Overview
The 2025 Giant Reign Advanced is Giant’s analog enduro race bike — no motor, just 160mm of Maestro rear suspension matched with a 170mm Fox 38 Factory fork and a mullet wheel setup (29″ front / 27.5″ rear). The Advanced-grade composite frame is the same proven Maestro platform used in the Reign E+, but without the motor and battery weight, giving it a significantly lighter, more agile character. A three-position flip chip adjusts the head angle from a super-slack 62.7° through 63.0° to 63.4°.
New to bike geometry? Our complete guide to mountain bike geometry explains every measurement and what it means for your riding. You can also learn how to read a geometry chart to compare this bike against other models.
The Reign Advanced 1 comes in at $6,800 with Fox 38 Factory GRIP X2 fork, Fox Float X2 Factory shock, and SRAM GX Eagle drivetrain. Available in four sizes (S through XL), the bike runs TRP EVO DH-R brakes with 220mm front / 200mm rear rotors — serious stopping power for steep terrain. The mullet wheel setup is core to the Reign’s identity, pairing the stability and rollover of a 29″ front wheel with the agility and acceleration of a 27.5″ rear.
Geometry Diagram
Geometry Table
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat Tube Length | 400mm | 425mm | 450mm | 475mm |
| Seat Tube Angle (Low/Mid/High) | 77.5° / 77.8° / 78.2° | 77.5° / 77.8° / 78.2° | 76.5° / 76.9° / 77.2° | 76.5° / 76.9° / 77.2° |
| Top Tube Length (Low) | 556mm | 587mm | 621mm | 653mm |
| Head Tube Length | 100mm | 105mm | 115mm | 120mm |
| Head Tube Angle (Low/Mid/High) | 62.7° / 63.0° / 63.4° | 62.7° / 63.0° / 63.4° | 62.7° / 63.1° / 63.4° | 62.7° / 63.1° / 63.4° |
| Fork Rake | 44mm | 44mm | 44mm | 44mm |
| Wheelbase (Low) | 1212mm | 1244mm | 1269mm | 1302mm |
| Chainstay Length (Low/Mid/High) | 445mm / 443mm / 442mm | 445mm / 443mm / 442mm | 445mm / 443mm / 442mm | 445mm / 443mm / 442mm |
| BB Drop (Low/Mid/High) | 29mm / 24mm / 19mm | 29mm / 24mm / 19mm | 29mm / 24mm / 19mm | 29mm / 24mm / 19mm |
| Stack (Low) | 627mm | 632mm | 641mm | 649mm |
| Reach (Low) | 418mm | 448mm | 468mm | 499mm |
| Standover Height (Low) | 713mm | 738mm | 746mm | 762mm |
| Wheel Size | 29″ F / 27.5″ R | 29″ F / 27.5″ R | 29″ F / 27.5″ R | 29″ F / 27.5″ R |
Geometry Analysis
The Reign Advanced’s geometry is pure enduro aggression. The 62.7° head angle in low position is among the slackest in the analog enduro class — slacker than a Specialized Enduro or Trek Slash. This inspires massive confidence on steep, loose descents. The 77.5° seat tube angle (76.5° on L/XL) keeps climbing efficient despite the slack front end. Reach figures are solid: 448mm on Medium provides a roomy cockpit without being excessive. The 442mm chainstays are notably short for a mullet enduro bike — shorter than the E+ version’s 450mm — contributing to a lively, responsive rear end. BB drop of 29mm in low position is deep, planting the bike for aggressive cornering. The wheelbase of 1244mm (M) is long enough for high-speed stability while remaining manageable in tight terrain. The three-position flip chip allows 10mm of BB height adjustment across positions for rough terrain clearance.
