Overview
The 2026 Giant Reign SE is a purpose-built aluminum enduro machine that embraces the mullet wheel configuration — 29-inch front, 27.5-inch rear — to blend high-speed stability with rear-end agility. Built around an ALUXX SL-grade aluminum frame with 165mm of Maestro rear suspension and a 180mm RockShox Zeb Ultimate fork, the Reign SE is designed for riders who want proven enduro performance without the carbon price tag.
Available in three sizes (M, L, XL) at CAD $6,499, the Reign SE features Giant’s flip-chip geometry adjustment, toggling between a 62.6° and 63.0° head angle. The spec sheet reads like a gravity-focused parts bin: SRAM Eagle 90 Transmission, SRAM Maven Silver four-piston brakes with 220mm front rotors, and a Maxxis Assegai/DHR II tire combo in MaxxGrip compound. Integrated downtube storage and a size-specific Giant Contact Switch AT dropper post (up to 200mm travel on L/XL) round out a bike that punches well above its price point.
Geometry Diagram
Geometry Table
| Measurement | M | L | XL |
|---|---|---|---|
| Seat Tube Length | 425mm | 450mm | 475mm |
| Seat Tube Angle (Mid/High) | 77.4° / 77.8° | 76.4° / 76.8° | 76.4° / 76.8° |
| Top Tube Length (Mid/High) | 589mm / 588mm | 623mm / 622mm | 655mm / 654mm |
| Head Tube Length | 105mm | 105mm | 120mm |
| Head Tube Angle (Mid/High) | 62.6° / 63.0° | 62.6° / 63.0° | 62.6° / 63.0° |
| Fork Rake | 44mm | 44mm | 44mm |
| Trail (Mid/High) | 147mm / 145mm | 147mm / 145mm | 147mm / 144mm |
| Wheelbase (Mid/High) | 1251mm / 1250mm | 1275mm / 1274mm | 1308mm / 1307mm |
| Chainstay Length (Mid/High) | 443mm / 442mm | 443mm / 442mm | 443mm / 442mm |
| BB Drop (Mid/High) | 20mm / 15mm | 20mm / 15mm | 21mm / 15mm |
| Stack (Mid/High) | 639mm / 636mm | 648mm / 645mm | 653mm / 650mm |
| Reach (Mid/High) | 446mm / 450mm | 466mm / 470mm | 497mm / 501mm |
| Standover (Mid/High) | 734mm / 739mm | 750mm / 755mm | 744mm / 749mm |
| Handlebar Width | 800mm | 800mm | 800mm |
| Stem Length | 40mm | 40mm | 40mm |
| Crank Length | 165mm | 165mm | 165mm |
| Wheel Size | 29″/27.5″ | 29″/27.5″ | 29″/27.5″ |
Geometry Analysis
The Reign SE’s geometry is unambiguously enduro — this bike is designed to go downhill fast on demanding terrain. The 62.6° head angle in mid position is extremely slack, placing this bike at the aggressive end of the enduro spectrum alongside bikes like the Santa Cruz Nomad and Specialized Enduro. Combined with 147mm of trail, the front end inspires confidence at speed on steep, technical terrain where a less-slack bike would feel pushed and nervous.
The mullet wheel configuration is a key part of the geometry story. The smaller 27.5-inch rear wheel naturally raises the bottom bracket relative to a full 29er while shortening the rear center, giving the Reign SE a lively, maneuverable rear end despite the long wheelbase (1275mm on size L). The 443mm chainstays are short for a bike with this much travel, and the combination of steep seat tube angle (76.4° on L) with short chainstays creates a weight-forward climbing position that partially compensates for the ultra-slack front end on uphills.
Ride Characteristics
On descents, the Reign SE is in its element. The combination of 165mm rear travel, 180mm fork, and gravity-oriented geometry creates a bike that eats up rough terrain with composure. The Maestro suspension platform delivers excellent small-bump sensitivity while ramping up progressively through the travel — there’s plenty of support for big hits and drops without harsh bottom-outs. The mullet configuration gives the rear wheel a noticeably quicker, more playful feel than a full 29er setup, making it easier to snap the bike through tight corners and get the rear wheel off the ground for manuals and jumps. Climbing requires acceptance of what this bike is: the 62.6° head angle means front-end wander on steep fireroad climbs, and the 180mm fork keeps the front end high. Technical climbs are actually where the Reign SE surprises — the rear grip is excellent and the Maestro platform pedals efficiently for a long-travel enduro bike.
