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Shimano Shimano Dura-Ace 7900 Di2 (Groupset)
General
| Product Category | |
|---|---|
| Brand | Shimano |
| Model | Shimano Dura-Ace 7900 Di2 (Groupset) |
| Color | Black / Carbon |
| Bottom bracket | Dura-Ace Hollowtech II Bottom Bracket/SM-BB7900 |
|---|---|
| Brake levers | Dura-Ace Di2 Shift/Brake Lever for Road/ST-7970 |
| Brakes | Dura-Ace Dual-Pivot Brake Caliper/BR-7900 |
| Cassette | Dura-Ace Cassette/CS-7900 |
| Chain | Dura-Ace 10-Speed Chain/CN-7900 |
| Crankset | Dura-Ace Hollowtech II Double Crankset/FC-7900 |
| Features | Crankset - This sleek aerodynamic Dura-Ace Hollowtech II crankset features significant weight saving and increased rigidity through the use of a 20% stiffer chainring, resulting in optimal shifting & power transfer. Brakes - The Dura-Ace 7900 brakes present a new, durable shoe compound that produces 210% the stopping power in wet condition, 120% in dry conditions and 50% longer wear. Cassette - Featuring four titanium cogs, the new Dura-Ace 7900 cogset has further improved shifting quality by creating a more rigid aluminum carrier unit along with a re-engineered tooth profile. Shimano also successfully reduced the weight of the rear wheel assembly by 10 grams. Chain - The asymmetric design of the 10-speed Dura-Ace chain improves shifting precision and smoothness due to different inner and outer plate chamfers and dimensions. While still saving weight without giving up strength, this chain offers higher durability, silent pedaling, and reduced chain drop even under intense pressure. Wheelset - Shimano Dura-Ace wheels are designed to balance key design elements to deliver the best riding wheels for intended design use. Through a balanced design of dependability - stiffness vs. compliance - torsional & lateral rigidity - aerodynamics - weight, the best riding wheelsets in six purpose driven wheel designs. Pedals - DURA-ACE SPD-SL Pedals are designed to provide optimum stability and efficiency so you can focus on the road. Bottom Bracket - The Dura-Ace Hollowtech II bottom bracket offers a wider bearing space for superior stability and an improved seal design for longer durability. Hubs - Digital click adjust for better rotation performance. Enhanced rigidity toward the compression direction for better rotation even when quick release is on tight. Shifters - Dura-Ace DI2 takes Shimano shifting performance to a whole new level with SEIS (Shimano Electronic Intelligent System). In addition to uni-directional carbon fiber levers, the electronic shifters are ultra lightweight. Rear Derailleur - Through SEIS, the electronic rear derailleur is the fastest & most precise shifting available for the road. In addition, the carbon pulley plate is lightweight and rigid while adding a dash of style. Front Derailleur - The front derailleur contains the shifting logic and enables the shifters to stay in constant communication with the whole system. Front shifting is the most perfect front shift available today. With automatic micro-trim adjustments, the chain is kept perfectly aligned and quiet. |
| Front derailleur | Dura-Ace Front Derailleur/FD-7970-F |
| Hub front | Dura-Ace Front Hub/HB-7900 |
| Hub rear | Dura-Ace Rear Hub/FH-7900 |
| Pedals | Dura-Ace SPD-SL Pedal/PD-7810 |
| Rear derailleur | Dura-Ace Di2 Rear Derailleur/RD-7970 |
| Recommended for | Road racing |
| Shifters | Dura-Ace Di2 Shift/Brake Lever for Road/ST-7970 |
| Skewers | Shimano |
| Spokes | Shimano |
