Radio Cobalt Pro Bike (2021)
The cobalt line combines proven geometry and dialled components giving you the best start out of the gate during your first days racing. The cobalt line took off so much that we decided to add a pro size to the line-up allowing more riders to enjoy one of the best entry level race bikes on the market!
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 fully sealed front hubs and integrated headsets, making them simply unbeatable when comparing price to spec. The cobalt is one seriously unstoppable machine.
Frame - 6061 t6 alloy, forged dropouts with int. Chain tensioner
Fork - cr-mo, 1-1/8″ butted steerer tube, cr-mo fork legs, 30mm offset
Handlebar - 4130 seamless cr-mo
Grips - Radio, diamond knurling, closed end, flangeless, 130mm length
Stem - Radio, cobalt-toploader, ext. 50mm, alloy
Headset - FSA, no.28, integrated headset, sealed, 1-1/8″
Brake lever - Promax “xl-378” alloy brake rear
Brake - Promax “tx-117” alloy brake rear
Crank - Radio “cobalt” forged alloy 3pc crank, 175mm long
BB - Radio, bsa square taper, sealed
Pedals - Radio, cobalt pro, alloy
Chain - KMC, z6, 1/2″ x 3/32″
Sprocket - Radio alloy, 44t sprocket
Driver - ATA, 16t, 1/2″ x 3/32″, cr-mo
Front hub - Radio, cobalt, alloy cnc, fully sealed, 32t, 3/8″ cr-mo axle
Rear hub - Radio, cobalt, alloy cnc, fully sealed, 32t, flip flop, 3/8″ cr-mo axle
Rims - Radio, bx-32, double wall, 32h, alloy f&r
Seat - Radio cobalt pro, combo seat
Seat post - Radio 25.4mm alloy
Seat clamp - Radio, seat clamp, forged, alloy
Tires - Arisun, xlr8, front 20″x1.95″ / rear 20″x1.75″
Weight - 9.95kg/ 21.93lbs
Frame geometry
Top tube length - 20.75″
Chain stay length - 14″
Head tube angle - 73°
Seat tube angle - 72°
Bottom bracket height - 11.5″
Handlebar geometry
Rise - 7.5″
Width - 28″
Backsweep - 11°
Upsweep - 3.5°
