Giant Reign SX 2025 Bike

Big hits and all-out descents. This trail-crushing enduro machine delivers confidence and control for the rowdiest terrain. Its mixed wheel size, with a 29-inch front and 27.5-inch rear, blends stability and speed with agility that pops.

Features

Race-Bred Suspension

Maestro rear suspension eats up enduro terrain with 165mm of smooth, active rear travel matched with a 190mm travel fork. The trunnion mount rear shock has a longer stroke (65mm over 60mm on the previous generation) while the Advanced Forged Composite upper rocker arm adds stiffness and lowers overall frame weight.

Adjustable Enduro Geometry

Flip chip adjustability lets you switch between two settings depending on the terrain. You can select a 63.1 or 63.5-degree head angle and corresponding 77.9 or 78.3-degree seat tube angle, resulting in a 25 or 19mm bottom bracket drop (size medium) to fine-tune handling for varying trail conditions and riding style.

Mixed Wheel Size

A 29-inch front wheel provides speed, stability and front-end control on rough, technical trails. A 27.5-inch rear wheel adds agility and maneuverability to help riders rail corners, pop over features and show off their style.

Technologies

• Advanced Forged Composite Technology: A state-of-the-art high-pressure moulding process is used to produce complex-shaped carbon fibre components that are lighter, stiffer and stronger than similar components made from aluminium. This technology is used in critical performance parts such as Maestro Suspension rocker links.
• Aluxx SL Aluminium Technology: This High-Performance level, state-of-the-art aluminium material is made predominantly from 6011 alloy and delivers best-in-class strength-to-weight ratios. These framesets also feature unique welding technologies for high-performance ride quality.
• Flip Chip Maestro 3: This all-new technology allows riders to quickly adjust the geometry and choose a rear wheel size (29-inch or 27.5-inch) for their riding style and terrain. It's available on select Maestro-equipped mountain bikes. The adjustment affects head tube and seat tube angles, bottom bracket height, and rear-wheel size using eccentric flip chip hardware located on the upper rocker arm of the rear suspension.
• Maestro Suspension Technology: Four strategically positioned pivot points and two linkages all work together to create a single floating pivot for the most active, efficient and independent suspension system on the trail.
• Over Drive: Giant's original oversized fork steerer tube technology. Designed to provide precise front-end steering performance, the system's oversized headset bearings (1 1/4" lower and 1 1/8" upper for road, 1 1/2" lower and 1 1/8" upper for mountain) and tapered steerer tube work in conjunction to provide optimal steering stiffness.
• Tubeless System: Fewer flat tires. Greater traction. Less rolling resistance and a smoother, faster ride. Giant's Tubeless System makes it easier than ever to experience all these benefits.

Specification

Frame and Forks

• Frame: ALUXX SL-Grade Aluminium Front And Rear Triangles, 165mm Maestro Suspension, Flip Chip, 12 x 148mm Thru-Axle, 27.5-Inch Rear Wheel Compatible, Flip Chip - Maestro 3, Integrated Down Tube Storage
• Forks: RockShox BoXXer, Charger 3 RC Damper, 190mm, 20 x 110mm, Custom Tuned For Giant
• Rear Shock: RockShox Vivid Base, Lockout, 205 x 65mm

Drivetrain

• Crankset: Praxis Cadet HD M24, 32 Tooth, 165mm, 55mm Chainline
• Bottom Bracket: Praxis, Press Fit
• Rear Derailleur: MicroSHIFT Advent X
• Cassette: MicroSHIFT Advent X, 11-48 Tooth
• Chain: KMC X-10

Braking/Shifting

• Shifters: MicroSHIFT Trail Trigger Pro, 1 x 10
• Front Brake: TRP EVO DH-R, Hydraulic, TRP Rotors 220mm
• Rear Brake: TRP EVO DH-R, Hydraulic, TRP Rotors 200mm
• Brake Levers: TRP EVO DH-R

Wheels

• Rims: Giant TRA 2 Wheelset, 6061 Alloy, Hookless, 30mm Inner Width, 40mm Outer Width, 21mm Height, Wide Guard Technology
• Front Hub: Giant MTB Alloy, Six-Bolt
• Rear Hub: Giant MTB Alloy, 72 POE (Points Of Engagement), Six-Bolt, HG Driver Body
• Spokes: Sapim, 28, J-Bend
• Front Tyre: Maxxis Assegai 29 x 2.5" WT, 3C MaxxTerra, EXO+, TR
• Rear Tyre: Maxxis Assegai 27.5 x 2.5" WT, 3C MaxxGrip, DD, TR Tubeless

Finishing Kit

• Handlebars: Giant Contact SL TR35, 800 x 35mm, 20mm Rise
• Grips: Giant Tactal Pro Single
• Stem: TruVativ Descendant Direct Mount 35, 50mm
• Seatpost: Giant Contact, 30.9mm, 400mm
• Saddle: Giant Romero
• Pedals: Not Included