For 2021, Radio Raceline has continued its upwards trajectory in the ""ready to race"" category of complete off-the-shelf race bikes. Every one of their bikes in the Cobalt range can go from the shop to the podium with ease, and is the perfect entry level race bike for your young rider.
This beast is stacked full of loads of epic Radio parts to ensure a ride like no other! Radio Raceline Cobalt Grips provide loads of grip for your hands, The Radio Raceline Cobalt Hubs laced up to double walled Radio Raceline A-M5 Rims, which means they can take a beating you shredder starts to send the jumpks. After all, every BMX kids just wants to jump stuff, and this bike will take that punishment as they learn the ropes of BMX racing.
Fresh out of the box for 2021 with incredible new paint and graphics, you’ll be able to spot a cobalt on the track very easily. All Cobalt bikes now feature full sealed front hubs and integrated headsets, making them simply unbeatable when comparing price to spec. the cobalt is one seriously unstoppable machine.
We sell loads of these complete race bikes, and for good reason, awesome build quality at this price point makes them extremely great value and will last a season or two before your racer grows into the next size.
Key Specs:
- TT Length: 17.5""
- BB Height: 10.4""
- Gearing: 40 x 16
- Gear Ratio: 49.75""
- Crank Length: 140mm
- Tyres: 20 x 1-1/8
- Weight: 7.79kg
| Size | 17.5TT |
| Frame | 6061-T6 alloy frame, forged dropouts with int. chain tensioner |
| Fork | Cr-Mo, 1″ butted steerer tube, hi-ten fork legs, 23mm offset |
| Headset | FSA "No.28" integrated headset, sealed, 1" |
| Stem | Radio Raceline "COBALT" top loader stem, ext. 40mm, alloy |
| Handlebar | 4130 CrMo bar, seamless |
| Grips | Radio Raceline "COBALT" grips, diamond knurling, closed end, flangeless, 102mm length |
| Brake Lever | Promax "XL-378" brake lever, rear |
| Rear Brake | Promax "MV-87" brake, rear |
| Crank | Radio Raceline "COBALT" 3pc crank, forged alloy, 140mm length |
| Chainring | Radio sprocket, 38T, alloy |
| Bottom Bracket | Radio Raceline BB, BSA square taper, sealed |
| Pedals | Radio Raceline Junior, nylon |
| Chain | KMC "Z6" chain, 1/2" x 3/32" |
| Front Hub | Radio Raceline "COBALT" front hub, alloy cnc, fully sealed, 28H, 3/8"" crmo axle |
| Rear Hub | Radio Raceline "COBALT" rear hub, alloy cnc, fully sealed, 28H, flip flop, 3/8" crmo axle |
| Rear Cog | ATA freewheel, 16T, 1/2" x 3/32", crmo |
| Rims | Radio Raceline "A-M5" rim, double wall, 28H, alloy |
| Spokes | Radio Raceline "A-M5" rim, double wall, 28H, alloy |
| Tyres | Arisun "XLR8" TYREs, 20" x 1-1/8" |
| Seat | Radio “Mini” combo seat |
| Seat Clamp | Radio slim alloy seat clamp |
| Seat Post | Radio seat post, 25.4mm, alloy |
| Gearing / Ratio | 38x16 / 49.75" |
FRAME / BAR GEOMETRY
FRAME GEOMETRY
TOP TUBE LENGTH 17.5″
CHAIN STAY LENGTH 13.1″
HEAD TUBE ANGLE 72°
SEAT TUBE ANGLE 70°
BOTTOM BRACKET HEIGHT 10.5″
HANDLEBAR GEOMETRY
RISE 2.25″
WIDTH 22.5″
BACKSWEEP 8°
UPSWEEP 2°
