SRAM X-Sync 42T 110mm - 11.6218.015.002
SRAM

SRAM X-Sync 42T 110mm - 11.6218.015.002

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SRAM X-Sync 42T outer chainring — precision-machined aluminum, 110 BCD 5‑bolt, narrow‑wide teeth for 11‑speed drivetrains. Improves chain retention and reduces drops on 1x setups.

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Product Details

Overview & Technology

SRAM X‑Sync technology brings a specially profiled narrow‑wide tooth pattern to this 42‑tooth outer chainring, engineered to lock 11‑speed chains in place and dramatically reduce chain drops. The ring is made from precision‑machined aluminum and finished in a durable grey coat that resists corrosion and scuffs from everyday trail use. Why it matters: the X‑Sync tooth geometry alternates narrow and wide teeth to match chain links, maximizing contact area on every link and delivering quieter, more reliable engagement under pedaling forces. That translates to better chain retention on rough, technical terrain and more consistent shifting when paired with compatible SRAM 11‑speed components.

Key Features & Construction

This chainring uses a 110mm bolt circle diameter (BCD) with a 5‑bolt mounting pattern and is optimized for 11‑speed chains. The narrow‑wide X‑Sync profile is specifically tuned for outer chainring duty, balancing fast acceleration with secure retention. The ring is lightweight (≈0.3 lb shipping weight listed) and precision machined to maintain stiffness where you need it most. Construction details: crafted from high‑grade aluminum and finished in grey, the ring offers an excellent strength‑to‑weight ratio and resists deformation under heavy loads. The machined tooth profiles and ramping are optimized for clean chain pickup and smooth engagement when accelerating or backpedaling gently during technical maneuvers.

Fit, Compatibility & Installation

The X‑Sync 42T fits any crankset that accepts a 110mm BCD 5‑bolt outer ring and is designed for 11‑speed drivetrains. It is intended as an outer chainring for SRAM X‑Sync systems but will work with other cranks that match the 110 BCD standard; always confirm crank compatibility and chainline before purchase. Installation notes: use correct 5‑bolt chainring bolts and torque to the crank manufacturer’s specification. This ring is optimized for 11‑speed chains—mixing chainring speed ratings may cause suboptimal performance. If swapping tooth counts, check chain length and rear derailleur capacity and adjust as needed.

Who This Chainring Is For

This 42T X‑Sync ring is ideal for mountain riders running 1x 11‑speed drivetrains who want a higher top‑end gear for faster trail sections or gravel connectors. It suits cross‑country and trail riders who prioritize a lightweight, secure chainring that reduces the need for a clutchless or heavy bash guard setup. If you frequently ride rough, technical terrain or prefer simple, dependable 1x gearing without chain drops, this SRAM X‑Sync 42T is a practical upgrade or replacement that delivers proven chain retention and predictable drivetrain behavior.

Key Features

  • ✓ SRAM X‑Sync narrow‑wide tooth profile for superior 11‑speed chain retention
  • ✓ 110mm BCD, 5‑bolt fitment — fits compatible 110 BCD cranksets
  • ✓ Precision‑machined aluminum construction for light weight and stiffness
  • ✓ Grey finish resists corrosion and blends with modern crank aesthetics
  • ✓ Optimized as an outer chainring for clean chain pickup and engagement
  • ✓ Approx. 0.3 lb shipping weight — minimal rotating mass added
  • ✓ Ideal for 1x mountain setups needing more top‑end speed

Specifications

Narrow-Wide Design Yes
BCD 110
Chainring Bolts 5
Chainring Comp. X-Sync
Teeth 42
Material Aluminum
Position Outer
Primary Color Grey
Speed 11

Product Identifiers

Vendor Item # 11.6218.015.002
UPC 710845750618

Frequently Asked Questions

Will this chainring work with my crankset?

This ring requires a 110mm BCD 5‑bolt crankset—confirm your crank uses that BCD before buying. It is designed for SRAM X‑Sync systems but will fit any crank that accepts a 110 BCD 5‑bolt outer chainring.

Is the 42T ring compatible with 10‑ or 12‑speed chains?

The ring is optimized for 11‑speed chains and tooth spacing/profile is matched to 11‑speed widths. It may function with 10‑speed or 12‑speed chains in some cases, but you can expect less reliable shifting and retention compared with using an 11‑speed chain.

Do I need special bolts or tools to install it?

Standard 5‑bolt chainring bolts and a compatible long‑reach hex or Torx driver are all that’s required. Always use the bolt type recommended by your crank manufacturer and torque to the specified value to avoid loosening or damaging threads.

Can I use this as part of a 2x setup?

This ring is specified as an outer chainring and physically can be used in some 2x setups if the crank and front derailleur geometry permit. However, it's optimized for 1x single‑ring reliability and narrow‑wide engagement—2x performance may vary and require derailleur tuning.

How does tooth count affect performance?

A 42T ring raises gear ratio for higher top speed but makes low‑speed climbing harder compared with smaller rings. Choose tooth count based on expected terrain and your cadence preferences—42T suits riders wanting faster trail or gravel sections without sacrificing too much climbing capability.

Buying Guide

When choosing a replacement chainring pick the correct BCD (110mm here), bolt count (5), and speed rating (11‑speed). Select tooth count based on terrain—smaller rings help climbing, larger rings give higher top speed. Ensure the ring's narrow‑wide profile matches your chain and intended single‑ring setup. Material and construction affect weight and longevity: precision‑machined aluminum is a popular balance of lightness and stiffness. Finally, confirm crank and chainline compatibility and replace chainring bolts if they show wear to ensure a safe, lasting installation.

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