eRockit electric bicycle that reach 80km/h

The current trend is definitively toward making electric bicycles as the popular thema is to "save the planet" with green vehicules.

 Today subject is about what is the most advanced electric bicycle in the world.

Shimano RD-6770 Ultegra Di2 Rear Derailleur Compatibility and Specifications

Shimano Ultegra Di2 RD-6770 Rear Derailleur 10 speed 2012 Series Model.

Like the Dura Ace series, the 6770 has a new design is compatible with wider range cog sets, accommodating up to a 27 tooth cog. The unit is driven by a servo motor instead of a cable and spring, so shifts are identical and precise every time as the computer control unit analyzes each shift.

*Prototype pictured
The derailleur has a built in mechanism that will allow the body to move inward under impact to reduce the potential for damage in the case of a crash. Cycling through the shifting a couple of times allows the shifter and rear derailleur to automatically re-synchronize.

Di2 - Digital Integrated Intelligence - electronic shifting
Programmed motion
Outer Plate: Aluminum/Anodized
Inner Plate: Aluminum/Anodized
Estimated weight 289 grams
10 speed compatible
Double Compatible

Note: DOES NOT works with 11-28 cassette.

Compatible ONLY with Shimano following parts: ST-6770, ST-7970, ST-7971, SW-7971, SW-7972

Compatible with Shimano 10 speed cassettes: CS-7900 (not 11/28), CS-7800, CS-6700, CS-6600, CS-5700, CS-5600. (does Not work with 11/28)

Compatible with Shimano Chains: CN-7900, CN-7901, CN-6700, CN-6701, CN-6600, CN-5700, CN-5701, CN-5600.

Require to be used with Shimano; SM-BTR1, EW-7970, Double setting SM-EW79F-E (with SC-7900) or SM-EW79A-E or Time Trial setting SM-EW-79F-I (with SC-7900) or SM-EW79A-I.

Shimano Ultegra Di2 ST-6770 Dual Control Levers Compatibility and Specifications

Shimano Di2 ST-6770 Ultegra Electric Dual Control Levers 2012 model series.

By eliminating all of the mechanical shifter parts, the new Dual Control lever weight is reduced by over 100g over the mechanical version. The ergonomics are slimmed down and further refined for a comfortable grip.

The wiring harness for the shifters is designed to accept the all new FlightDeck computer (SC-7900) featuring heart rate, altitude, grade, cadence, estimated caloric consumption, gear position, and battery life all directly downloadable data via a wireless connection.

Di2 - Digital Integrated Intelligence - shifting
Steel fixing band and bolt
Aluminium brake lever blade
Flight deck compatible
Adjustable reach
Optional satellite switch
Clamp 23.8-24.2mm bar diameter
Published weight 350 grams (pair)
10 speed compatible
Double Compatible

Japan Retail release Autumn 2011

Compatible ONLY with Shimano following parts: RD-7970, RD-6770, FD-7970, FD-6770 derailleurs.

Compatible with all 10 speed Shimano crankset.

Compatible with Shimano Brake Calipers: BR-7900, BR-7800, BR-6700, BR-6600-S/-G, BR-5700, BR-5600-S/-L,

Require to be used with Shimano; SM-BTR1, EW-7970, Double setting wires SM-EW79F-E (with SC-7900) or SM-EW79A-E, SW-7970, SW-7972.

Shimano DI2 ST-7971 Tri/TT Shifters Compatibility and Specifications

Shimano DI2 ST-7971 Tri/TT Shifters

Di2 - Digital Integrated Intelligence - electronic shifting

Published weight 116 grams (pair)
10 speed compatible
Double and Compact Compatible

Japan Retail price 39.421 yen (see cross rate here)

Compatible ONLY with Shimano following parts: RD-7970 and FD-7970

Compatible with Brake Calipers: BR-7900, BR-7800, BR-6700, BR-6600-S/-G, BR-5700, BR-5600.

Require to be used with Shimano; SM-BTR1, EW-7970, SM-EW-79F-I (with SC-7900) or SM-EW79A-I.