Dartmoor Sparrow Mullet 29/27.5-inch trail mountain bike — a single-chainring setup for exploring your local trails:

Key features

• Wheel sizes: 29 in front / 27.5 in rear
• Frame sizes: Medium and Large
• Suggested rider height: Medium: approx. 160–175 cm; Large: approx. 175–185 cm
• Fork: X-Fusion RC32 Boost Air, 130 mm travel, compression and rebound adjustment
• Drivetrain: Microshift Advent X 1 x 10, 11–48T cassette
• Brakes: Shimano MT-201 two-piston hydraulic discs, 180 mm rotors
• Rims: Dartmoor Raptor, tubeless ready, 30 mm internal width
• Weight: Approx. 13.60 kg

One shifter for the trail ahead

A single chainring keeps front shifting out of your ride. This Sparrow uses a 30T chainring and ten-speed 11–48T cassette, giving you a choice of ratios as the gradient changes. Choose a gear before a steep section and keep the drivetrain adjusted and lubricated.

What does mullet mean?

The front wheel is 29 inches and the rear wheel is 27.5 inches. The larger front wheel has a shallower approach angle to a given obstacle than a smaller wheel. Handling also depends on geometry, tyres, setup and the rider.

Set the air fork for your weight

The X-Fusion RC32 Boost Air fork offers 130 mm of travel, with compression and rebound adjustment. Its air spring lets you adjust spring pressure for your weight. Follow the fork’s instructions, use a suitable shock pump and stay within the permitted pressure range.

The frame has a 66° head angle and 75° effective seat angle. Reach is 440 mm in Medium and 470 mm in Large. These measurements help you compare riding positions before choosing a size.

Choose your frame size

The suggested rider height is approximately 160–175 cm for Medium and 175–185 cm for Large. Compare reach, frame clearance and your preferred position with a bike you already know. Body proportions and riding style matter alongside height.

Tubeless-ready rims give you an upgrade option

The Raptor rims have a 30 mm internal width and are tubeless ready. Before converting, check that the fitted tyres are suitable too, and use compatible tape, valves and sealant. A tubeless-ready rim alone does not mean the complete wheel is ready to run without an inner tube.

Questions before you choose

Is this a starting point for MTB? The Sparrow is aimed at beginner and intermediate trail riders. Choose routes within the model’s limits and your ability.

Is it ready to ride straight from the box? It arrives approximately 90% assembled. Finish the assembly and have it checked before riding; the details are below.

Wear suitable protective equipment, follow the component setup instructions and inspect the bike after hard impacts. The listed weight is approximately 13.60 kg.

Dartmoor Sparrow Mullet 29/27.5-inch trail mountain bike — specifications:

Sizing, weight and other details:

• Wheel sizes: 29 in front / 27.5 in rear
• Suggested rider height: Medium: approx. 160–175 cm; Large: approx. 175–185 cm
• Weight: Approx. 13.60 kg

Frame:

• Frame sizes: Medium and Large
• Frame: Dartmoor Sparrow Mullet, hydroformed 6061-T6 aluminium

Fork:

• Fork: X-Fusion RC32 Boost Air, 130 mm travel, compression and rebound adjustment
• Fork wheel size and axle: 29 in, 15 mm Boost thru-axle
• Fork spring: Air

Drivetrain:

• Drivetrain: Microshift Advent X 1 x 10, 11–48T cassette
• Cassette: Microshift CS-H104, 11–48T
• Rear derailleur: Microshift Advent X RD-M6205GM, 1 x 10
• Shifter: Microshift Advent X SL-M9605-R, 10-speed

Brakes and controls:

• Brakes: Shimano MT-201 two-piston hydraulic discs, 180 mm rotors

Wheels and rims:

• Rims: Dartmoor Raptor, tubeless ready, 30 mm internal width
• Rims — sizes and drilling: 29 in front / 27.5 in rear, 32H

Rear hub and driver:

• Rear hub spacing and axle: 135 x 10 mm
• Rear hub: Aluminium cassette hub, cartridge bearings, 135 x 10 mm quick release, 32H

Handlebars:

• Bar: Dartmoor Tornado Low, aluminium, 780 mm width, 31.8 mm clamp

Stem:

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

Headset:

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

Tyres:

• Front tyre: Vee Tire Crown Gem, 29 x 2.3 in
• Rear tyre: Vee Tire Crown Gem, 27.5 x 2.35 in

Cranks:

• Cranks: FSA Gamma Pro, 170 mm (Medium) / 175 mm (Large)

Bottom bracket:

• Bottom bracket: BSA/Euro, 73 mm

Chainring or sprocket:

• Chainring: 30T, 82 mm BCD

Front hub:

• Front hub: Dartmoor Reel Boost, aluminium, cartridge bearings, 110 x 15 mm Boost axle, 32H

Chain:

• Chain: KMC X10

Saddle and seatpost:

• Saddle: Dartmoor Ferns, railed
• Seatpost: Aluminium, 30.9 mm diameter, 350 mm length (Medium) / 400 mm (Large)

Grips and bar ends:

• Grips: Dartmoor Maze Lite

Pedals:

• Pedals: Dartmoor Vibe

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.