Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
Radio Race Cobalt Mini BMX Race BikeThe Cobalt line combines proven geometry and dialled components giving you the best start out of the gate during the first days racing. The Cobalt Mini is Radio's pint sized machine, scaled down and lighter build kit make this thing unrivalled out there on the track. All Cobalt bikes feature fully sealed front hubs and integrated headsets, making them simply unstoppale when comparing price to spec. ###section### Product Specs FRAME MATERIAL: 6061 T6
The Cobalt line combines proven geometry and dialled components giving you the best start out of the gate during the first days racing. The Cobalt Mini is Radio's pint sized machine, scaled down and lighter build kit make this thing unrivalled out there on the track. All Cobalt bikes feature fully sealed front hubs and integrated headsets, making them simply unstoppale when comparing price to spec.###section###
Product Specs
- FRAME MATERIAL: 6061 T6 alloy
- WHEEL SIZE: 20"
- TOP TUBE LENGTH: 17.5"
- CHAIN STAY LENGTH: 13.1"
- HEAD TUBE ANGLE: 72°
- SEAT TUBE ANGLE: 70°
- FORKS: cr-mo, 1″ butted steerer tube, hi-ten fork legs, 23mm offset
- BARS: 4131 seamless cr-mo
- STEM: Radio, Cobalt-toploader, ext. 40mm, alloy
- HEADSET: Radio, integrated headset, sealed, 1″
- BRAKE MOUNTS: Welded
- BRAKES: PROMAX “MV-87” alloy brake rear
- FRONT HUB: RADIO “Cobalt” alloy CNC hub, fully sealed, 3/8″s, 28h, crmo axle
- FRONT RIM: Radio, A-M5, double wall, 28H, alloy
- REAR HUB: RADIO “Cobalt” alloy CNC hub, fully sealed, 3/8″s, crmo axle, 28h, flip flop
- REAR RIM: Radio, A-M5, double wall, 28H, alloy
- TYRES: Arisun, XLR8, 20″x 1-1/8″
- SPROCKET: RADIO alloy, 38t sprocket
- CRANKS: RADIO “Cobalt” forged alloy 3pc crank, 140mm long
- BB: Radio, BSA square taper, sealed
- PEDALS: Radio, Cobalt Junior, nylon
- SEAT: RADIO “Mini” combo seat
- GEARING: 38/16
- WEIGHT: 7.79kg/ 17.18lbs
###section###
Product Highlights
- Junior sized BMX bike. Designed for the needs of racers who are 4ft 6" - 5ft 1" (138cm - 155cm)
- A BMX race specific bike great for those riders just getting started
- Strong and lightweight construction
- Sealed bearings throughout
- Integrated headset
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 212 reviews
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Product Reviews
★★★★★ 4
Good chair and great value, comfortable
Color: Dark Black, Style: pack of 1, Color: Dark Black, Style: pack of 1
The chair is as you expect for this price range
The only Issue is the thigh length is shorter then I thought but still works. The air fabric helps
Keeps it cool to sit in for long periods without sweating
It’s a great chair to sit in for 8 hours as I usually do writing and project planning at my desk.
Over all the assembly was simple and all
The instructions were there with the tools as well.
It rolls fine on my vinyl floor. It’s definitely value for your money on this one and the over all design is fine and works to me at this point.
It don’t have squeaky tires so the noise is good rolling around
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Reviewed in the United States on January 28, 2026
★★★★★ 5
Great value
Color: Red, Style: pack of 1, Color: Red, Style: pack of 1
Easy to put together. Only tough part was getting the wheels on, needed someone strong to attach them. Once together it is a great chair. Height adjusts up and down easily and rolls smoothly. Sturdy chair and the red looks great!
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Reviewed in the United States on June 11, 2026
★★★★★ 5
Reasonably comfortable, price is good, you get what you pay for
Color: Black, Style: pack of 1
Easy enough to put together, moderately comfortable (though I wouldn't want to sit in it for more than a couple hours). Heads and shoulders above the other similar-looking chairs on this site. If you want a cheap chair with arms, this is pretty much the best combination of cheap and reasonably comfortable. I am using it with a spare desk/workstation, and it's fine. In fact, I plan to buy another one.
Recline is good (make sure to loosen the twisty thing. Rolls fine. Feels study enough for me. I'm 5'10", 185 lbs, and my husband is 5'9", 215lbs, and both of us feel like the chair is roomy and durable. Certainly worth it for the price.
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Reviewed in the United States on April 15, 2026
★★★★★ 3
Priced right
Color: Black, Style: pack of 1
I got this chair for the price and wanted to try something with a vented design. The instructions are simple with pictures only but seemed to work.
Pros: Decent price. Fairly good fit and finish. Assembly was easy with an exception. You get extra screw bolts. Screws appear to have Loctite.
Cons: The arm rests were extremely difficult to attach to the seat. 4 bolts. The threaded bolt holes in the seat cushion did not line up well with the holes in the arm rest even though the arm rest holes were slotted. It took major tweaking. The angles of the chair made it even more difficult to assemble unless you built a custom work bench. You get an Allen key but I used a ratcheting screw driver.
The 5 wheel base that the chair sits on required partial assembly. It comes with 4 of the arms attached as one piece normally but the 5th arm needs to be attached in sort of a keyed design. You'll need a mallet. My first thought was why? The only reason I came up with was it allows for a smaller shipping box. Smaller boxes equal more chairs shipped on the same ship from Vietnam. In any case it is a con since IMO it creates a stress point that could snap. The wheels are small and plastic. I used a set of "roller blade" style office chair wheels I already had.
It has adjustments for elevation and tilt. My wife sat in it and she says it's comfortable in her sewing room so I'm happy. Of course time will tell.
Three stars for the assembly issues. Overall: Good deal for a not so expensive chair
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Reviewed in the United States on April 28, 2026
★★★★★ 5
highly recommend
Color: Peach Pink, Style: pack of 1, Color: Peach Pink, Style: pack of 1
This chair exceeded my expectations! It was easy to assemble, feels sturdy, and is very comfortable for long hours of work or studying. The lumbar support is great, and the chair rolls and swivels smoothly. The pink color is super cute and looks exactly like the pictures. Great value for the price — highly recommend!
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Reviewed in the United States on May 23, 2026
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