Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Radio
2021 Radio Cobalt Junior
Previous used estimate
$186 - $192
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Radio Cobalt Junior
12-month projected trend
12%
Direction and magnitude, not judgment
vs. category average
5%
Drops faster than category avg
Price over time - 2021 Radio Cobalt Junior
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Cobalt model years
Compare Cobalt Junior models
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Overview
About this bike
The Cobalt line combines proven geometry and dialed components, giving you the best start out of the gate during your first days racing. The Cobalt Junior steps up in size without packing on the pounds. At only 8kg, this is one of the lightest junior entry-level bikes out there. Fresh out of the box with incredible new paint and graphics, you'll be able to spot a Cobalt on the track very easily. All Cobalt bikes now feature fully sealed front hubs and integrated headsets, making them simply unbeatable when comparing price to spec. The Cobalt is one seriously unstoppable machine.
Specifications
- Subtype
- BMX
- Category
- BMX
- Component Fork
- Cr-mo, 1" butted steerer tube, hi-ten fork legs, 23mm offset
- Component Hubs
- Front: RADIO Cobalt alloy CNC hub, fully sealed, 3/8", 28h, crmo axle Rear: RADIO Cobalt alloy CNC hub, fully sealed, 3/8", crmo axle, 28h, flip flop
- Component Rims
- Radio, A-M5, double wall, 28H, alloy F&R
- Component Size
- 18.5-inch
- Component Stem
- Radio, Cobalt top-loader, ext. 40mm, alloy
- Product Family
- Cobalt
- Component Chain
- KMC, Z6, 1/2" x 3/32"
- Component Color
- Black
- Component Frame
- 6061 T6 alloy, forged dropouts with int. chain tensioner
- Component Brakes
- PROMAX MV-87 alloy brake rear
- Component Pedals
- Radio, Cobalt Junior, nylon
- Component Saddle
- RADIO Mini combo seat
- Component Headset
- Radio, integrated headset, sealed, 1"
- Component Crankset
- RADIO Cobalt forged alloy 3pc crank, 155mm long
- Component Seatpost
- Radio 22.2mm alloy
- Component Handlebar
- 4130 seamless cr-mo
- Component Rear Tire
- Arisun, XLR8, 20 x 1-1/8"
- Component Chainrings
- RADIO alloy, 40t sprocket
- Component Front Tire
- Arisun, XLR8, 20 x 1-1/8"
- Component Tape Grips
- Radio, diamond knurling, closed end, flangeless, 130mm length
- Component Brake Levers
- PROMAX XL-378 alloy
- Component Bottom Bracket
- Radio, BSA square taper, sealed
- Component Cassette Freewheel
- ATA, 16T, 1/2" x 3/32", cr-mo
- Hubs
- Front: RADIO Cobalt alloy CNC hub, fully sealed, 3/8", 28h, crmo axle Rear: RADIO Cobalt alloy CNC hub, fully sealed, 3/8", crmo axle, 28h, flip flop
- Rims
- Radio, A-M5, double wall, 28H, alloy F&R
- Crankset
- RADIO Cobalt forged alloy 3pc crank, 155mm long
- Pedals
- Radio, Cobalt Junior, nylon
- Bottom Bracket
- Radio, BSA square taper, sealed
- Chain
- KMC, Z6, 1/2" x 3/32"
- Seatpost
- Radio 22.2mm alloy
- Saddle
- RADIO Mini combo seat
- Handlebar
- 4130 seamless cr-mo
- Headset
- Radio, integrated headset, sealed, 1"
- Rear Tire
- Arisun, XLR8, 20 x 1-1/8"
- Stem
- Radio, Cobalt top-loader, ext. 40mm, alloy
- Brake Levers
- PROMAX XL-378 alloy
- Brakes
- PROMAX MV-87 alloy brake rear
- Chainrings
- RADIO alloy, 40t sprocket
- Fork
- Cr-mo, 1" butted steerer tube, hi-ten fork legs, 23mm offset
- Frame
- 6061 T6 alloy, forged dropouts with int. chain tensioner
- Tape/Grips
- Radio, diamond knurling, closed end, flangeless, 130mm length
- Color
- Black
- Size
- 18.5-inch
- Cassette/Freewheel
- ATA, 16T, 1/2" x 3/32", cr-mo
- Front Tire
- Arisun, XLR8, 20 x 1-1/8"
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.