SRAM RED AXS XPLR E1 Rear Derailleur – Max 46T

Name: SRAM RED AXS XPLR E1 Rear Derailleur – Max 46T
Brand: SRAM
SKU: RD-RED-1E-E1
Price: 713.00 GBP
Availability: InStock

£713.00 GBP

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The SRAM RED XPLR AXS E1 is distinctly different from the standard RED AXS road derailleur. It is a dedicated 1x13 gravel component that requires a UDH-compatible frame, the matching 10-46T XPLR cassette and a Road Flattop chain.

It combines precise wireless 13-speed shifting with a robust hangerless Full Mount design, powerful chain control and serviceable construction, making it an outstanding premium upgrade for fast Australian gravel racing, rough country roads and demanding mixed-surface adventures.

SRAM RED XPLR AXS E1 Rear Derailleur Features

Full Mount construction attaches around the rear axle on a compatible UDH frame for accurate alignment and excellent impact resistance.
Dedicated 1x13 design works with the SRAM XPLR 10-46T cassette to deliver a 460 per cent range with closely arranged high-speed ratios.
Magic Wheel lower pulley can continue rotating if debris enters the pulley structure.
MTB-inspired spring clutch helps control chain movement over corrugations, rocks and rough gravel.
Replaceable and rebuildable components improve long-term serviceability compared with a largely disposable derailleur design.

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SKU: RD-RED-1E-E1
Barcode: 710845892172

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The SRAM RED XPLR AXS E1 Rear Derailleur is a wireless electronic derailleur developed exclusively for SRAM’s 1x13-speed XPLR gravel drivetrain. It is not compatible with conventional derailleur hangers and cannot be substituted directly for a standard 12-speed RED AXS road derailleur.

Product type: Wireless electronic gravel rear derailleur
Product name: SRAM RED XPLR AXS E1 Rear Derailleur
Manufacturer model ID: RD-RED-1E-E1
Drivetrain configuration: 1x only
Number of speeds: 13
Compatible cassette: SRAM XPLR 10-46T 13-speed
Maximum rear sprocket: 46 teeth
Minimum cassette specification: 10-46T
Total cassette range: 460 per cent
Shift actuation: Electronic wireless
Communication system: SRAM AXS
Mounting system: SRAM Full Mount
Frame requirement: UDH-compatible frame with an approved hangerless interface
Conventional derailleur hanger compatible: No
Limit screws: No
B-gap adjustment screw: No
Mechanical shift cable: No
Compatible chain type: SRAM Road Flattop D1 or E1
SRAM T-Type chain compatible: No
Chain-management system: MTB-inspired spring clutch
Lower pulley: SRAM Magic Wheel debris-resistant design
Pulley bearings: Ceramic
Cage material: Carbon
Main colour: Silver with black and natural-carbon details
Battery format: Removable SRAM AXS rechargeable battery
Battery included: No
Existing AXS battery compatible: Yes
AXS app compatible: Yes
Firmware updates: Supported
Electronic control customisation: Supported
Rebuildable construction: Yes
Replaceable components: Yes
Intended use: Gravel racing, high-performance gravel, mixed-surface endurance and compatible all-road bicycles
Approximate independently measured weight: Around 400 grams without battery
Manufacturer’s suggested US retail price at launch: US$770

SRAM specifies the derailleur for the matching 10-46T XPLR cassette rather than offering compatibility with multiple cassette sizes. This fixed drivetrain architecture allows the derailleur position and shift path to be established through the Full Mount system without conventional limit or B-gap screws.

Full Mount hangerless construction

The SRAM RED XPLR AXS E1 Rear Derailleur mounts directly to both sides of the frame’s rear dropout and is secured around the rear wheel axle. This eliminates the separate derailleur hanger found on most traditional road and gravel bikes.

Referencing the derailleur position directly from the rear axle creates a repeatable relationship between the derailleur, cassette and wheel. It also removes a conventional hanger that can flex, rotate or bend and disturb indexing.

The Full Mount structure distributes impact loads around the axle instead of concentrating them through a small hanger bolt. This makes the system especially relevant to gravel bikes exposed to rocks, branches, deep ruts and transport damage. It does not make the derailleur indestructible, but it is designed to withstand and recover from impacts better than a lightweight road-style mounting arrangement.

Simplified screw-free adjustment

The derailleur does not use conventional high-limit, low-limit or B-tension adjustment screws. Its position is governed by the Full Mount interface, matched cassette and prescribed installation process.

Removing these adjustments reduces the number of settings that can drift or be incorrectly configured. Precise installation remains essential, particularly when establishing chain length and completing the initial setup sequence.

