SRAM X-SYNC Eagle Aluminum -4mm F1
X-SYNC Eagle Aluminum -4mm F1
SRAM

SRAM X-SYNC Eagle Aluminum -4mm F1

$45.00
In Stock

Lightweight 34T aluminum SRAM X-SYNC chainring with a -4mm offset for optimized Eagle chainline and superior chain retention. Direct-mount 3-bolt, 12-speed ready.

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Product Details

Overview & Technology

SRAM X-SYNC Eagle Aluminum -4mm F1 (34T) is a purpose-built replacement chainring for 12-speed Eagle drivetrains. It combines a narrow-wide tooth profile with a precision-machined aluminum body to keep your Eagle chain engaged, reduce drop risk, and maintain crisp shifting under load. The -4mm offset positions the chainring to match modern Eagle chainlines and frame standards for better drivetrain alignment. Finished in black and designed as a direct-mount SRAM 3-bolt part, this ring delivers a balance of light weight, strength, and reliable on-trail performance.

Key Features & Benefits

Narrow‑wide tooth profile: Alternating thick and thin teeth hold the 12-speed Eagle chain securely, reducing chain drops and improving pedaling confidence on rough terrain. This tooth geometry is tuned for Eagle chain widths and ramping for smooth engagement. • Aluminum construction: Lightweight and durable for everyday trail use and race days. • Direct mount 3‑bolt BCD: Fast installation and compatibility with SRAM direct-mount crank interfaces. • -4mm offset: Optimizes chainline on many modern mountain bike frames and SRAM setups for cleaner shifting and less drivetrain wear.

Fit, Compatibility & Installation

This ring is a SRAM Model ID CR-XSNC-DM-F1 and fits SRAM direct-mount 3-bolt crank interfaces that accept X-SYNC Eagle chainrings. It is specified for 12-speed Eagle drivetrains and designed to work with Eagle chains and cassettes without altering derailleur settings when replacing like-for-like components. Installation is straightforward: remove your crank's direct-mount interface bolts, install the 3‑bolt chainring in the correct orientation (observe the F1 marking for any directional fit), torque bolts to manufacturer spec, and check chainline. Shipping weight is ~0.25 lb and the compact 5.9" x 5.9" x 1" package makes it an easy carry spare.

Who It's For

This X-SYNC ring is aimed at mountain bikers running SRAM 12-speed Eagle drivetrains who want a light, reliable, narrow-wide chainring for aggressive trail, cross-country, or all-mountain riding. It suits riders who value chain retention, predictable shifting and a minimal-weight upgrade or replacement option. Choose this 34T -4mm F1 if you ride a modern frame that benefits from a slightly inboard chainline, if you prefer direct-mount simplicity, or if you need a proven SRAM OEM-compatible spare for race day or maintenance.

Key Features

  • ✓ 34-tooth narrow-wide profile optimized for SRAM Eagle 12-speed chains
  • ✓ Precision-machined aluminum body for low weight and durable service
  • ✓ Direct Mount SRAM 3-bolt BCD for fast, tool-friendly installation
  • ✓ -4mm offset aligns chainline with modern Eagle-compatible frames
  • ✓ Black finish blends with most cranksets and drivetrain components
  • ✓ SRAM Model ID CR-XSNC-DM-F1 — OEM compatibility and fitment

Specifications

Narrow-Wide Design Yes
BCD Direct Mount SRAM 3 Bolt
Chainring Bolts 3
Teeth 30
Material Aluminum
Primary Color Black
Speed 12

Product Identifiers

Vendor Item # 11.6218.079.009
UPC 710845929182

Frequently Asked Questions

Is this chainring compatible with all SRAM cranks?

This ring is designed for SRAM direct-mount 3-bolt crank interfaces that accept X-SYNC Eagle chainrings. It will not fit non-direct-mount or Shimano-specific BCDs. Confirm your crank accepts SRAM 3-bolt direct-mount rings prior to purchase.

Will the -4mm offset work on my frame?

The -4mm offset is intended to position the chainring slightly inboard to match common Eagle chainlines on modern mountain frames. It’s suitable for many Boost and contemporary setups, but check your bike's manufacturer chainline recommendations if unsure.

Can I use this with a non-Eagle 12-speed chain?

This ring is tuned for 12-speed Eagle chain widths and ramping. While physically a 12-speed chain may fit, optimal retention and shifting performance are achieved with SRAM Eagle chains and drivetrain components.

How do I install the ring and what torque is required?

Install on compatible SRAM direct-mount 3-bolt cranks, observing any orientation marks (F1). Tighten bolts to the crank manufacturer's specified torque — typically found in the crank or bolt documentation. Use a calibrated torque wrench to avoid over-tightening.

What maintenance will extend the ring's life?

Keep the ring and chain clean and properly lubricated, replace worn chains to prevent accelerated tooth wear, and inspect for bent or damaged teeth after impacts. Aluminum rings will eventually show wear but are economical to replace.

Is this an OEM part number for SRAM?

Yes — this product corresponds to SRAM’s model ID CR-XSNC-DM-F1 and manufacturer part number 11.6218.079.009, making it an OEM-compatible X-SYNC Eagle replacement.

Buying Guide

When buying a direct-mount chainring, confirm your crank interface (SRAM 3-bolt direct mount in this case), chain speed compatibility (12-speed), and the correct tooth count for your desired gearing. Consider offset: rings with specific offsets like -4mm alter chainline and can improve shifting and chain retention when matched to modern frames. Choose aluminum X-SYNC rings for a balance of weight, cost and durability. If you want extra longevity or weight savings, compare to steel or CNC-machined high-grade aluminum options, but ensure tooth profile and compatibility remain correct for SRAM Eagle systems.

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