Now that Shimano has released a wireless Di2 version of their popular 105 groupset, we thought it would be interesting to take a deep dive into the differences between 105 R7100 Di2 and the latest edition of Shimano’s top-tier groupset, Dura-Ace R9200. There’s a video over on @gcn which compares the two on the road, but this is GCN Tech, so let’s get into the nerdy details here…

Chapters:
00:00 Intro
00:51 The groupsets
01:40 Cranks
03:27 Levers
05:20 Rear mech
06:48 Front mech
08:00 Cassette
08:39 Brakes
11:12 Battery
11:46 Chain
12:25 Price
12:53 Speed difference
13:42 Summary

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