ELEVN Flow Chainring 104mm 45-50T

Product Overview

The ELEVN Flow Chainring is a CNC-machined aluminum chainring designed for BMX race applications using 104mm BCD (bolt circle diameter) four-bolt cranks. Manufactured from 6061-T6 aluminum, this chainring provides a lightweight alternative to steel while maintaining durability for racing use. Available in tooth counts from 38T to 50T, it allows riders to customize gearing ratios for different track layouts, rider size, and power output preferences.

Key Features

• 6061-T6 Aluminum Construction – High-strength aluminum alloy delivers reduced weight compared to steel chainrings while maintaining stiffness for efficient power transfer
• CNC Machined – Precision manufacturing ensures accurate tooth profiles for smooth chain engagement and consistent drivetrain performance
• 4.4mm Thickness – Reinforced thickness provides structural rigidity to resist flexing under heavy pedaling loads during sprints and accelerations
• 104mm BCD Four-Bolt Pattern – Standard bolt circle diameter fits most modern BMX race cranks using the 104mm four-bolt mounting interface
• Wide Tooth Count Range – Available from 38T to 50T to accommodate different rider preferences, track requirements, and gearing strategies

Technical Specifications

• Material: 6061-T6 aluminum alloy
• Bolt Pattern: 4-bolt
• BCD (Bolt Circle Diameter): 104mm
• Thickness: 4.4mm
• Chain Compatibility: 3/32" (standard BMX/single-speed chain)
• Available Sizes: 38T, 39T, 40T, 41T, 42T, 43T, 44T, 45T, 46T, 47T, 48T, 49T, 50T (availability may vary)
• Weight: 122g (44T reference)
• Finish: Color options available

Compatibility and Ideal Use Cases

Compatibility Requirements: Requires cranks with 104mm BCD four-bolt chainring mounting pattern. Verify your cranks use 104mm BCD before purchasing—common BMX race cranks often use this standard, but some use different bolt patterns (110mm, 96mm, or proprietary designs). Compatible with 3/32" chains standard on single-speed BMX drivetrains.

Ideal for BMX racing where gearing customization and weight reduction are performance priorities. The range of tooth counts allows riders to optimize their gear ratio based on track length, gate placement, rider size, and individual acceleration characteristics. Aluminum construction saves weight over steel chainrings, reducing rotating mass for quicker acceleration. Suitable for competitive racers running 104mm BCD cranks who want precise gearing control and lighter drivetrain components without sacrificing durability for race-level abuse.