of the brakes has been simplified. The frontal area has been reduced by 33%, is 96 grams lighter and is suitable for chainrings from 50T to 54T. The front derailleur is more compact and lighter. Even under heavy load, it shifts smoothly. The front derailleur shifts incredibly smooth and fast much faster than its predecessor. The cassettes come with the HG mounting pattern, which is also compatible with all Shimano HG 11 speed bodies. 12 speed makes it possible to keep the cogs that are most comfortable to ride at medium speeds despite large ratio differences. These ratios all feature the 'sweet spots', on the 6th, 7th and 8th sprockets. Hyperglide cassettes are available in different ratios. This maintains the torque Shimano brakes are known for, but greatly improves the brake delivery. This technology means that the speed at which the pistons move in decreases as the pistons get closer to the disc. The brakes use Shimano's Servo Wave Action. The synchronized shift or semi-synchronized shift, in which the front derailleur automatically shifts to ensure the ideal chainline, also makes a return in this groupset. The function of the shift buttons is individually adjustable. It also eliminates the need for a junction box, allowing you to set up and charge the groupset via the rear derailleur.Īll adjustment options, such as assigning shift buttons, shifting way or adjusting shifting speed, can be done through the Shimano DI2 app. The shifters both contain a button cell battery that lasts about 1.5 years before needing to be replaced.

A fully charged battery will last for about 1000 kilometres before you need to recharge it. The Shimano Dura Ace 9200 DI2 Disc 12 speed groupset is a semi-wireless groupset, meaning there is only a cable connection between the front derailleur, rear derailleur and battery. The maximum heat tolerance before deformation can take place has been improved by 66%. Braking power and dosage have also been noticeably improved. Nothing is more annoying than a brake disc catching up during a climb or a sprint. This has ensured that the brakes do not, or hardly, rub when you are not braking. There is 10% more space between the brake pads and the brake discs. The Dura Ace caliper is a one-piece CNC machined caliper. The groupset can also be set up and recharged via the rear derailleur. The junction box is integrated in the rear derailleur, saving you a lot of space on the handlebars and bottom bracket. The shifting speed under load is also very impressive. The front derailleur shifts 45% faster than Shimano Dura Ace R9150 derailleurs. The shifting speed of the Shimano Dura Ace R9250 12 speed rear derailleur has increased by 58%. This makes it easier to operate the buttons correctly even with gloves or in the cold. The height of the DI2 buttons has also been increased by 1.5 mm, for the up and down shift. The stroke of the brake levers is adjustable. It is also easier to adopt different hand positions. The shifter covers have been optimised for grip, and it is easier to shift between different hand positions. The ergonomics of the shifters have been further optimised with feedback from riders on various professional cycling teams. Heat tolerance has also been increased, reducing the likelihood of annoying noise on descents. As a result, the brake discs are less likely to rub against the car under all conditions. The space between the brake discs and the brake pads has been increased by 10%. The braking system has also been improved.

The shifting performance is unparalleled, even under load. An eye-catching cut-out prevents superficial wear on the crank and gives more freedom of movement with the shoes. The all-black Shimano Dura Ace 9200 crankset immediately catches the eye. The Shimano Dura Ace 9200 DI2 Disc 12 speed semi-wireless groupset is a reality! At first glance, the Shimano Dura Ace R9200 Di2 Disc group looks even better than its predecessor.

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