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M730 1987 6-speed; M732 1989 7-speed; M735 1992 7-speed; M737 1993 8-speed; M739 1995 8-speed; M750 1999 9-speed (first groupsets sold already in 1998, these sets are code-stamped WK onwards) M760 2003 9-speed; M770 2008 9/10-speed Rear derailleur: introduction of Shadow low-profile design, which reduced the risk of damage from side hazards.
They can be used individually, as an external derailleur or an internal hub gear, or in combinations such as the SRAM Dual Drive, which uses a standard 8 or 9-speed cassette mounted on a three-speed internally geared hub, offering a similar gear range as a bicycle with a cassette and triple chainrings. Derailleur gears. Cogset; Crankset; Hub gear
The rechargeable lithium-ion battery pack supplies power to the derailleur motors, which move the derailleurs via worm gears. Shimano estimates that their 7.4-volt battery pack can last up to 1,000 kilometres (620 mi) per charge. [14] The system also has an LED light to warn when it needs a charge. [15]
The C725 is a 7-speed version developed for engines up to 250 N⋅m (180 lbf⋅ft) of maximum torque and intended only for front-wheel-drive vehicles and transverse engines and is produced in China by the GAC Fiat joint-venture. Three FCA models currently have this transmission as an option, the Fiat Ottimo, the Fiat Viaggio, and the Alfa Romeo ...
A dual-clutch transmission (DCT) (sometimes referred to as a twin-clutch transmission) is a type of multi-speed vehicle transmission system, that uses two separate clutches for odd and even gear sets. [1] The design is often similar to two separate manual transmissions with their respective clutches contained within one housing, and working as ...
7DCT300 – 7-speed dual-wet-clutch – Renault EDC and Mini/BMW Steptronic Doppelkupplung since MY2018 in FWD applications, Ford Puma and Ford Fiesta since MY2020 7DCT400 – 7-speed dual-wet-clutch – Tougher version of the 7DCT300 that can handle up to 400 Nm of torque [12] 7HDT300/ 7HDT400 – 7-speed dual-wet-clutch for hybrid ...
The Ford unit is a six-speed with one clutch acting on reverse, first, third, and fifth gears, and the other used for second, fourth, sixth gears. As the first gear is engaged, the 2-4-6 clutch is disengaged and the second gear cogs are engaged. At the appropriate time, the R-1-3-5 clutch is disengaged and the 2-4-6 clutch is engaged.
Mercedes-AMG developed the 7-speed MCT "Multi Clutch Technology" planetary automatic transmission. The MCT transmission is essentially the 7G-Tronic automatic transmission without a torque converter. Instead of a torque converter, it uses a compact wet startup clutch to launch the car from a stop and also supports computer-controlled double ...
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