Description Shimano's Dura-Ace Di2, a technologically advanced, electronic shifting option for the all new 7900 series Dura-Ace. Comprised of Dual Control type shift / brake levers, front derailleur, rear deraill...
Summary: Its probably just me but this groupo took my bikes soul... It went from being a beautiful mechanical machine to an electronic gadget in the space of the few hours it took to install. It works well enough nothing though nothing significantly better than my existing dura ace though.
Strengths: really its not worth it keep your integrity,
Weaknesses: It turns a bike into an ipod, i hope UCI bans this before it goes to far
Similar Products Used: Dura Ace
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Summary: WOW! Whatever your expectation about how electronic shifting will change your riding experience...the reality is better! Shifts are effortless...front and rear. It's a mouseclick. The front derailleur now shifts as easily as the rear. Adjustments are a thing of the past. You need to ride it to understand the impact the system will have on your riding.
Shimano got it right.
Strengths: Accuracy...weight...smoothness...ease of use
Weaknesses: price
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