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SRAM Eagle 1x12

SRAM Eagle stands for 1x drivetrain systems that set new standards in terms of simplicity, lightness, performance and durability. The range includes the high-end groups XX1 and XO1, which are even available in the AXS Wireless Shifting version and the more affordable groupsets of GX, NX and SX. Thanks to the SRAM Eagle ecosystem, the groups are cross-compatible and you can adapt your mountain bike derailleur system to suit your needs. » Read more

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The SRAM 12-speed MTB Drivetrain System: How the Story Began

Since their launch in 2016, the SRAM XX1 and X01 Eagle 1x12 shifting groupsets with their innovative technologies have caused quite a stir in the market for mountain bike drivetrain components.
The developers from Schweinfurt have already succeeded in eliminating the front derailleur with the 1x11-speed predecessors, while still offering an attractive gear ratio for mountain bikers.
With the Eagle shifting system, the gear range has been increased once again, with more smooth gear steps at the same time. The latest evolutionary step, thanks to the 10-52T cassettes and optimized Eagle 12-speed rear derailleurs, achieves an impressive gear range of 520 percent and continues the MTB drivetrain revolution.
If you are not yet familiar with the Eagle universe, we have summarized all important information about the Eagle technology in the following section.

What Are the Key Facts of the SRAM Eagle Technology?

Basically all Eagle 1x12 derailleur systems and groupsets of SRAM, whether mechanical or electronical (AXS) are mainly based on the X-Dome cassette, an X-Horizon 12-speed rear derailleur with Roller Bearing Clutch and Cage Lock, a tuned Eagle chain as well as a 12-speed Eagle Trigger Shifter or Controller and a DUB 1x crank with X-SYNC Narrow-Wide chainring. There is no need for a front derailleur any more.
This uncomplicated design makes Eagle drivetrains even lighter and requires less maintenance. At the same time, the shifting speed increases due to narrow sprocket spacing and the range of gears increases to an impressive 500 or 520%. To ensure maximum acceleration even downhill or on long straights, all Eagle XD cassettes use the smallest 10 teeth sprocket.
Depending on your application and personal preferences, you can enter the Eagle world at at a reasonable price with the NX or reduce the weight to a minimum, starting with the GX Eagle and the X01 up to the top group XX1.
And best of all: All mechanical SRAM Eagle drivetrain components are cross-compatible.
The shifting components of AXS Wireless can also be interchanged and used with all Eagle cassettes and chains.

BIKE24 Workshop | SRAM GX EAGLE vs. X01 Eagle

Which SRAM Eagle Shifting System for Which Application?

GX Eagle, AXS XX1 or NX Eagle - with all these groupsets, you can quickly lose the thread. 
So which SRAM 12-speed drivetrain is suitable for which type of rider?
We start with the most price intensive XX1 Eagle AXS high-tech shifting group. With this derailleur group the signal is transmitted wirelessly from the controller to the rear derailleur. Furthermore, the XX1 stands for particularly low weight, maximum precision as well as shifting speed and is designed for cross-country racers and lightweight bike enthusiasts.
Enduro and trail riders with racing ambitions prefer the X01 Eagle AXS, which has an even more stable design but is also a wireless shifting system.

If you prefer cable actuated shifting, the mechanical SRAM Eagle shifting groupsets will always keep you ahead of the pack thanks to X-Actuation technology.
The light-weight SRAM XX1 Eagle for marathons and trail adventures is the top of the range again, closely followed by the X01 Eagle for enduro and all-mountain bikes with its 1x12 shifting performance and low weight.
The SRAM Eagle GX, which is very popular across all disciplines, offers a good compromise between price-performance ratio and weight. The associated XG1275 and the lighter XG1299 cassette are featuring a larger 52-tooth sprocket instead of a 50 for even greater versatility. The cages of the award-winning X-Horizon Eagle rear derailleurs have also been redesigned to take advantage of the impressive 520% gear range.

Especially price-conscious customers, who do not want to make any compromises in terms of shifting performance, can confidently choose the NX Eagle. The group including an 11-50 tooth cassette offers a still high 1x12-speed gear ratio, but with a rather moderate weight.
The SX Eagle has the same construction and durability advantages of the SRAM 1x12 drivetrains and is the most affordable entry into the Eagle range. But weighing more than 2 kg, it is also the heaviest groupset.
Both NX and SX Eagle groups includes cassettes for HG freewheel hubs. 
In addition to the complete groupsets, most Eagle series also offered as practical upgrade sets, which can be optimally supplemented with the preferred XG cassette and Eagle chain combination through the SRAM Eagle ecosystem.

 

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Will a SRAM Eagle Drivetrain Work on My Bike?

Basically, the compatibility of a SRAM Eagle group depends on the freewheel installed on your rear wheel and the hub axle standard of your bike or frame.
If an SRAM XD freewheel hub is already mounted, every X-Dome cassette will fit. If another freewheel is installed, many hub and wheel manufacturers offer suitable conversion kits.
In addition you have to choose the crank version that fits your frame to achieve the right chainline. 
Furthermore the 10-52 tooth cassettes are only compatible with the optimized rear derailleurs. The latest rear derailleurs are featuring fallback-compatibility, so they can also be used with the 10-50T cassettes.

Ride Fabulous Trails with the Wireless SRAM XX1 Eagle AXS Drivetrain

Is SRAM Eagle Only Available for MTBs?

The mechanical 1x12 SRAM Eagle mountain bike shift components are not compatible with the 1x11 SRAM road bike drivetrains. 

The AXS technology, however, makes it possible to combine the electrical SRAM RED and Force AXS 1x12 wireless shifting components, for example in the Gravel range, with an Eagle AXS MTB rear derailleur and an X-Dome cassette.

The trained technical team of the BIKE24 customer service will be happy to advise you further on the compatibility of the AXS components.

BIKE24 Techtalk | SRAM NX Eagle