Radio Race COBALT PRO 20 Complete Bike

The Radio Bikes Race Cobalt Pro Complete BMX Bike 20" is a lightweight and durable BMX race bike designed for entry-level riders seeking speed, stiffness, and reliable race performance. Built around a 6061-T6 aluminium frame with forged dropouts and an integrated chain tensioner, it combines responsive handling with race-ready components and a strong chromoly cockpit setup.

Highlights

• Lightweight 6061-T6 aluminium race frame
• Chromoly fork and 4130 chromoly handlebar for added strength
• Integrated chain tensioner with forged dropouts
• Rear-only Promax mechanical braking system
• Double wall aluminium rims for improved durability
• Sealed hubs and bottom bracket for smooth performance
• Race-ready 20" wheel setup with Arisun XLR8 tires

Frame & Fork

• Frame: 6061-T6 alloy with forged dropouts and integrated chain tensioner
• Fork: Chromoly fork with hi-ten fork legs
• Steerer Tube: 1-1/8" butted
• Fork Offset: 30 mm

Cockpit Components

• Handlebar: 4130 chromoly, seamless construction
• Grips: Radio Raceline “COBALT”, diamond knurling, flangeless, 130 mm
• Stem: Radio Raceline “COBALT” aluminium toploader, 50 mm reach
• Headset: FSA No.28 integrated, sealed, 1-1/8"

Drivetrain

• Crankset: Radio Raceline COBALT forged aluminium, 3-piece, 175 mm
• Bottom Bracket: Radio Raceline BSA square taper, sealed
• Chain: KMC Z6, 1/2" x 3/32"
• Sprocket: Radio Raceline aluminium, 44T
• Freewheel: ATA 16T chromoly

Braking System

• Brake Lever: Promax XL-378 rear lever
• Brake: Promax TX-117 mechanical rear brake only

Wheelset & Tires

• Front Hub: Radio Raceline COBALT CNC aluminium, sealed, 36H
• Rear Hub: Radio Raceline COBALT CNC aluminium, sealed, flip-flop, 36H
• Rims: Radio Raceline BX-32 double wall aluminium rims
• Tires: Arisun XLR8 20x1.95"/1.75"

Seat & Finishing Kit

• Seat: Radio Raceline COBALT PRO combo seat
• Seatpost: Radio Raceline 25.4 mm aluminium
• Seat Clamp: Radio Raceline forged aluminium
• Pedals: Radio Raceline COBALT PRO aluminium

Specifications

• Wheel Size: 20"
• Bike Weight: Approx. 9.95 kg
• Riding Style: BMX Race
• Brake Setup: Rear brake only
• Intended Use: Entry-level BMX racing