Shimano Ultegra Rear R8 Direct Anchor Tirante Rim Brake

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Shimano Ultegra Rear R8 Direct Anchor Tirante Rim Brake

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(*) The Shimano Ultegra Rear R8 Direct Anchor Tirante Rim Brake offer high-level performance at an affordable price.

SHIMANO TRANSFERS THE HIGHEST ROAD TECHNOLOGY TO THE ULTEGRA GROUP
The new Ultegra R8000 offers: the most powerful and controlled braking thanks to its new disc brakes, new mechanical ergonomic handles and Di2, new Di2 pushbuttons for the upper part of the levers, offering more customization options, new triathlon and time trial levers and a new low-profile "Shadow" change to improve aerodynamics.
The launch of the new Ultegra R8000 offers much more than a group tested by professionals. This new group brings to the world of "real" racers the technologies used by professional teams and riders, offering new customizable options, improved ergonomics, an improved disc and rim braking system, and multiple mechanical and mechanical change options. Di2.
Designed for both competition and training or outings of grupeta and friends, the new Ultegra allows you to once again enjoy all the passion of cycling.

ULTEGRA R8000 TRANSMISSION
A new redesigned crank arm, which inherits the concept of the Dura-Ace 9100, and incorporates a 4-arm structure Hollowtech II for greater rigidity and greater power transfer, also lowering a couple of grams the final weight (674g, 50 -34) with respect to the current design (676g).
This redesign affects the position of the connecting rod relative to the cassette, increasing the distance between the frame and the teeth, which improves the performance of the change in the bikes with disc brake.
The tooth profile of the plates incorporates hollow structure Shimano Hollowglide technology, to reduce weight and improve rigidity, achieving a more precise front change.
The crank options include 53-39, 52-36, 50-34, and the CX-specific 46-36.
The 11-speed cassette comes in 6 standard options (CS-R8000, 11-25, 11-28, 11-30, 11-32, 12-25, 14-28) and a wider option 11-34 (CS- HG800) with a hub body designed for both road bikes (with spacer) and mountain bikes.
The new Ultegra SPD-SL carbon pedals allow to improve the pedaling performance, reducing the height in 0,7mm and improving the effect on the cranks, as well as reducing the final weight in 12g with respect to the previous PD-6800 (the weight now it is 248g). Pedal options are completed with longer 4mm axles.

ULTEGRA R8000 EXCHANGE SYSTEMS
Ultegra offers a wide variety of quick, smooth and precise changes, both Di2 and mechanical, as well as options for hydraulic and rim disc brakes, with handles and push buttons designed to the millimeter ergonomically.
The new Di2 handles can work both in full and semi Syncro-Shift mode (always with the new battery BT-DN110), so the system automatically corrects the rear change when changing plates (semi mode) or choose the best combination according to we request the change more or less development (full mode). As usual, customizations on E-Tube are almost endless, covering any type of need. In addition, the push-buttons have a better touch and a more defined change sensation, offering a faster and more precise change even with winter gloves.

Following the design of the "secret" Dura-Ace Di2 pushbuttons, the new Ultegra ST-R8070 Di2 handles for hydraulic disc brakes and the ST-R8050 Di2 for rim brakes, also include the option of remote pushbuttons for remote change, which They can be programmed both to change gear and to control other devices such as GPS, computers or compatible lights.
All the handles and push buttons can be customized from the E-TUBE application for mobile devices (IOS and / or Android), tablets or PCs. This application not only allows you to customize functions and operations as you want, you can also always update the latest version of the firmware of the components, as well as checking for errors and detecting problems in the system.
The ST-R8070 hydraulic handles are updated from the previous R785 "non series" with a larger handle stroke and adjustment option. The new hydraulic levers (ST-R8070 and ST-R8020) weigh 360g and 550g respectively, 65g and 112g less than their equivalent for rim brakes (ST-R8050, 295g, and ST-R8000, 438g).
The diverter (FD) has been designed to achieve a quick and smooth change even in load situations. In combination with the new connecting rods, the derailleur works in a wider range of gears without sacrificing effectiveness in it.
The change Di2 (RD-8050) or mechanical (RD-R8000) adopts the low profile of the Shimano Shadow Dura-Ace change, to fit perfectly under the cassette, free of any danger. The change is available in short box (SS) to cover developments 11-25 to 11-30, and long box (GS) to cover from 11-28 to 11-34. Both the change and the Di2 derailleur communicate perfectly with each other to operate in full or semi Synchro-Shift mode, allowing the user to concentrate on the most important thing: the road and pedaling.
The mechanical shift levers are available in hydraulic disc brake (ST-R8020) or rim brake (ST-R8000) versions, including polymer cables for an incredibly smooth shifting action.
The design is completed with an in-line cable tensioner, and allows an easy, precise and accurate adjustment through allen key.

ULTEGRA R8000 AUXILIARY PUSH BUTTONS
For triathlon and time trial, the new Ultegra incorporates a pair of ST-8060 dual control handles for aero bars and handlebar extensions, allowing braking and changing from this position. This opens a new dimension to time trialists and triathletes, simplifying their operation of change when they are at the moment of maximum effort. A change button and a connection with respect to the model ST-6871 has been eliminated, achieving a smaller, shorter and more aerodynamic result.
The effect of removing a button from each lever means that users must use the full Syncho-Shift mode in this position. Thus, there is a single pushbutton on each handle (for example, on the left of the extension bars) to increase development along the entire transmission, and a pushbutton on the other handle (for example on the right) to lower development throughout the entire transmission. Other alternative options are the SW-R671 TT non-series push buttons plus the sprint or climb buttons SW-R600 or SW-R610.

ULTEGRA R8000 BRAKING SYSTEMS
The hydraulic brake options of the new Ultegra include a new direct mount brake caliper BR-R8070, firm and consistent braking, and a slim design to adapt to road geometry. The rotors include ventilation fins that increase the available surface to dissipate the heat. A pair of BR-R8070 calipers weigh 280g, plus 212g of a pair of SM-RT800 rotors, compared to the 360g of the current pair of BR-R8000 calipers.
In addition to the dual pivot design, the new Ultegra clamps come in direct mount format. Both options are compatible with tires up to 28c, and have a finer design with less space between the arms. The double pivot option incorporates a stabilizer between the arms, to reduce deformation and improve braking. The direct mount option adapts directly to compatible frames to reduce weight and improve performance.

Other Interesting Links :
Rim brakes Shimano

About the brand SHIMANO

The Shimano cycling products are characterized by their design, specifically created for the sport. The Japanese brand was able to open a gap between practitioners being nowadays one of the most popular cycling Shimano.

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