SRAM RED® eTap Rear Derailleur
The SRAM RED® eTap rear derailleur executes shifts the instant you demand it, with military precision. Wirelessly. It’s easy to set up, clean in appearance and delightfully uncomplicated. Mechanical necessities such as a carbon pulley cage, ceramic pulley bearings, and anodized alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder.
- Compatible with SRAM RED® eTap shift/brake controls
- SRAM 11-speed compatible, 28t maximum capacity
- WiFLi™ option fits up to 32t
- SRAM RED® eTap shifting logic
- Wireless connection via AIREA™ network for fast and clean installation
- Exact Actuation™ provides precise gear selections
- Designed to work with SRAM PowerGlide™ and PowerdomeX™ cassettes
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Specifications for SRAM RED® eTap Rear Derailleur
|Weight||239g (short cage with battery)|
|Compatibility||SRAM RED® eTap, PowerdomeX™ & PowerGlide™ Cassettes|
|Cage Sizes||Short, Medium|
|Max Tooth||Short - 28, Medium - 32|
|Technology Highlight(s)||eTap, AIREA™|
Utilizing 128-bit encryption, eTap® shift signals are transmitted and received in accordance with SRAM’s proprietary wireless protocol known as AIREA. Each time an eTap groupset is paired, a new encryption code is generated and assigned to the components in this group to ensure complete shifting security.
All of the underlying tech in our new SRAM RED® eTap groupset such as wireless shifting, advanced battery power management and mechatronics technologies are all meant to serve one ultimate purpose, to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. Right lever makes it harder, left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive.
- EXACT ACTUATION™
When we launched our road technology from scratch we reapplied our MTB proven SRAM 1:1 actuation ratio (shifter cable travel : derailleur movement) for 10 speed rear shifting. EA helps to simplify/stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way.
Documents Available for SRAM RED® eTap Rear Derailleur
"It’s here: SRAM’s wireless electronic system, in development since 2011 and publicly raced by SRAM’s professional teams for over a year, is now officially official. "
Outside bike editor Aaron Gulley tests SRAM's first generation of electronic shifting on the new Pinarello Dogma F8W at the 2016 Outside bike test in Sedona, Arizona.
"... 75g lighter than Shimano Dura-Ace Di2 9070 for comparably configured setups."
"At the risk of stating the obvious, it is worth noting that, unlike Shimano and [Campagnolo’s] electronic system, there are no wires connecting the shifters to the derailleurs and a battery. This speeds up the installation process tremendously and results in a cleaner build."
"Wires? It’s 2016, only your table lamp needs wires."
"The learning curve is short and shallow, showing eTap not only simplifies things for riders at the bars and frame manufacturers in design and production, but for mechanics too."
“SRAM Red eTap is an excellent groupset that is the match of any other groupset on the market. It’s an absolute doddle to install and set up, and once it’s in place provides excellent shifting with a revolutionary shift logic. What’s more, with a recommended retail price of £2,060, SRAM Red eTap is almost a grand cheaper than Shimano Dura-Ace Di2, while also being lighter too.”
“The large area in conjunction with the clear pressure point provides a safe operation in any situation - even when wearing thick winter gloves or strong vibrations. This part of the mechanical DoubleTap lever was a good idea.”
“This is it, the revolutionary RED eTap: a fast and smooth functioning electric circuit that works just how friends of SRAM groups dreamed it would.”
“Our expectations of the RED eTap were high - the system has met the practical tests, it not exceeded them. Because the system works extremely well, it is a lot of fun and it exudes a fascination that the familiar wired circuits do not have.”
“In reality, it only takes a couple of miles to get used to… After a couple of rides, it simply becomes second nature. In fact, it makes it hard to go back to a conventional groupset.”
"The novelty of right goes harder, left goes easier, both shift the front wears off, but the appreciation of its simplicity does not. It just works so damn well and is so intuitive that it doesn’t matter if you’re coming from a mechanical SRAM group or any version of Shimano or Campy group, you’ll learn this in a minute and then it’s just second nature."
"After spending three months riding it, it’s safe to say that eTap is a truly revolutionary component group that raises the bar for what an electronic drivetrain can be. And it may even redefine the way we shift our bikes."
"But SRAM’s new offering, Red eTap, effectively turns bikes into micronetworks that allow shifting that is both wireless and electronic."
"Despite wireless advances since then, SRAM quickly discovered that off-the-shelf wireless systems were not up to the job. With Bluetooth, for example, there was too great a time lag. Other systems strained batteries. As a result, SRAM was left to come up with a wireless system of its own."