Giant Boulder

2012 MountainCross-country Manufacturer page

Last known price: $360

Prices shown first for United States
Fork travel: 80 mm
Wheels: 26″
Drivetrain: 3 × 7 28–48t / 14–28t
Gear range: 343%
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

11 of 21 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

4130 Custom Steel Tubing Not identified

Suspension

2 parts

Fork
- SR Suntour
Rear shock

None

Drivetrain

7 parts

Bottom bracket

Sealed Cartridge Not identified
Cassette
- Shimano MF-TZ21
MF-TZ21
Chain
- KMC
Crankset
- SR Suntour 28/38/48t
Front derailleur
- Shimano Tourney
Rear derailleur
- Shimano Tourney
Shifters
- Shimano ST-EF40
ST-EF40

Brakes

2 parts

Brake levers
- Shimano ST-EF40
ST-EF40
Brakes

Alloy Linear Pull Not identified

Wheels and tires

5 parts

Front hub

Alloy, 32h Not identified
Rear hub

Alloy, 32h Not identified
Rims
- Giant
Spokes

Stainless Steel, 14g Not identified
Tires
- Giant

Cockpit and contact points

5 parts

Handlebar

Steel, 50mm Rise, 25.4 Not identified
Pedals

Nylon Platform Not identified
Saddle
- Giant
Seatpost

Alloy, 29.2 Not identified
Stem

Alloy Not identified

Sizes and geometry

6 sizes Open in the geometry plotter

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

Size SM

Table

Geometry diagram unavailable

The drawing needs reach, stack, 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 6 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	521	541	569	579	592	617
Head tube lengthmm	117	119	130	145	160	180
Head tube angle	70.5°	69°	69°	69°	69°	69°
Seat tube angle	75°	72.5°	72.5°	72.5°	72°	72°
Chainstay lengthmm	424	424	424	424	424	424
Wheelbasemm	1008	1031	1057	1077	1090	1105
Standover heightmm	615	643	714	747	785	836

Not published by the manufacturer: Reach, Stack, Seat tube length, Front center, Bottom bracket drop, Bottom bracket 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: Unisex
Frame material: Steel

Suspension

Suspension configuration: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 26.0 in
Highest gear: 89.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2.1″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

80 mm

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2012
Sample: 238 bicycles with this information
Coverage: 75.3% of the class

Lowest gear

26.0 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2012
Sample: 294 bicycles with this information
Coverage: 93.0% of the class

Highest gear

89.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2012
Sample: 294 bicycles with this information
Coverage: 93.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.0 km/h
Highest gear: 34.1 km/h

Total gear range 343%

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: 26.0–89.1 gear inches
Class reference (p10–p90): 16.8–116.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2012
Lowest gear: 294 bicycles with this information, 93.0% of the class
Highest gear: 294 bicycles with this information, 93.0% of the class

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