The Shimano Ultegra BR-R8070 + Di2 ST-R8070 disc brake set disc brake delivers maximum control under even the most challenging conditions thanks to highly-advanced and reliable Ice Technology braking. The brake calipers (2 ceramic pistons each), with their elegant flat mount design, are harmoniously integrated with your bike’s design, making one-way bleeding seamless and easy. Electronic STI shift/brake levers enhance brake safety and allows for intuitive shifting, thanks to a clear delineation between the shift buttons. A reduced hood circumference improves overall ergonomics and comfort. The E-Tube platform offers multiple programming options.