Dartmoor Hornet Junior 24-inch junior mountain bike — simple gear changes for your time on the trails:

Key features

• Wheel sizes: 24 in
• Fork: RST Alex, 100 mm travel
• Drivetrain: Microshift Acolyte 1 x 8
• Brakes: Tektro HD-J2820 hydraulic, 160 mm rotors
• Frame sizes: One size
• Seatpost: Fixed aluminium post
• Weight: Approx. 13.10 kg

Controls for a younger rider

Compare the 155 mm crank length and 680 mm bar width with the rider’s current bike. A junior-specific Acolyte shifter provides the gear control. The short-cage derailleur offers eight gears from one shifter, with no front derailleur to operate.

A soft spring for first trails

The RST Alex fork has a soft coil spring and 100 mm of travel to help take the edge off smaller bumps. Its listed fork size is 26 inches, while the complete bike runs on 24-inch wheels.

Tektro HD-J2820 hydraulic brakes use 160 mm rotors. Have the controls adjusted with the young rider present and check that they can reach and use the levers comfortably. Start with trails and features within the bike’s intended use and the rider’s ability.

Check the fit

The suggested rider height is approximately 130–150 cm for the one-size frame. Compare reach, standover clearance and saddle adjustment with a bike the rider knows. Check comfortable access to the controls in person.

Dartmoor Hornet Junior 24-inch junior mountain bike — specifications:

Sizing, weight and other details:

• Wheel sizes: 24 in
• Weight: Approx. 13.10 kg
• Suggested rider height: 130–150 cm

Fork:

• Fork: RST Alex, 100 mm travel
• Fork wheel size: 26 in
• Fork axle: 9 mm
• Fork spring and steerer: Soft coil spring, 1⅛ in steerer

Drivetrain:

• Drivetrain: Microshift Acolyte 1 x 8
• Cassette: Microshift Acolyte H083, 11–38T
• Rear derailleur: Microshift Acolyte M5180S, short cage, 1 x 8
• Shifter: Microshift Acolyte SL-M6285-R, junior-specific, 8-speed

Brakes and controls:

• Brakes: Tektro HD-J2820 hydraulic, 160 mm rotors

Frame:

• Frame sizes: One size
• Frame: Dartmoor Hornet Junior, 6061-T6 aluminium
• Frame rear axle: 135 x 10 mm

Saddle and seatpost:

• Seatpost: Fixed aluminium post
• Saddle: Dartmoor Trail Junior, railed
• Seatpost: Aluminium, 30.9 mm diameter, 300 mm length

Handlebars:

• Bar: Dartmoor Tornado, aluminium, 680 mm width, 31.8 mm clamp

Stem:

• Stem: Dartmoor Viper, aluminium, Short, 31.8 mm clamp

Headset:

• Headset: Dartmoor Blink, IS42/IS52, cartridge bearings

Wheels and rims:

• Rims: Dartmoor Raptor, 24 in, 32H, tubeless ready, 30 mm internal width

Tyres:

• Tyres: Kenda Amrak, 24 x 2.4 in, 30 TPI

Cranks:

• Cranks: Prowheel Charm, 155 mm

Chainring or sprocket:

• Chainring: 30T, 76 mm BCD

Front hub:

• Front hub: Aluminium, sealed cartridge bearings, 9 mm QR, 32H

Rear hub and driver:

• Rear hub: Aluminium, sealed cartridge bearings, 135 x 10 mm QR, Shimano HG, 32H

Chain:

• Chain: KMC Z8

Grips and bar ends:

• Grips: Dartmoor Proof

Pedals:

• Pedals: Dartmoor Candy

Frame geometry:

• Effective top tube: 521 mm

Warranty registration

Register your purchase to activate the stated two-year manufacturer’s warranty, following the terms supplied with your bike. Keep the purchase receipt and the receipt for the initial professional service.

Replacement parts under a claim

If a claim is accepted and the original product or part is unavailable, the manufacturer or seller may provide an equivalent replacement. Its appearance or construction may differ, while its functional specification remains suitable for the original intended use. This does not affect your statutory consumer rights.

Safety while riding

Riding, falls and impacts put loads through the bike and can damage components. No bike is indestructible: parts can wear out or become damaged. Check the frame, fork, bars, wheels, axles, cranks, pedals, brakes and bolted connections before every ride. Inspect the bike after a hard impact and stop riding if you find looseness, cracks or damage. Have any problem checked and repaired before riding again.

Wear a properly fitted helmet and suitable protective pads. Read our important information before buying and using a bike for assembly, servicing and riding checks.

Important information about your new bike

• Read the instructions and warranty supplied with the bike before riding.
• The bike is delivered approximately 90% assembled for shipping.
• Before the first ride, fit the pedals, saddle and handlebars, and the front wheel where required. Follow the assembly instructions and check all components.
• Have a professional bike workshop carry out a pre-ride inspection. This is a paid service; keep the receipt as proof for the manufacturer’s warranty and follow the warranty terms supplied with your bike.

The manufacturer’s warranty is separate from your statutory consumer rights. Continue to inspect and service the bike throughout its use.