With Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear. The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts. Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold. TT / Triathlon single button bar end shift switches are used to operate both front and rear derailleur's with synchronized shifting. Can be used on there own or in conjunction with STI. TT / Triathlon bar end...
Best Price: £149.99 from Merlin Cycles