Shimano just re-released its workingman’s 105 group as a completely revamped 2 x 12-speed electronic drivetrain. Here are some quick thoughts on Shimano 105 Di2 and a rundown of pricing and weights…
Celebrating the 40th anniversary of its introduction in 1982, Shimano 105 just got a complete upgrade with a move to Di2 electronic shifting. The Shimano 105 R7100 group gets trickle-down technology from Shimano’s flagship 12-speed, wireless shifting in a more attainable package. We realize this isn’t geared toward most of our readers, with relatively high road-oriented ratios. However, it’s an interesting release that will hopefully pave the way for more 12-speed wireless offerings from Shimano. Find the pricing and a few details below.
The new Shimano 105 Di2 group has the same “wireless where it matters” wire-free cockpit and wired derailleurs attached to the seatpost’s internal battery. Here are the quick specs on each component, followed by weights and prices:
– Wireless Di2 connectivity
– 2×12-speed Dual-Control lever
– Refined hood for improved ergonomics and aerodynamics
– Improved button access
FC-R7100 Crank
– HOLLOWTECH II Crank Set
– 2×12-speed
– Chainrings: 50-34T or 52-36T
CS-R7100 Cassette
– 12-speed
– 11-tooth small cog for efficiency
– Optimized “Sweet Spot” Gears
– Compatible w/ 11-spd freehub bodies
– 11-34T
– 12-speed
– 11-tooth small cog for efficiency
– Compatible w/ 11-spd freehub bodies
– 11-36T, available at a later date
RD-R7150 Rear Derailleur
– SHIMANO SHADOW Rear Derailleur
– Integrated D-FLY connectivity
– 12-speed Di2 technology
– For 11-34 and 11-36T cassettes
FD-R7150 Front Derailleur
– 12-speed Di2 technology
– Fast, precise front shifting
Component | Price | Grams |
---|---|---|
Di2 Battery (BT-DN300) | $185 | 53 |
Wire (EW-SD300) | $28 | 7 |
Wire (EW-SD300) | $28 | 7 |
105 Cranksets with Chainrings (FC-R7100) | $180 | 765 |
SM-BBR60 BOTTOM BRACKET (SM-BBR60) | $32 | 77 |
105 Cassette (11-34) (CS-R7100) | $66 | 361 |
105 Di2 Front Derailleur (FD-R7150) | $153 | 142 |
105 Di2 Rear Derailleur (RD-R7150) | $280 | 302 |
12-Speed Chain (CN-M7100) | $33 | 252 |
(2) Disc Brake Rotor, 160mm (SM-RT70) | $92 | 285 |
105 Hydraulic Disc Front Brake Set | $405 | 407 |
105 Hydraulic Disc Rear Brake Set | $405 | 407 |
TOTAL | $1,887 | 3068 |
Find more information on the Shimano 105 Di2 drivetrain over at Bike.Shimano.com.
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