Specialized BigHit FSR III

2010 MountainDownhill Manufacturer page

Fork travel: 180 mm
Wheels: 26″
Drivetrain: 1 × 9 36t / 11–34t
Gear range: 309%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

12 of 23 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

BigHit FSR, M4 Premium Aluminum ORE TT/DT, full cartridge bearing pivots, ISCG mount, asymetrical rear triangle, 7.5"" travel Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

sealed outboard cartridge bearing for Moto-X crank, 73mm shell Not identified
Cassette
- Shimano CS-HG50 11–34t
CS-HG50
Chain
- SRAM PC-971 9 speeds
PC-971
Crankset

Gravity Moto-X MegaExo, forged solid arms, 36t steel ring with chain guide Not identified
Rear derailleur
- SRAM X9
X-9
Shifters
- SRAM X7 Trigger 10 speeds
X-7

Brakes

2 parts

Wheels and tires

5 parts

Front hub

Hi-Lo disc, 20mm thru-axle, 36h Not identified
Rear hub

Disc, Hi Lo flange, sealed cartridge bearing, machined disc mount, bolt on, 36h Not identified
Rims
- DT Swiss
Spokes

14g stainless Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar

6061 Alloy DH low rise bar, 31.8mm bar, 750mm wide, 9 degree backsweep, 6 degree up Not identified
Headset

1.125/1.5"" Threadless, loose ball, steel cups Not identified
Pedals

Alloy platform, 9/16"" Not identified
Saddle
- Specialized
Seatpost

6061 butted alloy, two bolt no offset, 30.9mm Not identified
Stem

Aggro stem, 35mm extension, OS 31.8, 4-bolt, forged Not identified

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 427mm

Stack 595mm

Wheelbase 1185mm

Head angle 65.5°

Seat angle 75.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	404	427	449
Stackmm	595	595	595
Top tube lengthmm	563	586	608
Seat tube lengthmm	394	419	458
Head tube lengthmm	120	120	120
Head tube angle	65.5°	65.5°	65.5°
Seat tube angle	75°	75°	75°
Chainstay lengthmm	426	426	426
Wheelbasemm	1162	1185	1207
Front centermm	737	760	782
Bottom bracket dropmm	-22	-22	-22
Bottom bracket heightmm	365	365	365
Standover heightmm	758	763	750
Fork rakemm	47	47	47
Trailmm	105	105	105
Stack/reach ratio	1.47	1.39	1.33
Suspension and parts
Crank lengthmm	170	170	170
Handlebar widthmm	750	750	750
Stem lengthmm	40	40	40
Seatpost lengthmm	300	300	300

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 180 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 27.5 in
Highest gear: 85.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Rear shock spring: Coil
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.5 km/h
Highest gear: 32.6 km/h

Total gear range 309%

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: 27.5–85.1 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 2010 builds

Differences across 2010 builds
Specification	This bicycle Specialized BigHit FSR III	Specialized BigHit FSR I	Specialized BigHit FSR II
Frame
Frame material	Aluminum	Not informed	Aluminum
Suspension
Front travel	180 mm	160 mm	180 mm
Drivetrain
Smallest chainring	36	34	36
Largest chainring	36	34	36
Rear sprockets	9	8	9
Largest sprocket	34	32	34
Lowest gear	27.5 in	27.6 in	27.5 in
Highest gear	85.1 in	80.4 in	85.1 in
Other specifications
Rear shock spring	Coil	Not informed	Coil