Dartmoor Rocbird Junior 27.5/26

Name: Dartmoor Rocbird Junior 27.5/26
Brand: Dartmoor

2026 YouthGeneral youth Manufacturer page

Travel: 160 / 160 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 10 32t / 11–48t
Gear range: 436%
Weight: 15.6 kg 34.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

18 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

glossy Solar Eclipse or matt Cool Grey/Blue, AL 6061-T6, travel 160mm Not identified

Suspension

2 parts

Drivetrain

5 parts

Cassette
- Shimano CS-LG400-11 11 speeds 11–48t
CS-LG400-11
Chain
- Shimano CN-LG500
CN-LG500
Crankset
- Prowheel
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

1 part

Brakes
- Hayes

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size MD

Table

Reach 400mm

Stack 628mm

Wheelbase 1132mm

Head angle 64.5°

Seat angle 78.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	400
Stackmm	628
Seat tube lengthmm	361
Head tube lengthmm	100
Head tube angle	64.5°
Seat tube angle	78°
Chainstay lengthmm	415
Wheelbasemm	1132
Front centermm	718
Bottom bracket dropmm	26
Standover heightmm	628
Fork rakemm	28
Stack/reach ratio	1.57

Not published by the manufacturer: Top tube length, Bottom bracket height, Trail, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 15.6 kg

34.4 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 160 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 48
Lowest gear: 18.3 in
Highest gear: 80.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 27.5″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 30.6 km/h

Total gear range 436%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.3–80.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds

Differences across 2026 builds
Specification	This bicycle Dartmoor Rocbird Junior 27.5/26	Dartmoor Rocbird Enduro EVO	Dartmoor Rocbird Enduro Intro	Dartmoor Rocbird Enduro PRO XT Di2	Dartmoor Rocbird Junior 26/24	Dartmoor Rocbird Trail EVO
Frame
Bicycle weight	15.6 kg	16.2 kg	16 kg	15.9 kg	14.5 kg	15.7 kg
Suspension
Front travel	160 mm	160 mm	160 mm	160 mm	140 mm	150 mm
Rear travel	160 mm	160 mm	160 mm	160 mm	Not informed	140 mm
Drivetrain
Smallest chainring	32	30	32	32	30	30
Largest chainring	32	30	32	32	30	30
Rear sprockets	10	11	11	12	9	11
Smallest sprocket	11	11	11	10	11	11
Largest sprocket	48	51	50	51	38	51
Lowest gear	18.3 in	16.2 in	17.6 in	17.3 in	20.5 in	16.2 in
Highest gear	80.0 in	75.0 in	80.0 in	88.0 in	70.9 in	75.0 in
Wheels
Wheel configuration	Same size	Different sizes	Different sizes	Different sizes	Same size	Different sizes
Cockpit
Seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Rigid seatpost	Dropper seatpost
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Mechanical	Mechanical
Derailleur hanger	Not informed	UDH	Not informed	Not informed	Not informed	UDH
Other specifications
Fork spring	Air	Air	Air	Air	Not informed	Air
Tire width	2.4″	2.5″	2.4″	2.5″	2.4″	2.4″
Wheel size	27.5″	29″ / 27.5″	29″ / 27.5″	29″ / 27.5″	26″	29″ / 27.5″
Bottom bracket standard	Not informed	Not informed	Not informed	BSA	Not informed	Not informed