The Radio Cobalt Junior BMX Race Bike-Black at J&R Bicycles delivers a powerful combination of time-tested geometry and precisely tuned components. This bike is a step up in size yet remains super lightweight at just 8.07kg/ 17.78lbs making it one of the lightest entry-level junior BMX bikes available. With a fresh makeover boasting striking new paint and graphics, spotting a Cobalt on the track is a breeze. Not to mention, all Cobalt bikes now come equipped with fully sealed front hubs and integrated headsets, so you get pro-level performance without the elite price tag. The Cobalt is an unstoppable force ready to conquer any racecourse.

SPECIFICATIONS

• FRAME: 6061 T6 alloy, forged dropouts with int. chain tensioner
• FORK: cr-mo, 1″ butted steerer tube, hi-ten fork legs, 23mm offset
• HANDLEBAR: 4130 seamless cr-mo
• GRIPS: Radio, diamond knurling, closed end, flangeless, 130mm length
• STEM: Radio, Cobalt-toploader, ext. 40mm, alloy
• HEADSET: Radio, integrated headset, sealed, 1″
• BRAKE LEVER: PROMAX XL-378 alloy brake rear
• BRAKE: PROMAX MV-87 alloy brake rear
• CRANK: RADIO Cobalt forged alloy 3pc crank, 155mm long
• BB: Radio, BSA square taper, sealed
• PEDALS: Radio, Cobalt Junior, nylon
• CHAIN: KMC, Z6, 1/2″ x 3/32″
• SPROCKET: RADIO alloy, 40t sprocket
• DRIVER: ATA, 16T, 1/2″ x 3/32″, cr-mo
• FRONT HUB: RADIO Cobalt alloy CNC hub, fully sealed, 3/8″s, 28h, crmo axle
• REAR HUB: RADIO Cobalt alloy CNC hub, fully sealed, 3/8″s, crmo axle, 28h, flip flop
• RIMS: Radio, A-M5, double wall, 28H, alloy f&r
• SEAT: RADIO Mini combo seat
• SEAT POST: Radio 22.2mm alloy
• SEAT CLAMP: Radio slim alloy seat clamp
• TIRES: Arisun, XLR8, 20″x 1-1/8″
• WEIGHT: 8.07kg/ 17.78lbs

GEOMETRY

• TOP TUBE LENGTH: 18.5″
• CHAIN STAY LENGTH: 12.85″
• HEAD TUBE ANGLE: 73
• SEAT TUBE ANGLE: 71
• BOTTOM BRACKET HEIGHT: 10.4″
• RISE: 4.25″
• WIDTH: 24″
• BACKSWEEP: 8
• UPSWEEP: 2