Giant Boulder Jr W

2012 YouthMountain youth Manufacturer page

Last known price: $290

Prices shown first for United States
Suspension: Rigid
Wheels: 24″
Drivetrain: 1 × 7 38t / 14–28t
Gear range: 200%
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

4 of 20 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

High-Tensile Steel Not identified

Suspension

2 parts

Fork

High-Tensile Steel Not identified
Rear shock

None

Drivetrain

7 parts

Bottom bracket

Semi-Cartridge Not identified
Cassette

14x28, 7-Speed Not identified
Chain

KMZ Z51 Not identified
Crankset

Alloy 3-Piece, 38T Not identified
Front derailleur

None
Rear derailleur
- Shimano Tourney
Shifters
- Shimano

Brakes

2 parts

Brake levers

Alloy Youth MTB Not identified
Brakes

Alloy, Direct Pull Not identified

Wheels and tires

5 parts

Front hub

Alloy, Nutted, 32h Not identified
Rear hub

Alloy, Nutted, 32h Not identified
Rims

Alloy, 24" Not identified
Spokes

Stainless Steel Not identified
Tires
- Giant

Cockpit and contact points

5 parts

Handlebar

Steel Youth MTB, Low Rise Not identified
Pedals

MTB Youth, Nylon Not identified
Saddle
- Giant
Seatpost

Steel, 25.4 Not identified
Stem

Steel Quill Not identified

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 One Size

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack, head tube length, seat tube length and bottom bracket drop / Bottom bracket height, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	521
Head tube angle	72°
Seat tube angle	73°
Chainstay lengthmm	411

Not published by the manufacturer: Reach, Stack, Seat tube length, Head tube length, Wheelbase, Front center, Bottom bracket drop, Bottom bracket height, Standover height, Fork rake, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: girls
Frame material: Steel
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 32.6 in
Highest gear: 65.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.95″
Travel: Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 24″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 12.5 km/h
Highest gear: 25.0 km/h

Total gear range 200%

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: 32.6–65.1 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 2012 builds
Specification	This bicycle Giant Boulder Jr W	Giant Boulder	Giant Boulder Jr	Giant Boulder W
Frame
Intended fit	girls	Unisex	Unisex	womens
Fork material	Steel	Not informed	Steel	Not informed
Suspension
Suspension configuration	Rigid	Hardtail	Rigid	Hardtail
Front travel	Not informed	80 mm	Not informed	80 mm
Drivetrain
Front chainrings	1	3	1	3
Smallest chainring	38	28	38	28
Largest chainring	38	48	38	48
Lowest gear	32.6 in	26.0 in	32.6 in	26.0 in
Highest gear	65.1 in	89.1 in	65.1 in	89.1 in
Other specifications
Suspension	Rigid	Hardtail	Rigid	Hardtail
Tire width	1.95″	2.1″	1.95″	2.1″
Wheel size	24″	26″	24″	26″
Fork spring	Not informed	Coil	Not informed	Coil