Giant Reign SX

2025 MountainDownhill Manufacturer page

Last known price: $4,000

Prices shown first for United States
Travel: 190 / 165 mm Fork / rear shock
Wheels: 29″ / 27.5″
Drivetrain: 1 × 10 32t / 11–48t
Gear range: 436%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD High 171–181
MD Mid 171–181
LG High 178–189
LG Mid 178–189
XL High 186–196
XL Mid 186–196

Components

20 of 22 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

ALUXX SL-grade aluminum front and rear triangles, 165mm Maestro suspension, flip chip, 12x148mm thru-axle, 27.5-inch rear wheel compatible, flip chip - Maestro 3, integrated down tube storage Not identified

Suspension

2 parts

Drivetrain

7 parts

Brakes

2 parts

Brake levers
- TRP
Brakes
- TRP

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Grips
- Giant
Handlebar
- Giant
Pedals

PEDALS NOT SUPPLIED Not identified
Saddle
- Giant
Seatpost
- Giant
Stem
- Truvativ DESCENDANT Direct Mount

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG High

Table

Geometry diagram unavailable

Diagrams for different front and rear wheel sizes are not available yet. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	456	452	476	472	507	503
Stackmm	632	635	641	644	645	648
Top tube lengthmm	587	588	620	621	652	653
Seat tube lengthmm	425	425	450	450	475	475
Head tube lengthmm	105	105	115	115	120	120
Head tube angle	63.5°	63.1°	63.5°	63.1°	63.5°	63.1°
Seat tube angle	78.3°	77.9°	77.3°	77°	77.3°	77°
Chainstay lengthmm	442	443	442	443	442	443
Wheelbasemm	1227	1228	1282	1283	1315	1316
Front centermm	786	786	841	841	874	874
Bottom bracket dropmm	19	25	19	25	19	25
Standover heightmm	742	737	755	750	771	766
Fork rakemm	56	56	56	56	56	56
Trailmm	127	129.8	127	130	127	130
Stack/reach ratio	1.39	1.41	1.35	1.36	1.27	1.29
Suspension and parts
Crank lengthmm	165	165	165	165	165	165
Handlebar widthmm	800	800	800	800	800	800
Stem lengthmm	50	50	50	50	50	50

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 190 mm
Rear travel: 165 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: Different sizes
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire clearance: Maximum tire width: 2.5″
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 29″, 27.5″

Technical analysis

2 measures

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

Front travel

190 mm

This value is below the central range for this class.

Cohort: Mountain / Downhill Model year: 2025
Sample: 99 bicycles with this information
Coverage: 98.0% of the class

Rear travel

165 mm

This value is below the central range for this class.

Cohort: Mountain / Downhill Model year: 2025
Sample: 95 bicycles with this information
Coverage: 94.0% of the class

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 2025 builds
Specification	This bicycle Giant Reign SX	Giant Reign 1	Giant Reign 2	Giant Reign Advanced 1	Giant Reign Advanced 2
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	Not informed	Not informed	Not informed	Not informed	14.06 kg
Suspension
Front travel	190 mm	170 mm	170 mm	170 mm	170 mm
Rear travel	165 mm	160 mm	160 mm	160 mm	160 mm
Drivetrain
Rear sprockets	10	12	12	12	12
Smallest sprocket	11	10	10	10	10
Largest sprocket	48	51	51	52	51
Lowest gear	18.3 in	17.3 in	17.3 in	16.9 in	17.3 in
Highest gear	80.0 in	88.0 in	88.0 in	88.0 in	88.0 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Mechanical
Derailleur hanger	Not informed	Not informed	Not informed	UDH	Not informed
Other specifications
Wheel material	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Bottom bracket standard	Not informed	BB86/BB92	Not informed	Not informed	BB86/BB92