Radio Race QUARTZ PRO XXXXL Frame

The Quartz Pro XXXXL Frame is a world championship-winning BMX frame, now redesigned with a cutting-edge disc brake system and the innovative Sliding Dropout Disc System (SDDS). Built from hydroformed 6061 alloy with Paradigm tubing, this ultra-lightweight frame delivers exceptional strength, responsiveness, and progressive geometry for modern riding styles.

Key Features

• Disc-brake-specific frame with internal cable routing
• Forged and CNC-machined Sliding Dropout Disc System (SDDS)
• Integrated chain tensioner for precise setup
• Super lightweight hydroformed 6061 alloy construction
• Proven championship-winning geometry with 10 world titles
• Flat mount disc brake compatible only
• Designed for 140mm and 120mm rotor setups
• Paradigm superior tubing for maximum stiffness and durability

Frame Specifications

• Color: Black / Spectral Space Green / Spectral Abyss Purple
• Top Tube Length: 22.5" (572mm)
• Chain Stay Length: 15.2" (386mm)
• Rider Area: 570.9mm
• Head Tube Angle: 74°
• Seat Tube Angle: 71°
• BB Height: 11.6" (294.64mm)
• Seat Tube Height: 9.1" (231mm)
• Wheel Size: 20" x 1.75”
• Head Tube Size: Tapered 1-1/8” - 1.5” integrated
• Seat Post Size: 27.2mm
• Seat Clamp Size: 31.8mm ID
• Bottom Bracket: BSA, 68mm wide
• Head Tube Length: 4.9" (125mm)
• Dropouts: SDDS for 10mm & 15mm axles
• Brake Compatibility: Flat mount disc only
• Weight: 1.78kg (3.92lbs)

Performance Details

• Optimized for modern BMX race performance
• Progressive geometry for enhanced control and stability
• Internal routing keeps the setup clean and protected
• Lightweight design improves acceleration and handling
• Compatible with advanced disc brake systems for superior stopping power