Our world championship-winning Quartz Frame is now available in a brand-new disc version, premiering our Sliding Dropout Disc System (SDDS). Utilizing a flat mount style calliper and internal cable routing for the best possible braking system; with this huge upgrade, the Quartz is now one of the lightest and most progressive alloy frames on the market!

Color: Black / Spectral Space Green / Spectral Abyss Purple
Toptube Length: 21.75” (552mm)
Chain Stay Length: 14.8” (376mm)
Rider Area: 551.9mm
Head Tube Angle: 74°
Seat Tube Angle: 71°
BB Height: 11.6" (294.64mm)
Seat Tube Height: 9.1" (231mm)
Wheel Size: 20" (406mm) x 1.75”
Head Tube Size: tapered 1-1/8” - 1.5” for integrated headset
Seat Post Size: 27.2mm
Seat Clamp Size: for 31.8mm ID seat clamp
Tubing: Hydroformed 6061 alloy, Paradigm tubing
Bottom Bracket: BSA, 68mm wide
Head Tube: 4.9" (125mm)
Dropouts: sliding dropout disc system (SDDS) for 10 & 15mm axles (includes all hardware)
Brakes: flat mount disc brake only (not compatible with v-brakes)
Weight: 1.76kg (3.88lbs)

Features:
• NEW disc-brake-specific model with internal cable routing
• forged and CNC machined Sliding Dropout Disc System (SDDS) with integrated chain tensioner
• super lightweight alloy frame
• x10 world championship wins
• Paradigm superior tubing
• flat mount disc brake only (not compatible with v-brakes)
• Designed for 140mm and 120mm rotors (please check 120mm rotor fitment with an authorised Radio Bikes dealer based on your hub and brake calliper dimensions)