SRAM's AXS drivetrain can occasionally encounter a problem, merely it's normally hands stock-still.

SRAM'south wireless AXS drivetrain has a agglomeration of benefits, including clean cable(less) routing, no shift degradation due to cable wear, and ease of installation, just most of all it ways crisp, smooth shifting pretty much all of the time. Unfortunately, every bit great as it is, AXS drivetrains are all the same susceptible to some of the same problems every bit whatever normal drivetrain system, and some new issues equally well. I'll be talking through some of the trailside or dwelling workshop fixes you can carry out to keep your AXS drivetrain running sweet.

Earlier I get into information technology, I'll mention that SRAM has some helpful technical manuals and that it's worth taking the time to look through the Eagle AXS manual to set your derailleur up or acquire well-nigh some of the technical procedures.

Mechanical fixes

Imagine an example where you might be riding and find that your shifting just isn't quite correct. Maybe information technology doesn't desire to stay in a certain gear or is skipping in and out of gears. Perhaps information technology shifts okay simply the concatenation is making a bunch of dissonance in one or several gears similar it virtually wants to shift. At that place are things you tin do electronically to ready this, simply first permit's become back to basics and cheque the nuts and bolts because at the terminate of the twenty-four hours, it's however a derailleur.

Always cheque the master derailleur fixing bolt as a first pace. Side annotation: if the green LED is visible while shifting it means that the battery is good.

One of the most mutual, and fortunately hands-fixed problems that occur on a 12-speed derailleur organisation is but that the main commodities that fixes the derailleur to the rest of the bike is a couple of turns loose. Over time this bolt can back itself out as the suspension cycles and the derailleur pivots effectually the bolt, moving the derailleur outboard and giving the same effect equally a lack of cable tension. It'due south a expert idea to check this bolt kickoff and if it is loose or backed out, unremarkably just threading it back in solves the issue.

Dial the B-gap in or out to become that 3mm gap perfect

The B-gap on a SRAM 12-speed derailleur is a critical adjustment and tin can brand the difference between your drivetrain shifting smooth and well-baked, and it existence sloppy and vague. Showtime by shifting into the second largest sprocket. So, snap the white chain-gap tool onto the biggest sprocket and marshal the arrow with the eye of your upper pulley. Ideally, this is done nether sag then you'll likely demand somebody to assist you. If you don't have the tool simply use a measuring tool to ensure that the gap between the teeth on the upper pulley and the teeth on the biggest cassette sprocket is approximately 3mm. Utilise a 3mm hex key to dial the B-gap spiral either in or out to go that 3mm gap perfect.

It can be worth checking to see if your derailleur/hanger is straight if the shifting is out

If you've smacked your derailleur into something — maybe a rock or a root — and bent the derailleur and/or hanger, often the best and easiest gear up is simply to swap out the hanger. Well-nigh frames these days accept a derailleur hanger that tin can exist replaced with the tools you carry on an average ride. It'due south ever worth carrying a spare hanger for the roughly $20 they normally cost as they tin solve some major headaches. If you heard your derailleur contact something and there are one or 2 specific gears somewhere that but aren't happy, it's likely that your hanger is aptitude. Fortunately, SRAM AXS derailleurs characteristic a clutch that allows it to move upon impact, meaning the derailleur is more than ofttimes than not intact after such an incident, and only the hanger is all that's needed. Only bandy it out and you're good to go.

If you're over-shifting into the spokes, just dial the lower limit spiral in a little.

If for some reason the derailleur is over-shifting into the spokes you'll need to adjust the low limit spiral, and if it jumps off the smallest cog you'll want to adjust the high limit. Simply discover the associated limit screw; the high limit is the almost inboard of the two and the depression is the most outboard. Shift into the offending gear and dial the limit screw in clockwise until you see the derailleur move in a small amount, and then dorsum the screw out half of a turn. This should exist enough to ensure the derailleur has no problem getting into the gear but doesn't over shift. Once y'all render dwelling it can be a good idea to await over the drivetrain and decide why the derailleur was over-shifting, as this is often the result of a bent hanger or another event that needs attention.

