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Shimano Ultegra Di2 ST-R8170 STI brake/shift lever

The ST-R8170 STI levers are not only characterised by their optimised ergonomics and even more precise dosing of the hydraulic disc brakes, but also impress above all with lightning-fast shifting processes, which are achieved not least through the Wireless functionality.

The wireless connection also offers another advantage: without electric cables, installation is easier and the cockpit appears tidier. Nevertheless, the shift/brake levers still offer a cable connection (EW-SD300) for the use of additional shifters in the drops or the top of the handlebar. For numerous customisation and configuration options, compatibility with the improved E-Tube Project app, which, like previous versions, allows you to adjust shift modes (Synchro-/Semi-Synchro-Shift, Multi-Shift), shift speed and button assignment on the fly.

To ensure that the braking performance is in no way inferior to the shifting functionality, the Ultegra Dual Control levers feature Servowave technology. With the help of an extended brake control range, this ensures excellent dosing that offers optimum comfort and control even in challenging conditions. Of course, for individual adjustment, the levers feature the option of reach and free stroke adjustment.

Shimano Ultegra BR-R8170 disc brake caliper

All around improved, the Shimano Ultegra BR-R8170 caliper offers optimised dosing, quieter braking performance and extremely simplified maintenance.

While a faster-gripping initial braking force always gives the feeling of full control, the 10 % increase in brake pad spacing allows for a significant reduction in noise during braking, despite a flatter overall construction. In addition, when the RT-MT900 brake disc rotor (sold separately) is used, its deformation-resistant design, even with increasing heat, helps to create an extremely quiet and smooth braking system.

To simplify maintenance, the hydraulic 2-piston brake caliper not only features the proven One-Way-Bleeding system, but also a separate arrangement of bleed nipple and opening screw. On the one hand, this minimises the risk of the bleed kit hose slipping off when opening or closing the system and, on the other hand, makes it unnecessary to dismantle the caliper from the frame for bleeding process.

Shimano Ultegra Di2 ST-R8170 STI brake/shift lever

The ST-R8170 STI levers are not only characterised by their optimised ergonomics and even more precise dosing of the hydraulic disc brakes, but also impress above all with lightning-fast shifting processes, which are achieved not least through the Wireless functionality.

The wireless connection also offers another advantage: without electric cables, installation is easier and the cockpit appears tidier. Nevertheless, the shift/brake levers still offer a cable connection (EW-SD300) for the use of additional shifters in the drops or the top of the handlebar. For numerous customisation and configuration options, compatibility with the improved E-Tube Project app, which, like previous versions, allows you to adjust shift modes (Synchro-/Semi-Synchro-Shift, Multi-Shift), shift speed and button assignment on the fly.

To ensure that the braking performance is in no way inferior to the shifting functionality, the Ultegra Dual Control levers feature Servowave technology. With the help of an extended brake control range, this ensures excellent dosing that offers optimum comfort and control even in challenging conditions. Of course, for individual adjustment, the levers feature the option of reach and free stroke adjustment.

Shimano Ultegra BR-R8170 disc brake caliper

All around improved, the Shimano Ultegra BR-R8170 caliper offers optimised dosing, quieter braking performance and extremely simplified maintenance.

While a faster-gripping initial braking force always gives the feeling of full control, the 10 % increase in brake pad spacing allows for a significant reduction in noise during braking, despite a flatter overall construction. In addition, when the RT-MT900 brake disc rotor (sold separately) is used, its deformation-resistant design, even with increasing heat, helps to create an extremely quiet and smooth braking system.

To simplify maintenance, the hydraulic 2-piston brake caliper not only features the proven One-Way-Bleeding system, but also a separate arrangement of bleed nipple and opening screw. On the one hand, this minimises the risk of the bleed kit hose slipping off when opening or closing the system and, on the other hand, makes it unnecessary to dismantle the caliper from the frame for bleeding process.

SHIMANO Deore XT Di2 shifters SW-M8250-IR 12-speed | I-SPEC EV

Since the Deore XT groupset revolutionized the mountain bike world in 1980, it has been synonymous with reliability, durability and functionality. Over time, it has been continuously optimized and improved and is still considered a pioneer in the bicycle industry. Nevertheless, Shimano still managed to make a big leap forward with the Di2 M8200 version. Thanks to modern wireless control, perfect performance, a 12-speed drivetrain and the usual outstanding build quality, there are no limits to your cycling dreams and you have a loyal companion for your adventures.

The advantages of electronic shifting are obvious. One push of a button and the chain shifts from one sprocket to another in a fraction of a second, regardless of the situation and without any delays or effort. The high-quality Deore XT shifters with Shimano's Rapid ES technology are also synonymous with precision. The defined pressure points of the rubberized buttons give you the secure feeling of being in control at all times, while their ergonomic arrangement and 3-way adjustment options ensure that you always have a firm grip on the handlebars when shifting.
Communication with the rear derailleur is wireless via Bluetooth®. This eliminates the need for complex cabling and makes mounting on an I-SPEC EV-compatible mount very easy. Of course, the Shimano E-Tube app can be used to personalize the switch assignments. Whether single, multi-shifting or button swapping, the system adapts to your preferences. In addition, another small push button can be used to control a bike computer, for example.


Technical specifications:

Area of application: MTB
Material: Aluminum, plastic
Rear derailleur compatibility: Shimano Deore XT RD-M8250
Technology: Di2 Wireless
Mounting: right, only on I-SPEC EV mount
Power supply: Button cell CR1632
Color: black matt

Weight according to manufacturer: n/a
Weight weighed: 97g


Scope of delivery: 1x SHIMANO Deore XT Di2 shifter SW-M8250-IR 12-speed | I-SPEC EV