SRAM X1
SRAM

SRAM X1

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The SRAM X1 rear derailleur delivers stable, precise 11-speed 1x shifting with X-HORIZON geometry, Roller Bearing Clutch and Cage Lock. Long-cage, 256 g and rated for up to 42T cogs.

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Product Details

Overview & key technologies

SRAM X1 brings focused, no-nonsense performance for 1x mountain drivetrains. Built around SRAM's X-HORIZON geometry, the X1 keeps the upper pulley in a consistent lateral plane to eliminate ghost shifts and improve chain retention during aggressive climbing and technical descents. The derailleur pairs X-ACTUATION shift compatibility with a Roller Bearing Clutch (Type 2.1) for controlled chain behavior and a CAGE LOCK feature that makes wheel removal and installation faster. At 256 g and with 12T X-SYNC pulley wheels, the X1 balances low weight with durable materials for everyday trail use.

Construction, materials and real-world benefits

The X1's main body and cage use lightweight, high-strength aluminum alloy for stiffness and precision, while fast-wearing wear points are reinforced with hardened steel hardware. Pulley wheels are SRAM's 12T X-SYNC design with a silent tooth profile to reduce drivetrain noise and improve chain control across the gear range. In the real world this translates to crisp shifts under load, less chain slap on rough trails and easier maintenance. The Roller Bearing Clutch minimizes chain bounce and keeps the chain tensioned when you hit roots, rock gardens or big hits — reducing dropped chains and noisy trail rides.

Fit, compatibility and limits

The X1 is specified for 11-speed SRAM drivetrains using X-ACTUATION actuation ratios and mounts to a standard derailleur hanger. This long-cage version supports a maximum cog size of 42T with a maximum front difference of 18T, making it ideal for 1x setups with wide-range cassettes. Mounting is standard direct hanger mount; B-tension and limit screws adjust as with most SRAM derailleurs. Note: the X1 is designed for 11-speed systems and is not compatible with SRAM 12-speed Eagle shifters or 10-speed systems — confirm shifter compatibility before installation.

Who should choose the SRAM X1

The X1 is aimed at trail and all-mountain riders who want a rugged, affordable 1x derailleur that delivers reliable shifts and strong chain control without the premium price of top-tier Eagle parts. It’s an excellent upgrade for bikes running 11-speed wide-range cassettes and riders who value simplicity and durability. If you race local XC or ride aggressive singletrack and need a dependable long-cage derailleur that handles 42T cassettes, the X1 balances performance, weight (256 g) and value — delivering straight-forward maintenance and confident shifting on technical terrain.

Key Features

  • ✓ X-HORIZON geometry for consistent lateral pulley alignment
  • ✓ Roller Bearing Clutch (Type 2.1) for superior chain control
  • ✓ CAGE LOCK simplifies wheel removal and on-trail maintenance
  • ✓ 12T X-SYNC pulley wheels with silent tooth profile
  • ✓ Lightweight aluminum construction at just 256 grams
  • ✓ Supports up to 42T cassette with long-cage capacity
  • ✓ Designed for SRAM 11-speed X-ACTUATION systems
  • ✓ Long cage handles 18T maximum front chainring difference

Specifications

Max Front Difference 18T
Maximum Cog 42T
Primary Color Black
Cage Long
RD Weight 256g
Speed 11
Mount Standard

Product Identifiers

Vendor Item # 00.7518.070.000
UPC 710845764028

Frequently Asked Questions

Is the SRAM X1 compatible with 11-speed SRAM shifters?

Yes. The X1 uses SRAM X-ACTUATION actuation designed for SRAM 11-speed shifters. It will not shift correctly with 12-speed Eagle shifters or non-SRAM 11-speed shifters that use different actuation ratios.

What is the largest cog this derailleur can handle?

This long-cage X1 supports a maximum cog size of 42T. It also specifies a maximum front chainring difference of 18T, so pair it with appropriate chainring and cassette combinations to stay within capacity.

What does the Roller Bearing Clutch do and how does it help?

The Roller Bearing Clutch (Type 2.1) increases chain tension and resists derailleur cage movement during impacts, which reduces chain slap and the likelihood of a dropped chain. It improves stability on rough descents and during technical pedaling.

Can I install the X1 on any bike frame?

The X1 uses a standard derailleur hanger mount common to most modern mountain frames. Ensure your frame has a replaceable hanger and that your shifter is SRAM 11-speed compatible. B-tension clearance should accommodate a 42T cog.

How do I use the CAGE LOCK feature?

CAGE LOCK mechanically holds the cage in a forward position to slacken chain tension, making wheel removal and installation easier. Engage the lock per SRAM instructions during wheel changes, then release before riding to restore normal chain tension.

What maintenance does the X1 require?

Routine maintenance includes keeping pulleys free of debris, checking pulley bearings for smooth rotation, and periodic clutch inspection. Clean the derailleur after muddy rides and re-tension or replace hardware if you notice excess play or worn teeth.

Buying Guide

When choosing a mountain rear derailleur, match speed and actuation first: this X1 is built for SRAM 11-speed systems using X-ACTUATION. Choose cage length based on cassette range and chainring setup — long cage for big-range cassettes up to 42T and larger chainring differences. Look for a derailleur with a clutch (Type 2.1 is a proven option) if you ride rough trails or want fewer dropped chains. Consider materials: aluminum bodies offer stiffness and low weight, while robust pulleys and sealed bearings reduce maintenance and extend service intervals.

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