Giant Reign SE

Name: Giant Reign SE
Brand: Giant

2026 MountainEnduro Manufacturer page

Travel: 180 / 165 mm Fork / rear shock
Wheels: 29″ / 27.5″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD High 171–181
MD Low 171–181
MD Mid 171–181
LG Low 178–189
LG High 178–189
LG Mid 178–189
XL Low 186–198
XL High 186–198
XL Mid 186–198

Components

20 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

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

Suspension

2 parts

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Grips
- Giant
Handlebar
- Giant
Pedals

None
Saddle
- Giant
Seatpost
- Giant
Stem
- Giant

Sizes and geometry

9 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 9 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	446	446	450	466	466	470	497	497	501
Stackmm	639	639	636	648	648	645	653	653	650
Top tube lengthmm	588	588	589	621	622	623	653	654	655
Seat tube lengthmm	425	425	425	450	450	450	475	475	475
Head tube lengthmm	105	105	105	105	105	105	120	120	120
Head tube angle	63.5°	63.1°	62.6°	63.1°	63.5°	62.6°	63.1°	63.5°	62.6°
Seat tube angle	77.8°	77.9°	77.4°	77°	76.8°	76.4°	77°	76.8°	76.4°
Chainstay lengthmm	443	443	442	443	443	442	443	443	442
Wheelbasemm	1251	1251	1250	1275	1275	1274	1308	1308	1307
Front centermm	809	809	808	833	833	832	866	866	865
Bottom bracket dropmm	20	20	15	20	20	15	21	21	15
Standover heightmm	734	734	739	750	750	755	744	744	749
Fork rakemm	44	44	44	44	44	44	44	44	44
Trailmm	147	147	145	147	147	145	147	147	144
Stack/reach ratio	1.43	1.43	1.41	1.39	1.39	1.37	1.31	1.31	1.30
Suspension and parts
Crank lengthmm	165	165	165	165	165	165	165	165	165
Handlebar widthmm	800	800	800	800	800	800	800	800	800
Stem lengthmm	40	40	40	40	40	40	40	40	40

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: 180 mm
Rear travel: 165 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 16.9 in
Highest gear: 88.0 in

Wheels and brakes

Wheel configuration: Different sizes
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper 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

3 measures

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

Front travel

180 mm

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,332 bicycles with this information
Coverage: 95.2% of the class

Rear travel

165 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,005 bicycles with this information
Coverage: 71.8% of the class

Shifting

Mechanical

454 of 1,399 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,399 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.7 km/h

Total gear range 520%

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.