Radio Asura 26-inch dirt-jump bike, 22.7-inch TT — compare the geometry and set up your ride:

Key features

• Suggested rider height: Approx. over 155 cm
• Suggested age: Approx. 13+
• Top tube length (TT / A): 22.7 in
• Wheel size: 26 in
• Fork: RST Dirt RA, 100 mm travel
• Bar: 740 mm width, 50 mm rise, 31.8 mm clamp

The Asura is a single-speed 26-inch bike for dirt jumps and pumptracks. A 100 mm RST Dirt RA suspension fork helps absorb impacts from the ground, while cable-operated Tektro Aries disc brakes let you manage speed before the next feature.

Focus on the rhythm of a run

The 30T sprocket and 14T freewheel give you one gear to work with. On a pumptrack, you can concentrate on body position, pumping and your chosen line without changing gears.

The frame has chromoly top and down tubes, with the remaining tubes made from 1020 Hi-Ten steel. Radio Pro tubular cranks and double-wall Radio DB32 rims come fitted. Check the brake pads and cable adjustment regularly.

Use the sizing guide as a starting point

The supplied Radio guide suggests a height above 155 cm and age 13+ for 26-inch dirt bikes with 21–23-inch top tubes. The Asura has a 22.7-inch top tube. Compare your reach and freedom of movement too; this range does not replace checking the individual fit.

Compare the geometry

The top tube measures 22.7 inches, while the wheels are 26 inches. Compare the chainstay length, head angle, bottom bracket drop and bar dimensions with your preferred setup. Bottom bracket drop is a separate measurement from height above the ground.

Before your first ride

The bike is supplied around 90% assembled. Fit the pedals, handlebars and any other supplied parts, including the front wheel where required, then check the complete bike before riding. Have the assembly and initial inspection carried out by a professional bike workshop. This is an additional paid service; read the warranty supplied with the bike and keep the service receipt and any required confirmation.

Checks for dirt-jump riding

Jumps, impacts and landings put high loads through the frame, fork, wheels and other components. No dirt-jump bike is indestructible. Check for loose fittings, cracks, damage and worn parts before every ride, and stop riding if anything is loose or damaged. Follow the bike and component manufacturers’ maintenance intervals.

Wear a suitable helmet and protective gear. Start with features suited to your ability and stay within the bike’s intended use. For assembly and servicing guidance, read our important information before buying and using a bike. Your statutory consumer rights remain separate from the manufacturer’s warranty.

Radio Asura 26-inch dirt-jump bike, 22.7-inch TT — specifications:

Frame geometry:

• Top tube length (TT / A): 22.7 in
• Chainstay length (CS / B): 15.5 in
• Head tube angle (HA / C): 70°
• Seat tube angle (SA / D): 72.5°
• Bottom bracket drop: 4 mm
• Standover height (SO / F): 10.5 in

Sizing, weight and other details:

• Wheel size: 26 in
• Weight: 14.04 kg
• Suggested rider height: Approx. over 155 cm
• Suggested age: Approx. 13+

Fork:

• Fork: RST Dirt RA, 100 mm travel

Handlebars:

• Bar: 740 mm width, 50 mm rise, 31.8 mm clamp
• Handlebar: Radio Asura, 6061-T6 aluminium; backsweep: 8°; upsweep: 3°

Cranks:

• Cranks: Radio Pro, three-piece tubular chromoly, 170 mm, 8-spline

Frame:

• Frame: Radio Asura, chromoly top tube and down tube; other tubing: 1020 Hi-Ten steel

Stem:

• Stem: Radio Zoom, aluminium, front load, 40 mm reach

Headset:

• Headset: FSA No.28 A-headset

Wheels and rims:

• Rims: Radio DB32, 26 in, double wall

Tyres:

• Tyres: Radio DJ1131, front and rear, 2.0 in wide

Chainring or sprocket:

• Sprocket: Radio Rookie, steel, 30T

Front hub:

• Front hub: Radio Rookie-DJ, aluminium, 3/8 in chromoly axle, 32H, loose ball bearings

Rear hub and driver:

• Rear hub: Radio Rookie-DJ, aluminium, 3/8 in chromoly axle, 32H, sealed bearings

Bottom bracket:

• Bottom bracket: Radio Mid, press fit, sealed bearings

Chain:

• Chain: Salt AM, WZ1

Brakes and controls:

• Brakes: Tektro Aries mechanical disc, front and rear, 160 mm rotors

Saddle and seatpost:

• Saddle: Radio DJ Combo, medium padding
• Seat clamp: Radio Slim, aluminium

Pedals:

• Pedals: Radio Slim, nylon/fibreglass

Grips and bar ends:

• Grips: Radio Frequency XL, flangeless, 160 mm

Drivetrain:

• Freewheel: ATA, chromoly, 14T

Brake levers:

• Brake levers: Tektro RS-360A, front and rear