Key Specs
Frame: ALUXX SL-grade aluminum, Maestro suspension, 165mm travel. Wheel Size: 29″ front / 27.5″ rear. Fork: RockShox Zeb Ultimate, 180mm, Charger 3.1 RC2. Shock: RockShox Vivid Ultimate, RCT2, adjustable hydraulic bottom out. Sizes: M, L, XL. Drivetrain: SRAM Eagle 90 Transmission, 12-speed, 10-52t. Brakes: SRAM Maven Silver, 4-piston, 220mm front / 200mm rear. Seatpost: Giant Contact Switch AT dropper, 140-170mm (M) / 170-200mm (L/XL). Tires: Maxxis Assegai 29×2.5″ WT (F) / Minion DHR II 27.5×2.4″ WT (R), MaxxGrip, DD casing.
What’s New vs Previous Generation
The Reign SE is a new addition to Giant’s lineup for 2026, sitting alongside the carbon Reign Advanced as the aluminum enduro option. It replaces the previous Reign SX concept with a more refined package. The SE designation signals a dedicated mullet (mixed wheel) platform rather than the convertible 29er approach of the Reign Advanced. The ALUXX SL aluminum frame, SRAM Eagle 90 Transmission, and flip-chip geometry adjustment bring premium features to a more accessible price point. The integrated downtube storage compartment and Advanced Forged Composite upper rocker arm are details borrowed from the carbon Reign platform.
Who Should Consider This Bike
The Reign SE is ideal for enduro racers and aggressive trail riders who want a gravity-focused bike without the carbon premium. If you prefer the playful, maneuverable feel of a mullet setup over a full 29er, and your trails reward descending ability over climbing efficiency, this bike delivers serious performance at a competitive price. Riders who prioritize climbing or smoother trails should look at the Trance X platform instead.
Comparable Models
The Reign SE competes with the YT Capra (aluminum, similar travel and price), Commencal Clash (alloy enduro, 27.5″), Norco Shore (freeride-oriented alloy), and Canyon Torque (aluminum gravity platform). Against these competitors, the Reign SE’s Maestro suspension, flip-chip adjustment, and SRAM Transmission drivetrain represent a strong value proposition. The carbon Reign Advanced offers the same platform in a lighter, stiffer package for riders willing to spend more.
Frequently Asked Questions
What wheel size does the 2026 Giant Reign SE use?
The Reign SE runs a mixed wheel (mullet) configuration with a 29-inch front wheel and 27.5-inch rear wheel. This combines the rollover capability and stability of a 29er front end with the agility and playfulness of a smaller rear wheel.
What is the travel on the 2026 Giant Reign SE?
The Reign SE has 165mm of rear travel via Giant’s Maestro suspension system, paired with a 180mm RockShox Zeb Ultimate fork. This places it firmly in the enduro category.
Does the Giant Reign SE have adjustable geometry?
Yes. The Reign SE features a flip chip that toggles between a Mid setting (62.6° head angle, 20mm BB drop) and a High setting (63.0° head angle, 15mm BB drop). The Mid setting is slacker and lower for maximum descending performance, while the High setting raises the BB and steepens the head angle slightly for more pedaling efficiency.
What sizes does the Giant Reign SE come in?
The 2026 Reign SE comes in three sizes: M (fits 171-180cm / 5’7″-5’11”), L (fits 179-188cm / 5’10”-6’2″), and XL (fits 187-198cm / 6’2″-6’6″). Note there is no Small size offered.
What is the difference between the Reign SE and Reign Advanced?
The Reign SE uses an ALUXX SL aluminum frame with a dedicated mullet (29/27.5) wheel setup, 165mm rear travel, and comes in three sizes (M-XL). The Reign Advanced uses an Advanced-grade carbon frame with full 29-inch wheels, 160mm rear travel, and comes in four sizes (S-XL). The SE is more gravity-oriented with its mullet setup and extra travel, while the Advanced is the lighter, more versatile enduro option.
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.