Truvativ 9 Speed Steel 104mm BCD
9 Speed Steel 104mm BCD
Truvativ

Truvativ 9 Speed Steel 104mm BCD

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Durable Truvativ 42T steel outer chainring for 9-speed MTB triple cranks with 104mm 4-bolt BCD. A robust, SRAM-compatible replacement built for long life and reliable shifting.

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Product Details

Overview & Technology

Built for durability and dependable shifting: this Truvativ outer chainring is a 42-tooth, 9-speed ring manufactured in stamped steel with a 104mm 4-bolt BCD to fit standard MTB triple cranksets. It carries SRAM model ID CR-MLEG-104-A1 and Truvativ part number 11.6215.016.000, so it drops straight in where a 104mm outer ring is specified. The steel construction prioritizes wear resistance and impact toughness over weight savings—ideal for riders who need a rugged replacement for trail abuse, commuting or heavy-use bikes. The ring is finished in black to resist corrosion and to match common crank aesthetics.

Key Features & Benefits

Simple, serviceable design: A 4-bolt 104mm BCD pattern ensures broad compatibility with many MTB triple crank arms and makes installation straightforward with standard chainring bolts. This is an outer-position ring sized to restore chainline and shifting when paired with your existing middle and inner rings. Real-world advantage: Steel teeth hold up longer against gritty conditions than many alloy alternatives, reducing the frequency of replacement for riders who log heavy miles or ride in mud and grit. The 42T tooth count offers solid climbing gear range and usable top-end speed for varied terrain.

Fit, Compatibility & Specs

This ring uses a 104mm 4-bolt BCD and is intended as an outer chainring for 9-speed MTB triple setups. Confirm your crank's bolt circle diameter is 104mm and that it accepts 4-bolt outer rings. Key specs: 42 teeth, steel construction, outer position, black finish. Manufacturer number: 11.6215.016.000; SRAM ID: CR-MLEG-104-A1. Weight and dimensions: shipping size 7.2" x 7.2" x 0.8" and nominal weight about 0.47 lb. It pairs with 9-speed chains and will work best when matched with the correct middle/inner ring spacing for your crank to maintain crisp shifting.

Who This Chainring Is For

This Truvativ 42T 104mm BCD steel ring is aimed at mountain riders, bikepackers, commuters and anyone running a 9-speed MTB triple who needs a durable, cost-effective replacement. It is especially good for heavier riders, riders in wet or muddy climates, or bikes that see hard daily use where longevity matters more than gram-count. If you ride cross-country races where every gram counts you might prefer an aluminum or narrow-wide ring, but for trail riders and utility bikes this steel ring is a practical, long-lived choice that keeps your drivetrain working reliably.

Key Features

  • ✓ 42-tooth outer chainring sized for 9-speed MTB triple drivetrains
  • ✓ 104mm 4-bolt BCD fits a wide range of Truvativ and SRAM cranks
  • ✓ Stamped steel construction resists wear and tolerates trail impacts
  • ✓ Black finish for corrosion resistance and understated aesthetics
  • ✓ SRAM model CR-MLEG-104-A1 and Truvativ part 11.6215.016.000
  • ✓ Direct replacement for worn outer rings on 9-speed triple setups
  • ✓ Easy installation with standard chainring bolts and basic tools

Specifications

BCD 104
Chainring Bolts 4
Teeth 42
Material Steel
Position Outer
Primary Color Black

Product Identifiers

Vendor Item # 11.6215.016.000
UPC 710845408212

Frequently Asked Questions

Will this chainring fit my crankset?

This ring fits cranks that use a 104mm 4-bolt BCD and accept an outer ring for a 9-speed triple. Verify your crank bolt circle diameter is 104mm and that your crank arms use the 4-bolt outer mounting pattern before purchasing.

Is the ring compatible with 10- or 8-speed chains?

It is optimized for 9-speed chains; while 8- and 10-speed chains may physically fit, shifting performance can be compromised. For best results use a 9-speed chain and matched drivetrain components.

Should I choose steel or aluminum for my chainring?

Steel offers superior wear resistance and toughness—great for heavy use, muddy conditions, and budget replacements. Aluminum saves weight and can shift faster but wears faster under grit and heavy loads. Choose steel for durability, aluminum for performance.

Can I use this ring as a single-ring conversion?

This is an outer-position ring designed for triple cranks and may not provide optimal chainline or narrow-wide tooth profile for single-ring use. If converting to a 1x system, select a dedicated narrow-wide chainring sized for your crank BCD and chainline.

What tools do I need to install it?

Installation typically requires a set of hex/allen keys for your crank bolts or a chainring bolt socket, a torque wrench if you want accurate tightening, and possibly a crank puller if your crank needs removal. Refer to your crank manufacturer for torque specs.

Buying Guide

When buying a replacement chainring, match the bolt circle diameter (BCD), tooth count, and intended position (inner/middle/outer) to your crank. For 9-speed MTB triples, a 104mm 4-bolt outer ring like this Truvativ 42T is a common standard—confirm BCD and chain compatibility before ordering. Consider your riding conditions: pick steel for durability and longevity in muddy or heavy-use scenarios, or aluminum for weight savings and marginally sharper shifting. Always inspect chain and cassette wear when replacing a ring to ensure smooth operation and even wear across the drivetrain.

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