Di2 Dura Ace unveiled for time trial and triathlon bikes

By BikeRadar | Friday, October 10, 2008 11.26am

If you thought that Shimano were done making waves with their electronic shifting technology this year – you’d be wrong. Today they’ve announced a new variation on their Di2 electronic shifting groupset, specifically designed to up the game of time trial and triathlon riders.

The ST-7971 Dual Control levers eliminate the need to change hand position for gear changes by mounting a pair of integrated gear-shifting buttons in the hood of the brake. This set up means you’ll never have to hop between the extensions and bar-base when cornering or climbing again – saving time and allowing for better race focus. They also include carbon brake lever blades and barely tip the scales at 127g per pair.

The extensions aren’t forgotten either, receiving the SW-7971 satellite switches. These are designed to be easy to integrate into existing bars and the shift wires can be run through inside the extensions for maximum aerodynamic gain. They come in at a svelte 103g per pair.

Both shifters are compatible with the FD-7970 and RD-7970 front and rear derailleurs and are expected to hit the market three months after the release of the 7970 series in January.

Will you be picking up a set?

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