SRAM AXS wireless shifting

The derailleur communicates wirelessly with compatible SRAM AXS controls. Shift-button functions, battery information and firmware can be managed through the SRAM AXS app.

AXS functionality includes:

Wireless component pairing
Battery-level monitoring
Control personalisation
Firmware updates
Electronic micro-adjustment
Maintenance notifications
Component diagnostics
Integration with compatible AXS shift-brake controls and Wireless Blips

Because there is no mechanical shift cable, performance is unaffected by cable stretch, corroded inner wires or contaminated housing.

Magic Wheel lower pulley

The Magic Wheel lower pulley uses a two-part design that allows the outer toothed section to continue rotating around the inner section if an object becomes trapped in the pulley.

This means a small stick or piece of debris is less likely to lock the lower pulley completely and drag the derailleur into the wheel. Riders should still stop and remove any lodged debris as soon as it is safe. Magic Wheel is a damage-mitigation feature, not permission to continue riding indefinitely with an obstruction.

MTB-inspired spring clutch

The derailleur uses a strong spring clutch to control forward cage movement and reduce chain bounce. It is derived from SRAM’s experience with mountain bike Transmission drivetrains rather than the lighter Orbit fluid damper used on SRAM’s conventional road derailleurs.

Drivetrain fit

Drivetrain format: 1x13
Compatible cassette: SRAM XPLR 10-46T 13-speed
Maximum sprocket: 46T
Smallest sprocket: 10T
Cassette range: 460 per cent
Required freehub: SRAM XDR
Required frame interface: UDH-compatible Full Mount
Required chain: SRAM Road Flattop D1 or E1
Front derailleur compatibility: None
Conventional derailleur hanger compatibility: None

Crank and chainstay compatibility

SRAM provides different crank guidance according to chainstay length:

Chainstays of 415mm or longer: Use a compatible XPLR Wide crank configuration.
Chainstays of 414mm or shorter: A compatible standard road crank configuration may be used.

This distinction controls chainline and helps the chain run correctly between the front chainring and rear cassette. Chainstay length should be confirmed from the frame manufacturer’s geometry chart rather than estimated visually

The SRAM RED XPLR AXS E1 Rear Derailleur is best suited to gravel racers, high-performance adventure riders and discerning cyclists building a lightweight UDH-compatible gravel bike around the dedicated SRAM 1x13 ecosystem.

Velo published its review of the SRAM RED XPLR AXS 1x13 groupset on 1 August 2024 and regarded the system as a new benchmark for performance gravel drivetrains. The review highlighted the combination of close cassette spacing, increased range and Full Mount derailleur stability. Its most significant advantage was not simply the thirteenth sprocket, but the ability to offer useful climbing range without the large jumps normally associated with a wide-range 1x gravel cassette.

DC Rainmaker published an in-depth review on 1 August 2024 after approximately one month of testing across varied terrain, including a multi-day mountain trip. The review identified the move from a modified road-style derailleur to a Transmission-influenced Full Mount design as the most important change. It also reported that the complete power-meter groupset weighed approximately 2,488 grams, although the high price and UDH frame requirement substantially limited the number of existing bicycles that could receive the upgrade.

The Radavist published Josh Weinberg’s review on 1 August 2024 after assessing the drivetrain from a racing and durability perspective. The review found that SRAM had effectively transferred its mountain bike Full Mount concept into a lighter gravel package, producing a derailleur aimed at riders who need race-level shifting without treating rough-course resilience as an afterthought

Routine cleaning

Wash the derailleur with mild bicycle cleaner, clean water and a soft brush.
Remove dust, grass and compacted mud from the cage and pulleys.
Do not direct high-pressure water at the pivots, bearings, motor housing or battery contacts.
Dry the component after wet rides and creek crossings.
Remove excess chain lubricant before it attracts abrasive dust.
Avoid aggressive solvents around the seals and electronic housing.

Magic Wheel inspection

Check the lower pulley after rides through sticks, long grass or loose debris.
Remove trapped material before it damages the pulley or chain.
Confirm that both parts of the pulley rotate correctly.
Inspect the pulley teeth for chips and abnormal wear.
Do not dismantle the mechanism without following SRAM’s service procedure.
Replace damaged pulley components with approved SRAM parts.

Chain and cassette care

Clean and lubricate the Road Flattop chain regularly.
Use lubricant appropriate for dry dust, wet gravel or mixed conditions.
Check chain wear with a compatible gauge.
Replace a worn chain before it accelerates wear on the expensive cassette and chainring.
Inspect the cassette after rock impacts.
Use a new SRAM-approved PowerLock when the chain is replaced or opened where required.
Do not fit a SRAM T-Type mountain bike chain.

Battery maintenance