Radio Bikes Cobalt Complete BMX
What the checker saysnot checked
No fit check runs on a complete bike, and we will not pretend one does. A complete bike does not fill a slot in the builder, so the checker has no counterpart to compare it against and has never produced a single sentence about one.
$623.85 to $693.17 MSRP·7620 to 9780 g
What the maker states
- Wheel size
- Built for a 20" wheel
- Top tube
- Ranges from 17.5" to 21.25" (5 distinct values, across 5 of 5 variants)
- Rear axle
- 10mm
- Rear brake mount
- V-brake
- Driver type
- Driver freewheel
- Driver teeth
- Driver 16 teeth
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
5 verified variants
| Variant | Top tube | Size class | Head tube | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|---|---|
| Cobalt Mini | 17.5" | mini | integrated-1 | $646.96 | 7730 g | maker’s page | 2026-08-10 | Build with this |
| Cobalt Junior | 18.5" | junior | integrated-1 | $623.85 | 7620 g | maker’s page | 2026-08-10 | Build with this |
| Cobalt Expert | 19.5" | expert | integrated-1-1/8 | $681.62 | 8820 g | maker’s page | 2026-08-10 | Build with this |
| Cobalt Pro | 20.75" | pro | integrated-1-1/8 | $670.06 | 9780 g | maker’s page | 2026-08-10 | Build with this |
| Cobalt Pro XL | 21.25" | pro-xl | integrated-1-1/8 | $693.17 | 9780 g | maker’s page | 2026-08-10 | Build with this |
What the maker states11 stated·4 not published
- Built for a 20" wheel.
- Top tube ranges from 17.5" to 21.25" (5 distinct values, across 5 of 5 variants).
- Rear axle 10mm.
- Rear brake mount v-brake.
- Driver freewheel.
- Driver 16 teeth.
- 3-piece cranks.
- Size class expert (on 1 of 5 variants); Size class junior (on 1 of 5 variants); Size class mini (on 1 of 5 variants); Size class pro (on 1 of 5 variants); and 1 further value across 1 of 5 variants.
- Head tube integrated-1-1/8 (on 3 of 5 variants); Head tube integrated-1 (on 2 of 5 variants).
- Sprocket 44 teeth (on 2 of 5 variants); Sprocket 38 teeth (on 1 of 5 variants); Sprocket 40 teeth (on 1 of 5 variants); Sprocket 42 teeth (on 1 of 5 variants).
- Tire width 1.125 (on 2 of 5 variants); Tire width 1.375 (on 1 of 5 variants).
4 further fields the checker looks for are not published by Radio Bikes, so we leave them blank rather than estimate them, and those 4 checks stay silent on this complete bmx. They are bottom bracket shell, seat system, front brake mount and spindle diameter. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-08-10.