SRAM X-Sync Asymmetric
X-Sync Asymmetric
SRAM

SRAM X-Sync Asymmetric

$60.00
In Stock

Replacement X-Sync Asymmetric chainrings for SRAM Apex cranks — CNC-machined aluminum with narrow-wide teeth for improved 11-speed chain retention. Available in 40T, 42T and 44T BCD 110 options.

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Available Options

Option Price Availability
SRAM, X-Sync Asymmetric, 42T Chainring, 11sp, BCD: 110, Aluminum, Black $60.00 In Stock
SRAM, X-Sync Asymmetric, 40T Chainring, 11sp, BCD: 110, Aluminum, Black $50.00 Out of Stock

Product Details

Overview & Technology

SRAM X-Sync Asymmetric chainrings are engineered as a direct replacement for Apex asymmetric cranks, delivering reliable single-ring performance for 11-speed drivetrains. The narrow-wide tooth profile locks the chain in place, minimizing drops and improving chain retention across rough terrain and mixed-surface rides. Manufactured from precision-machined, high-strength aluminum and finished in hard black anodize, these chainrings combine low weight with a stiff platform for predictable shifting and long service life. The asymmetric design and specific tooth geometry are optimized to correct chainline and improve engagement with SRAM 11-speed chains.

Key Features & Benefits

Narrow-Wide tooth profile: Alternating narrow and wide teeth match the inner and outer links of an 11-speed chain to greatly reduce chain drops without the need for a clutch derailleur. That means cleaner, quieter pedalling and fewer interruptions on long gravel rides. Precision construction: CNC machining and a finished anodized surface provide consistent tooth profiles and a corrosion-resistant finish. Available in 40T, 42T and 44T sizes on a 110 BCD with 4-bolt mounting for simple swap-in replacement.

Fit, Compatibility & Installation

These chainrings are designed specifically for SRAM Apex asymmetric cranksets and use a 110 BCD, 4-bolt pattern. They are matched to 11-speed chains and drivetrains — check your crank model and BCD before ordering. Shipping dimensions are compact (7.9" x 7.6" x 0.4") and the ring weighs approximately 0.2 lb, keeping overall bike weight low. Installation is straightforward: remove the crank spider bolts, swap the ring using the original hardware, and torque bolts to the crank manufacturer's specification. For best results, pair with a good-quality 11-speed chain and inspect bolt condition — replace bolts if worn or rounded.

Who This Chainring Is For

This ring is ideal for riders converting SRAM Apex cranksets to a dependable 1x setup — especially gravel riders who value chain retention, reliability and low weight. Choose 40T, 42T or 44T to tune your gearing for rolling singletrack, mixed gravel routes or faster fire-road efforts. It's also a practical replacement for road or mixed-surface riders who want the simplicity of a single-ring drivetrain without sacrificing crisp shifting and chain security on rough descents.

Key Features

  • ✓ Narrow-wide tooth profile for superior chain retention on 11-speed chains
  • ✓ Precision CNC-machined aluminum construction for low weight and stiffness
  • ✓ Asymmetric design tuned for SRAM Apex crank chainline and engagement
  • ✓ Available in 40T, 42T and 44T sizes to fine-tune gearing
  • ✓ 110 BCD, 4-bolt mounting for direct swap on compatible cranks
  • ✓ Black anodized finish resists corrosion and looks discrete on frames
  • ✓ Lightweight — shipping weight ~0.2 lb keeps rotating mass down
  • ✓ Optimized for single-ring setups used in gravel and mixed-surface rides

Specifications

Narrow-Wide Design Yes
BCD 110
Chainring Bolts 4
Teeth 40
Material Aluminum
Position Single
Primary Color Black
Speed 11

Product Identifiers

Vendor Item # 11.6218.037.010
UPC 710845804502

Frequently Asked Questions

Will this fit my crankset?

The X-Sync Asymmetric rings are made for SRAM Apex asymmetric cranks with a 110 BCD and a 4-bolt pattern. Verify your crank model and bolt circle diameter before purchasing; if your crank uses a different BCD or proprietary mounting, this ring will not fit.

Is this chainring compatible with 10- or 12-speed chains?

These rings are specifically profiled for 11-speed chains. While a 10-speed chain may work in some cases, optimal performance and chain retention depend on using an 11-speed chain. For 12-speed systems, use rings designed for 12-speed tooth profiles.

How do I choose between 40T, 42T and 44T?

Select teeth based on your preferred cadence, terrain and wheel size. 40T gives easier climbing gearing for technical or steep routes, 44T suits faster flats and open gravel. Consider your cassette range and riding style when choosing.

Do I need a clutch rear derailleur with this ring?

A clutch derailleur helps control chain slap and further reduces the chance of drops, but the narrow-wide X-Sync profile is designed to provide strong chain retention on its own. For very rough riding or extra security, pairing with a clutch derailleur is recommended.

Can I reuse my existing chainring bolts?

You can reuse bolts if they are in good condition and not rounded or corroded. Inspect threads and heads, and replace hardware if there are signs of wear. Use the torque specifications provided by your crank manufacturer during installation.

How long will the chainring last?

Longevity depends on riding conditions, chain maintenance and mileage. Regular cleaning, keeping your chain well-lubricated, and replacing worn chains promptly will extend ring life. Aluminum narrow-wide rings will show wear over time, but provide excellent service before needing replacement.

Buying Guide

When buying a replacement chainring for an 11-speed SRAM Apex setup, confirm BCD (110) and bolt count (4) to ensure fit. Choose your tooth count based on terrain: lower teeth for climbing-focused rides, higher teeth for speed on flats. Match the ring to a quality 11-speed chain to preserve engagement and reduce premature wear. Consider material and construction: aluminum rings offer a strong, lightweight option ideal for gravel and mixed-surface use. If you ride aggressively on rough trails, pairing a narrow-wide ring with a clutch rear derailleur gives the most secure chain retention and quiet operation.

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