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 Dura-Ace 7970 Di2 Delivers the Most Precise Road Shifting Ever While Remaining Lightweight Shimano officially announced 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 derailleur, and a battery pack, the new Dura-Ace Di2 7970 components provide precision electronic performance and integrate seamlessly with components from the 7900 series Dura-Ace group while adding only 68 grams to the entire group. Electrically actuated shifting significantly eliminates issues associated with cable friction and contamination because the derailleurs respond to electrical impulses that are delivered in fractions of a second. The shifters are now merely switches which also allows for creative placement of optional remote shifters while also reducing the weight and profile of the main shift units. Derailleur movement is precisely controlled through computer automated movement and servo motors creating perfectly synchronized and calibrated shifts every time. |
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 Dura-Ace 7900  €1295-STI Dual Control Carbon Levers Crankset - Aerodynamic 53-42t 52-39t (standard) 50-34t(compact) Front Deraileur Rear Deraileur - Carbon Brakes- Dual Pivot Calipers Cassette - Superlightweight Alu Carrier 4 Titanium Sprockets Chain - 10 Speed |
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 Ultegra SL STI Dual Control Levers - Short Reach Ergonomic ULTEGRA SL Hollowtech II - Front Cranksets are offered in double, triple and compact versions. Front Deraileur - Double or Triple / Clamp or Braze On Rear Deraileur - Wide Link Design Brakes - Dual Pivot Calipers Cassette - 10 Speed Sprockets Chain - Super Narrow 10 Speed |
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 Shimano 105 STI Dual Control Levers - short-stroke ergonomic design 105 Hollowtech II - Front Cranksets are offered in Double, Triple and Compact versions. Front Deraileur - Double or Triple / Clamp or Braze On Rear Deraileur - Wide Link Design Brakes - Dual Pivot Calipers Cassette - 10 Speed Sprockets Chain - Super Narrow 10 Speed |
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 Tiagra 9 Speed Dual Control Levers - Reach adjustable with Optical Gear Display. TIAGRA 2-Piece Front Cranksets - Offered in Double, Triple and Compact versions. Front Deraileur - Double or Triple / Clamp or Braze On Rear Deraileur - Wide Link Design Brakes - Dual Pivot Calipers Cassette - 9 Speed HyperGlide Sprockets Chain - Super Narrow 9 Speed |
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Flat Handlebar 10/9/8 speed Shift Levers - SL EZ Fire Plus 10/9/8 Speed Front Deraileur - 10/9/8 Speed Brake Lever - Caliper and V-Brake Compatible |
| 2009 Kilgrews Cycle Centre, Cork | |
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