The Helium Expert frame from RADIO RACELINE is a hydroformed aluminum BMX race frame for 20" x 1-3/8" expert-class wheels.

Features

• Hydroformed 6061 aluminum race frame
• Forged and CNC-machined dropouts with integrated chain tensioner bolts
• Removable V-brake mounts, disc brake compatible with the Helium Expert Disc Brake Mount

Specifications

• Material: Hydroformed 6061 aluminum
• Wheel size: 20" (451 mm) x 1-3/8"
• Head tube: 1" for integrated headset, 120 mm (4.72")
• Seat post: 22.2 mm
• Seat clamp: 25.4 mm ID
• Bottom bracket: BSA, 68 mm wide
• Dropouts: 10 mm (3/8") slots
• Brakes: Removable V-brake mounts (77 mm pivot-to-pivot); disc brake compatible with optional mount
• Colors: Black, Metallic Ocean Blue, Galactic Ice Purple
• Weight: 1,540 g

Geometry

• Top tube: 19.5" (495 mm)
• Chainstay (min.): 13" (330 mm)
• Rider area: 19" (483.5 mm)
• Head tube angle: 73.5°
• Seat tube angle: 71°
• BB height: 10.8" (274 mm)
• Seat tube height: 8.42" (214 mm)