SRAM GX1 Eagle AXS Upgrade Kit

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Product Description


With proven AXS wireless technology, and the rugged durability of GX, it’s Eagle at its best. Featuring an expanded 520% range, seamless compatibility with the rest of the ecosystem, and the ability to customize with the AXS app, GX Eagle AXS is your entry point to the future. 

The day in, day out Eagle ecosystem hero is now available with AXS. New for 2021, The GX AXS upgrade kit is your entry point into wireless drivetrain simplicity. Compatible with any of our Eagle ecosystem cassettes and crank arms, the upgrade kit allows you to experience AXS without needing to buy an entire groupset provided you already are using Eagle products. No matter if you are looking to upgrade your ride, or looking for great value replacement parts, look no further than the GX AXS upgrade kit.

Pair and assign your AXS components any way you want. Using the AXS app you can assign any touchpoint to any function on your controllers. More choice means a cockpit you can customize to your liking.

Using the AXS App and AXS web programs allows you to understand your drivetrain like never before. The programs allow you to track your shifts, assign touchpoint commands, see real-time battery life and more. Using your head unit or smart phone allows you to never miss any AXS updates while out on the trail.


Riders want a derailleur that shifts on command, whether under climbing load or sprinting to the stage finish. The GX Eagle AXS derailleur gets it done with everything you have come to expect from our AXS connect components. The GX Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. Engineered with a variety of rider preferences in mind, it is compatible with our new expanded range 10-52T cassette as well as our 10-50T cassette. Showcasing its lineage from the proven GX Eagle mechanical line, the GX Eagle AXS derailleur is there for one thing—
to do the job.

• AXS enabled componentry software that makes it possible to both program and personalize new SRAM and RockShox components with Eagle technology
• Overload Clutch protection
• Finished with the GX Eagle colorway


Simplicity and performance made for all day adventures. The pure shifting performance of Eagle AXS is now available with GX. Shift under load, over the roughest terrain, uphill, without changing your grip on the bar. GX Eagle AXS changes your level of control on the bike when you’re under pressure and pushing hard. More than that, it changes your relationship with the bike. No cable, housing or wires to manage opened up design and engineering possibilities with the GX Eagle AXS controller. Featuring the proven ergonomic touchpoints that make shifting effortless, they are customizable to your preferences, allowing you to choose which button does what through the AXS App.

• Compatible with MatchMaker X
• Eagle technology
• Customize in-board and outboard shift options
• Pairs with all derailleurs in the Eagle AXS ecosystem
• AXS enabled componentry software that makes it possible to both program and personalize new SRAM and RockShox components
• System is completely water and dust proof to IP69K


The SRAM Battery offers approximately 20 hours of ride time or more, weighs just 25g and is detachable with a single clip. It’s also “hot swappable” if needed – from your Eagle AXS derailleur to your RockShox Reverb AXS seatpost or even your SRAM eTap AXS road group. And it only takes an hour to charge.

Occasionally, without notice, manufacturers change product design and/or specifications.

What Is A Groupset?


What Is A Groupset?


The groupset is all the parts that make up the drivetrain and brakes of a bike, transferring power from your legs to the rear wheel to moving you along and slowing you down. They vary significantly with discipline, with road and mountain bikes requiring different things from the groupset. Pricing can vary enormously and expectedly reflects the performance gains. The greater the price, the more features, lighter weight and better materials.

Road groupsets and mountain bike groupsets have significant differences, catering to their riding styles, with strength, weight and gear ratios varying in importance between the two. The three big drivetrain manufacturers found on the majority of bikes are Shimano, SRAM and Campagnolo.



Also referred to as the crankset, the chainset consists of two crank arms combined with one, two or three chainrings, depending on the application. Some chainsets are just the crank arms with the axle being a part of the bottom bracket (see below), whereas others have the axle fixed to the driveside arm. Pedals are attached to the ends of the crank arms.

Location of Chainset on a bike Image of Chainset and location on the bike


Bottom Bracket

The bottom bracket is what connects the chainset to the bicycle. It sits inside the frame and includes bearings allowing the chainset to spin freely. Some bottom brackets include the axle (as pictured), which the chainset connects to. Other bottom brackets are bearings only, with a hole in which the axle of the chainset fits into. There are threaded bottom brackets and pressfit options.

Location of Bottom Bracket on a bike Image of Bottom Bracket and location on the bike



The stoppers. The vast majority or mountain bikes have disc brakes. They have a caliper that grabs onto a rotor, which is attached to the centre of the wheels. Many road bikes have disc brakes but most still have rim or caliper brakes that squeeze the top of the rim. Rim brakes use cables to pull the arms together to squeeze the rim of the wheels.

Location of Brakes on a bike Brake from a groupset on a Bike


Brake Levers

Brake levers are what activate the brakes. Road bike brake levers double as the shifters. They have multiple movements to shift and brake separately. Mountain bike brake levers only actuate the brakes. Both mountain and road brakes can either use a cable or hydraulic fluid to activate the brakes.

Location of Brake Levers on a bike Brake Levers from a Groupset



The shifters use a cable that connects to the derailleurs (see below) to change the gears. Most mountain bikes bikes use trigger shifters attached to the handlebar to do this. Road bikes combine the brake lever and shifter into one unit. The left shifter will change the front derailleur and the right will change the rear derailleur. Electronic shifting can be found on very high end bikes too.

location of Shifters on a bike Shifters from a Groupset



Also known as ‘mechs’, the derailleurs are used in conjunction with the shifters to change the gears. There are often two derailleurs, one in the front and one in the rear. The front derailleur changes the front gears (or chainrings) while the rear derailleur changes the rear gears on the cassette. Front derailleurs are becoming less common on mountain bikes.

Image of a Derailleurs location on a bike Mech / derailleur from a groupset



The chain is what drives the bike. It connects the chainset to the cassette, going through the derailleurs to move the bike. Chain are specific to how many speeds are in the drivetrain. So, an 11 speed chain will only work with an 11 speed cassette etc.

location of a chain on a bike from a groupset Picture of a chain from a groupset



The cassette is the cluster of gears or sprockets on the rear wheel. It has teeth of varying numbers to set the different ratios of difficulties of the gears. The number of gears range from 6-12. Rear derailleurs are used to move the chain up and down the cassette to change the gears, and are actuated by the shifters. The bigger the sprocket, the easier it is to pedal, while the smaller the sprocket, the harder it is.

location on a bike of a cassette from a groupset Picture of a cassette from a groupset


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