Giant Reign SX

Giant Reign SX – Built for Big Hits and All-Out Descents

The Giant Reign SX is a no-compromise enduro mountain bike designed to deliver total confidence and control on the rowdiest terrain imaginable. Built for big hits, steep lines, and high-speed descents, this trail-crushing machine thrives where the trail gets rough, fast, and unforgiving.

Featuring a mixed wheel setup—a 29-inch front wheel for speed and stability paired with a 27.5-inch rear wheel for agility and playfulness—the Giant Reign SX blends race-ready precision with a fun, responsive feel. Whether you’re charging enduro stages or lapping the bike park, this setup keeps you locked in through rough sections while still popping off features and snapping through corners.

Key Performance Factors

Race-Bred Suspension

The Maestro rear suspension is built to devour aggressive enduro terrain, delivering 165mm of smooth, active rear travel paired with a massive 190mm travel fork up front. A trunnion-mount rear shock with a longer 65mm stroke (up from 60mm on the previous generation) improves small-bump sensitivity and big-hit control. The Advanced Forged Composite upper rocker arm boosts stiffness while reducing overall frame weight for precise handling at speed.

Adjustable Enduro Geometry

Dial in your ride with flip chip adjustability, allowing you to tailor the geometry to your terrain and riding style. Choose between a 63.1° or 63.5° head angle and a 77.9° or 78.3° seat tube angle, resulting in a 25mm or 19mm bottom bracket drop (size medium). The result is confident handling whether you’re smashing steep descents or navigating technical race stages.

Mixed Wheel Size Performance

A 29-inch front wheel provides maximum stability, speed, and front-end control on rough, technical trails, while the 27.5-inch rear wheel enhances agility and maneuverability. This combination lets riders rail corners, stay playful, and maintain control when pushing hard on demanding terrain.

• Sizes
  M, L, XL
• Colours
  Sea Sparkle/Hematite
• 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 downtube storage
• Fork
  Fox 40 Performance, GRIP damper, 190mm, 20x110, custom tuned for Giant
• Shock
  Fox DHX2 Performance Elite, 205/65, custom tuned for Giant M:400#, L:450#, XL:500#
• Handlebar
  Giant Contact SL TR35, 800x35mm, 20mm rise
• Grips
  Giant Tactal Pro Single S:120mm, M:120mm, L:130mm, XL:130mm
• Stem
  TruVativ Descendant Direct Mount 35, 50mm
• Seatpost
  Giant Contact, 30.9mm, 400mm
• Saddle
  Giant Romero
• Pedals
  N/A
• Shifters
  Shimano CUES, SL-6000, 1x10
• Front Derailleur
  N/A
• Rear Derailleur
  Shimano CUES RD-U6000
• Brakes
  SRAM Code R, hydraulic, CenterLine rotors [F]220mm, [R]200mm
• Brake Levers
  SRAM Code R
• Cassette
  Shimano CUES, CS-LG300, 11-48
• Chain
  Shimano CUES LG500
• Crankset
  Praxis Cadet HD M24, 32t, 165mm, 55mm chainline
• Bottom Bracket
  Praxis, press fit
• Rims
  Giant AM 29, alloy
• Hubs
  Giant Boost, sealed
• Spokes
  Stainless steel
• Tires
  [F] Maxxis Assegai 29x2.5 WT, 3C MaxxTerra, EXO+, TR [R] Maxxis Minion DHR II 27.5x2.5 WT, 3C MaxxTerra, DD, TR tubeless
• Extras
  tubeless prepared, 2.5" max tire size, 36t max chainring size, MRP AMG CS chain guide