Store SRAM AXS parts and upgrades at Competitive Cyclist and JensonUSA.

If these mechanical fixes don't solve the problem yous're experiencing, you lot may demand to try an electronic set up. Fortunately, at that place are a few handy tricks to help get a SRAM AXS derailleur working smoothly again

Micro-conform

If for some reason the derailleur is shifting in one direction well, but poorly in the other, you may need to perform a micro-adjust. In a regular mechanical derailleur system, there is a cable that pulls the derailleur from the harder gears up the cassette into the easiest ones, and you can adjust the tension on that cable to pull it in one management or the other. Those that know how to adjust cablevision tension on a mechanical derailleur will find the micro-conform on an AXS derailleur immediately familiar considering it does exactly the same matter, electronically.

To perform a micro-adjust just hold downward the AXS push button on the shifter while shifting

To perform the micro-adjust, but concur downwards the small AXS button on the underside of the shifter and shift the paddle in whichever direction it isn't shifting properly. This is like shooting fish in a barrel to practice 1-handed while riding in a parking lot. Shift through the gears a few more times and see if you need more or less adjustment. If y'all've gone too far in the wrong direction, try going back the other manner. It's worth mentioning that if you demand to perform a micro-adapt to compensate for a bent derailleur/hanger, y'all should check your limit screws to make sure the derailleur doesn't over-shift into your spokes. This is common after a crash and tin can spell disaster.

Fresh battery

If your system is unresponsive, oft the principal culprit is a expressionless bombardment. You lot can check the status of your battery using the AXS phone app or by checking on the derailleur or shifter. Lights volition come up on every time a shift is executed; light-green ways the bombardment is good, ruby-red means it's low, and flashing red means very low. If information technology flashes red and green that means a shift has been rejected, which can happen when it's beneath -15ºC (5°F), then bear this in listen during winter months. If in that location's no light at all, your bombardment is likely dead.

A expressionless battery is the most likely crusade of a non-functional derailleur

It goes without proverb that you should continue on top of charging your batteries, however in the instance that you run your battery flat in the middle of a ride, you tin simply swap a new one in. If you run an AXS arrangement, conveying a spare battery at all times is a good thought, but if you don't happen to have one yous could swap the battery from your AXS Reverb dropper post into the derailleur. Just set the seat height somewhere that works for you and put the charged battery into the derailleur. You can always bandy them over again to change seat height for climbing/descending. In the upshot that you lot're running a drib-bar bike with a front derailleur, yous could as well swap the front/rear derailleur batteries over since the rear derailleur is usually the one doing most of the piece of work and will run out first.

Swapping the bombardment out on the shifter is well-nigh as easy every bit the derailleur

In the event that the shifter battery is dead, a rarer result for sure, simply apply a money to remove the embrace from the underside of the shifter and bandy a new CR2032 coin prison cell in there. This is a pretty mutual size and many stores will have them.

Re-pairing

If the derailleur stops working despite the LED next to the AXS push button lighting when you push button the button, re-pairing the derailleur and shifter tin can sometimes solve the trouble. Simply hold downward the AXS button on the rear derailleur until the LED blinks dark-green, then hold down the AXS button on the remote/shifter until the LED on that blinks green. Then push the AXS button on the rear derailleur a last fourth dimension and both LEDs will plow off. This should hateful that both units are paired and good to go. The same process can be carried out with the AXS Reverb and remote and should reset the system.

Firmware update

If re-pairing derailleur and shifter didn't work to solve inoperative shifting, it tin be worth checking for firmware updates. Head to the AXS app and get into each individual component to cheque whether the firmware is up to date or not. If the app says that at that place is new firmware bachelor for a component then follow the steps to push that update through. Note that you will need cell service to practice this. Cheque out this handy guide from SRAM.

It pays to keep an center on your bombardment levels and check for updates periodically.

Hopefully, this guide will help keep you rolling if the time comes. If not SRAM has a slap-up warranty service in near countries, so but take a trip to your local bike shop to see what they can do to assistance.