Ride Characteristics
Without the motor weight, the Reign Advanced is a different beast from its E+ sibling. It’s lively, responsive, and rewards active riding. The 160mm Maestro suspension delivers the plush, progressive feel that Giant’s 4-pivot platform is known for — excellent small-bump sensitivity with a supportive midstroke and progressive ramp to bottom-out. The Fox Float X2 Factory shock with two low-speed compression adjustments lets you tune between plush descending and firm pedaling. Climbing, the Reign is honest — the steep seat angle and efficient suspension help, but at full enduro weight and with a 170mm fork, this isn’t a climbing bike. It’s a descending weapon that can get back uphill. Descending is where the Reign Advanced lives: the slack geometry, long wheelbase, and mullet wheels combine to create a bike that’s composed through rock gardens, confident on steep chutes, and precise through turns. The short chainstays give it a playful pop that’s missing from longer-chainstay competitors.
Key Specs
Frame: Advanced-grade composite, Maestro 4-pivot, 160mm travel. Wheel Size: 29″ front / 27.5″ rear (mullet). Fork: Fox 38 Factory, GRIP X2, 170mm. Shock: Fox Float X2 Factory, 205/62.5mm. Sizes: S, M, L, XL. Drivetrain: SRAM GX Eagle 1×12, 10-52t. Brakes: TRP EVO DH-R hydraulic, 220mm (F) / 200mm (R). Price: $6,800.
What’s New vs Previous Generation
The 2025 Reign Advanced carries forward the proven Maestro enduro platform with updated spec choices. The three-position flip chip system remains, as does the mullet wheel configuration. Key updates include TRP EVO DH-R brakes replacing previous brake options, refined suspension tunes, and the latest SRAM Eagle drivetrain options. The frame geometry is unchanged — Giant has maintained the aggressive numbers that made the Reign a proven enduro race platform.
Who Should Consider This Bike
The Reign Advanced is built for committed enduro riders — racers, shuttle laps enthusiasts, and anyone whose riding is heavily biased toward descending. If you race enduro events or your local trails feature sustained, steep, technical descents, the Reign delivers. Riders who want motor assistance should look at the Reign Advanced E+. Those wanting a more trail-oriented ride with less travel should consider the Trance X. And riders seeking even more travel for bike park or freeride should look at the Reign SX or Glory.
Comparable Models
The Reign Advanced competes with the Specialized Enduro, Trek Slash, Santa Cruz Nomad, Yeti SB160, Commencal Meta AM, and Canyon Torque. The Specialized Enduro runs 170mm rear / 180mm fork with full 29″ wheels. The Trek Slash offers similar travel with 29″ wheels. The Reign’s mullet wheel setup is its distinguishing feature — most competitors have moved to full 29″. At $6,800, the Reign Advanced 1 offers Fox Factory suspension at a competitive price point. The 442mm chainstays are among the shortest in the enduro class.
Related Geometry
More Giant geometry: 2023 Giant Anthem Geometry, 2023 Giant Glory Geometry, 2023 Giant Reign E+ Geometry, 2023 Giant Reign Geometry, 2023 Giant Reign SX Geometry.
Compare enduro bikes: 2023 Norco Range Geometry, 2023 Norco Shore Geometry, 2023 Trek Slash Geometry.
Frequently Asked Questions
What is the travel on the 2025 Giant Reign Advanced?
The Reign Advanced has 160mm of Maestro rear suspension travel paired with a 170mm Fox 38 Factory fork.
Does the Giant Reign Advanced run mullet wheels?
Yes. The Reign Advanced runs a mullet configuration: 29″ front wheel for rollover and stability, 27.5″ rear wheel for agility and acceleration. This is standard, not optional.
What is the head angle on the Giant Reign Advanced?
The head angle is adjustable via a three-position flip chip: 62.7° (low), 63.0° (mid), or 63.4° (high). All positions are extremely slack by enduro standards.
How much does the Giant Reign Advanced cost?
The 2025 Reign Advanced 1 retails for $6,800 with Fox Factory suspension, SRAM GX Eagle drivetrain, and TRP brakes.
What is the difference between the Reign Advanced and Reign SX?
The Reign Advanced uses an Advanced-grade composite frame with 160mm rear / 170mm fork travel. The Reign SX has an ALUXX SL aluminum frame with 165mm rear / 190mm fork travel and a Boxxer fork — it’s the more gravity-oriented, park-friendly option at a lower $4,000 price point.