The new Shimano group 105 Di2 Finally released
40 years after his initial release, Shimano 105 receives the final update with a move to electronic change technology Di2. The highly anticipated Shimano 105 R7100 group now includes the change of Di2, a larger 12-speed box and other high-end touches that are triggered from Dura-Ace and Ultegra.
From the first driving of the original Di2 units in the early 2000s as a cycling coach, this update is a welcome addition to the more budget conscious cyclist!
Shimano 105 R7100 Di2 Highlights:
- Cost for the entire group reaches $1900 (approximately $400 more than Msm Rival AXS)
- Weight at 3086 grams (less than SRAM Rival)
- 2 x 12 speed with disk brake only
- 50-34 and 52-36 Cranksets
- 11-34 and 11-36 Cassettes
- Wireless changes
- Addition of Carbon 105-level wheels
Similar to the latest Dura-Ace and Ultegra groups, 105 Di2 gets a 12 team, semi-wise design and updated ergonomics. Brakes also get a more quiet update with 10% more pad cleaning and an easier bleeding process that no longer requires you to remove the brake heater from the frame.
The R7100 group also sees the addition of the 11-36 cassette giving a wide range making the group more attractive to the crowd of gravel and those in mountainous environments. You can also opt for an 11-34 cassette but no matter what you choose to still fit a 11-speed free center body. The 34-ton cassette will be the first available, with 36-tooth entering stock later this year.
A feature in which the new group is lost is the Hyperglide+ in the cassette and the chain that helped improve the change of the cassette. Although this will probably not be noticeable to most, unless it comes from a high-end train, it is worth mentioning.
Features of R7100
Like their most expensive family members, the 105 Di2 group will have the same wireless cabin as the communities with the front and rear diverter connected to an internal battery. This will help keep your cables to a minimum and create a clean look. Notable lack is the ability to run the fully wired system for those who still have concerns about wireless. The changers have a claimed battery life of 3 years using two stacks of coins.
It also gets better brakes with improved performance claimed. The most significant changes that cyclists and mechanics will enjoy are the best cleaning for rotors and the elimination of the need to disconnect the caliper to bleed it.
The updated set also sees Dura-Ace style issues. From now on, you can only get the crank in a 50-34 configuration but look for a 52-36 to enter the market later this year. The front derailleur is also much larger than Dura-Ace and Ultegra. It is closer to the size of the original Di2 pieces of past years. You can also change any part of Di2 as they are all compatible, apart from the 36th booth that is above the limits of the Ultegra and Dura-Ace rear derailleurs.
So what makes the 105 different from the emblematic groups of Shimano Dura-Ace and Ultegra Di2 of the second level?
First, he’s heavier than his brothers. According to Shimano, the entire group indicates the scales to a touch exceeding 3086 grams, including wires and battery. That makes 500 grams heavier than Dura-Ace and nearly 360 grams on Ultegra.
Both groups are considerably more expensive so a better comparison is with the SRAM Rival AXS controller that comes in 160 grams heavier than the group 105. It should also be noted that the Rival driving train comes cheaper for about $400, though.
Concluding thoughts in Shimano 105 Di2
Like most, we haven’t had the opportunity to try the new group yet and point to the main topic. The real problem with the new group 105 will be availability. His most expensive brothers were released almost a year ago and are still very difficult to get their hands. They’re saying expected availability this summer, but we’ll see.