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2024 RADIO

COBALT EXPERT

A 20″ aluminum frame bmx bike with promax rim brakes.
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Weight19.7 lbs  
FrameAluminum
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
BrakesPromax Rim
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Insights
Sizing
One Size

3'11" +

🐐 Estimated

Rider Fit Notes

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Geometry
Specs
Build
Frame

6061 T6 alloy, forged dropouts with int. chain tensioner

BB StandardBSA, Threaded

ColorsBlack; Metallic Green

Fork

cr-mo, 1-1/8″ butted steerer tube, hi-ten fork legs, 23mm offset

Bottom Bracket

Radio, BSA square taper, sealed

Headset

FSA, No.28, integrated headset, sealed, 1-1/8″

Stem

Radio, Cobalt-toploader, ext. 50mm, alloy

Handlebar

4130 seamless cr-mo

Saddle

Radio Cobalt Pro, combo seat

Seatpost

Radio 25.4mm alloy

TypeRigid

Pedals

Radio, Cobalt Pro, alloy

Grips

Radio, diamond knurling, closed end, flangeless, 130mm length

Groupset
Crank

RADIO “Cobalt” forged alloy 3pc crank, 165mm long

Cassette

RADIO alloy, 42t sprocket

Chain

KMC, Z6, 1/2″ x 3/32″

Brakes

PROMAX “MV-87” alloy brake rear

TypePromax Rim

Brake Levers

PROMAX “XL-378” alloy brake rear

Wheels
Rims

Radio, A-M5, double wall, 28H, alloy f&r

Front Hub

RADIO “Cobalt” alloy CNC hub, fully sealed, 3/8″s, 28h, crmo axle

Rear Hub

RADIO “Cobalt” alloy CNC hub, fully sealed, 3/8″s, crmo axle, 28h, flip flop

Tires

Arisun, XLR8, 20″x 1-3/8″

Rider Notes
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First added July 17

Last updated September 21

Not listed for 615 days