RADIO RACELINE Helium Expert XL 2025 Frame

The Helium Frame took the race world by storm when it was released almost 5 years ago. With multiple World Championship wins, the Helium Frame is now a common site on tracks across the globe.

Features:
• Super lightweight alloy race frame
• Hydroformed 6061 alloy tubing
• Forged & CNC machined dropouts
• Forged and CNC machined Sliding Dropout Disc System (SDDS) with integrated chain tensioner
• Flat mount disc brake (with internal cable routing) and v-brakes (external routing)
• 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)
• integrated chain tensioner bolts
• for 20” (406mm) x 1.5” tyres

Specifications:
Toptube Length: 20.5” (521mm)
Chain Stay Length (Min): 13.2” (335mm)
Rider Area: 20.7" (526.6mm)
Head Tube Angle: 73.5°
Seat Tube Angle: 71°
BB Height: 10.8" (274mm)
Seat Tube Height: 8.42" (215mm)
Wheel Size: 20" X 1.4"
Head Tube Size: 1-1/8" for integrated headset
Seat Post Size: 22.2mm
Seat Clamp Size: for 25.4mm ID seat clamp
Tubing: Hydroformed 6061 alloy
Bottom Bracket: BSA, 68mm wide
Head Tube: 4.72" (120mm)
Dropouts: Sliding dropout disc system (SDDS) for 10 & 15mm axles (includes all hardware)
Brakes: Flat mount disc brake or v-brake mounts (removable), 77mm pivot-to-pivot,
Weight: 1.59kg (3.5lbs)