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R9100 R8000
230 295 Rim brake & Di2 shift (+65g R9150 vs R8050)
365 438 Rim brake & Cable shift (+73g R9100 vs R8000) (365-230=135, 438-295=143)
360 360 Disc brake & Di2 shift (+ 0g R9170 vs R8070) (360-230=130, 360-295= 65)
505 550 Disc brake & Cable shift (+45g R9120 vs R8020) (505-230=275, 550-295=255)
360g seems odd from marketing and technical PoV
Ultegra uses Aluminum lever vs Carbon lever on Dura-Ace
Considering other weight numbers, 2×ST-R8070 may be ≈ 430g
https://www.facebook.com/shimanoroad/vi ... 855773724/
Shimano rep answering some questions here ^^^
Shimano-Road wrote:R8000 = June
R8070 = August
R8050 = August
Shimano-Road wrote:There isn't a powermeter in this version available
Shimano-Road wrote:What is the difference in weight compared to the new Dura Ace R9100. Let's say a full groupset (mechanical)
Weight difference is about 310 grams.
Shimano-Road wrote:R8000 is 43gr heavier than 6800
R8050 is 11gr heavier than 6870