System Mini/Junior Bicycle Fork

Product Overview

The System Mini/Junior Bicycle Fork is a chromoly racing fork designed for smaller 20" wheels and junior riders. Built for responsive handling and durability, it accommodates standard Mini/Junior wheel sizes. The threadless steerer tube with modern geometry suits contemporary BMX frames and integrated headsets.

Key Features

• Chromoly construction – Durable steel alloy provides strength and responsive handling for racing and trick applications. Chromoly resists bending under impacts while maintaining light weight compared to heavier steel alternatives.

• 1" (25.4mm) threadless steerer tube – Modern threadless design works with integrated headsets for simplified assembly and reduced play. 1" diameter fits Mini/Junior frame geometry without special adapters.

• 4.75" (122mm) steerer length – Adequate length accommodates standard frame and headset configurations. Supports integration with contemporary Mini/Junior frame designs.

• 20" wheel compatibility – Designed specifically for 20x1-1/8" or 20x1-3/8" tires. Geometry optimized for Mini/Junior wheel sizes and proportional riding.

• 100mm hub spacing – Standard BMX front hub spacing fits conventional wheel builds without special configurations.

• 313mm axle to crown length – Precise geometry positioning maintains frame geometry and handling characteristics. Standard measurement ensures compatibility with Mini/Junior frame designs.

• 27mm bottom race OD – Standard bearing race sizing works with conventional integrated headsets and fork design.

• Lightweight at 1 lb 10 oz – Minimal rotational mass improves acceleration and maneuverability for junior riders. Light fork reduces overall bike weight for improved handling.

• Racing-focused design – Geometry and construction optimized for Mini/Junior BMX racing applications. Responsive handling supports competitive performance at junior level.

Technical Specifications

• Material: Chromoly steel
• Steerer tube: 1" (25.4mm) threadless
• Steerer length: 4.75" (122mm)
• Wheel size: 20x1-1/8" or 20x1-3/8"
• Hub spacing: 100mm
• Axle to crown: 313mm
• Bottom race OD: 27mm
• Weight: 1 lb 10 oz
• Intended use: Mini/Junior BMX racing

Compatibility and Ideal Use Cases

Compatible with:

• Mini/Junior BMX frames with 1" threadless steerer tubes
• Integrated headsets with 27mm bottom race OD
• 20x1-1/8" or 20x1-3/8" wheel sizes
• Standard BMX brake and drivetrain systems
• 100mm front hub spacing

Ideal for:

• Mini/Junior BMX racing and competitive riding
• Younger and smaller riders transitioning to full-size components
• Racing-focused Mini/Junior builds prioritizing responsive geometry
• Replacement forks on existing Mini/Junior frames
• Any Mini/Junior BMX discipline requiring lightweight, durable fork performance