Un articolo in internet riporta:
6870 Weight
For the weight weenies out there, 6870 comes in a 69g lighter than the previous 6770 version using the external battery. Switching to an internal battery shaves an additional 57g to a full savings of 126g from 6770. In fact
Shimano says an
internal battery equipped 6870 groupset comes out 9g lighter than its mechanical sibling (2368g versus
2359g).
Un altro sito però per il meccanico dice (scausate ma la tabella s'è sbindata):
Crankset636
694
834
BB Cups 67
76
102
Shift Lever
363
419
492
Rear Derailleur 160
193
232
Front Derailleur 67
86
112
Chain248
260
291
Cassette163
226 (11-25)
205
Brake Calipers294
340
356
Group Weight in g 1998
2294
2624
Fairwheelbikes infine:
Sram Red22, 2075.5grams
2012 Sram Red, 2124.5 grams
2012 Campag Super Record, 2163.9 grams
2013 Campag 80th Anniversary, 2175.4 grams
Shimano 9070 Di2, 2212 grams
Shimano 9000, 2244.1 grams
2012 Campag Record, 2272.70 grams
Shimano 7900, 2277 grams
Campag Super Record EPS, 2327.2
Shimano 7970 10 spd Di2, 2350.6 grams
Campagnolo Chorus, 2352 grams
Campagnolo Record EPS, 2422.8 grams
2012 Sram Force, 2459.7 grams
Shimano 6770 Ultegra Di2, 2459.7