Radio Cobalt Expert Bike / Black / 19.5TT
Radio Cobalt Expert Bike / Metallic Yellow / 19.5TT
Radio Cobalt Expert Bike with a black seat, black handlebars, and black tires.
A light blue Radio Cobalt Expert Bike from Radio Raceline with black handlebars, black seat, and black tires is displayed on a white background.
Close-up of a teal-colored bicycle frame with the word "Radio Cobalt Expert Bike" on it, featuring black handlebars and brake cables, and a visible section of the front tire. This BMX race bike is perfect for those seeking an entry level ride to kickstart their racing journey.
Close-up of the front part of a teal BMX racing bike, showing the handlebars, brake cable, and the Radio Cobalt Expert Bike model name on the frame from Radio Raceline.
Close-up of a black bicycle seat mounted on a teal Radio Cobalt Expert Bike frame with tire partially visible.
Close-up of a teal bicycle's rear section, focusing on the brake system, wheel, and part of the saddle. This entry level Radio Cobalt Expert Bike offers excellent balance and durability for new riders.
Close-up image of the rear wheel and gear mechanism of a teal BMX race bike, showing the chain, spokes, tire, and frame from Radio Cobalt Expert Bike.

Radio Cobalt Expert Bike

Sale priceFrom

$899.99 AUD

Regular price$949.99 AUD

Or 4 payments of $224.99 AUD with

Pay in 4 interest-free payments

Recommended Rider Height:

130-170cm

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Radio Cobalt Expert Bike / Black / 19.5TT

Radio Cobalt Expert Bike / Black / 19.5TT

Sale price

$899.99 AUD

Regular price

RRP:

$949.99 AUD

Price match

RABK170-21-BLK

Sold Out

Radio Cobalt Expert Bike / Metallic Yellow / 19.5TT

Radio Cobalt Expert Bike / Metallic Yellow / 19.5TT

Sale price

$899.99 AUD

Regular price

RRP:

$949.99 AUD

Price match

RABK170-21-YEL

With Supplier

Radio Cobalt Expert Bike / Metallic Green / 19.5TT

Sale price$899.99 AUD

Price match

RABK170-21-GRN

With Supplier

Description

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: 19.5""
  • BB Height: 10.8""
  • Gearing: 42 x 16
  • Gear Ratio: 54.08""
  • Crank Length: 165mm
  • Weight: 8.95kg


 

Size 19.5TT
Frame 6061-T6 alloy frame, forged dropouts with int. chain tensioner
Fork CrMo fork, 1-1/8"" butted steerer, hi-ten fork legs, 23mm offset
Headset FSA ""No.28"" integrated headset, sealed, 1-1/8""
Stem Radio Raceline ""COBALT"" top loader stem, ext. 50mm, alloy
Handlebar 4130 CrMo bar, seamless
Grips Radio Raceline ""COBALT"" grips, diamond knurling, closed end, flangeless, 130mm length
Brake Lever Promax ""XL-378"" brake lever, rear
Rear Brake Promax ""MV-87"" brake, rear
Crank Radio Raceline ""COBALT"" 3pc crank, forged alloy, 165mm length
Chainring Radio Raceline sprocket, 42T, alloy
Bottom Bracket Radio Raceline BB, BSA square taper, sealed
Pedals Radio Raceline ""COBALT PRO"" pedal, alloy
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 1-3/8""
Seat Radio Raceline ""COBALT PRO"" combo seat
Seat Clamp Radio Raceline seat clamp, forged alloy
Seat Post Radio Raceline seat post, 25.4mm, alloy
Gearing / Ratio 42x16 / 54.08""


 
FRAME / BAR GEOMETRY
 
TOP TUBE LENGTH - 19.5''
CHAIN STAY LENGTH - 13.6''
HEAD TUBE ANGLE - 73°
SEAT TUBE ANGLE - 71°
BOTTOM BRACKET HEIGHT - 10.8""
 
BAR RISE - 5.75''
BAR WIDTH - 24.5''
BAR BACKSWEEP - 8°
BAR UPSWEEP - 2°

Specifications

FRAME / BAR GEOMETRY
 
TOP TUBE LENGTH - 19.5''
CHAIN STAY LENGTH - 13.6''
HEAD TUBE ANGLE - 73°
SEAT TUBE ANGLE - 71°
BOTTOM BRACKET HEIGHT - 10.8"
 
BAR RISE - 5.75''
BAR WIDTH - 24.5''
BAR BACKSWEEP - 8°
BAR UPSWEEP - 2°

 

Size 19.5TT
Frame 6061-T6 alloy frame, forged dropouts with int. chain tensioner
Fork CrMo fork, 1-1/8" butted steerer, hi-ten fork legs, 23mm offset
Headset FSA "No.28" integrated headset, sealed, 1-1/8"
Stem Radio Raceline "COBALT" top loader stem, ext. 50mm, alloy
Handlebar 4130 CrMo bar, seamless
Grips Radio Raceline "COBALT" grips, diamond knurling, closed end, flangeless, 130mm length
Brake Lever Promax "XL-378" brake lever, rear
Rear Brake Promax "MV-87" brake, rear
Crank Radio Raceline "COBALT" 3pc crank, forged alloy, 165mm length
Chainring Radio Raceline sprocket, 42T, alloy
Bottom Bracket Radio Raceline BB, BSA square taper, sealed
Pedals Radio Raceline "COBALT PRO" pedal, alloy
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 1-3/8"
Seat Radio Raceline "COBALT PRO" combo seat
Seat Clamp Radio Raceline seat clamp, forged alloy
Seat Post Radio Raceline seat post, 25.4mm, alloy
Gearing / Ratio 42x16 / 54.08"


 
FRAME / BAR GEOMETRY
 
TOP TUBE LENGTH - 19.5''
CHAIN STAY LENGTH - 13.6''
HEAD TUBE ANGLE - 73°
SEAT TUBE ANGLE - 71°
BOTTOM BRACKET HEIGHT - 10.8"
 
BAR RISE - 5.75''
BAR WIDTH - 24.5''
BAR BACKSWEEP - 8°
BAR UPSWEEP - 2°

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Radio Cobalt Expert Bike Features

Racing
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