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2025
Giant Reign Advanced 1
Go fast, get rowdy and nail new lines. With a full-composite chassis, developed with Giant’s enduro racing pros, this hard-charging enduro bike has 160mm of Maestro rear suspension, adjustable geometry, and is setup with a mullet wheel configuration.
Highlights
Race-bred suspension
A Maestro rear suspension system with 160mm of travel, paired with a 170mm fork, was developed and tested under the extreme conditions of Enduro World Series races. The trunnion mount shock has a longer stroke (62.5mm compared to 60mm on the previous generation). And the Advanced Forged Composite upper rocker arm adds stiffness and lowers overall weight.
Adjustable enduro geometry
Flip chip technology lets you switch between three settings depending on the terrain. You can select a 62.7, 63 or 63.4-degree head angle and corresponding 77.5, 77.8 or 78.2-degree seat tube angle, resulting in a 29, 24 or 19mm bottom bracket drop (size medium) to fine-tune handling for trail conditions, riding style and rear-wheel size.
Rear wheel options
Riders can choose either the stock 27.5-inch rear wheel or switch to 29. The larger 29-inch option improves stability and roll-over capabilities, while 27.5 delivers a more agile, snappier feel. It’s a quick and easy way to adjust the bike’s handling and feel.
Technical specifications
| Size | S, M, L, XL |
| Colours | Mercury/Raw Carbon |
| Frame | Advanced-Grade Composite front and rear triangles, 160mm Maestro suspension, flip chip 3 position, 12x148mm thru-axle, 27.5 or 29-inch rear wheel compatible, integrated downtube storage, 55mm Chainline |
| Fork | Fox 38 Factory, 170mm, GRIP X2 damper, 15x110 Kabolt X, 44mm offset, custom tuned for Giant |
| Shock | Fox Float X2 Factory, 2 position, custom tuned for Giant |
| Handlebar | Giant Contact TR35, alloy, 35mm |
| Grips | Giant Tactal Pro Single lock-on |
| Stem | Giant Contact SL 35 S:40mm, M:40mm, L:40mm, XL:40mm |
| Seatpost | Giant Contact Switch AT dropper, adjustable travel, remote S: 110-140mm travel / 30.9 x 395mm M: 140-170mm travel / 30.9 x 470mm L: 170-200mm travel / 30.9 x 530mm XL: 170-200mm travel / 30.9 x 530mm |
| Saddle | Giant Romero SL |
| Pedals | N/A |
| Shifters | SRAM AXS Pod, discrete clamp, 1x12 |
| Front Derailleur | N/A |
| Rear Derailleur | SRAM GX Eagle T-Type AXS |
| Brakes | TRP EVO DH-R, hydraulic, TRP 2.3mm rotors [F]220mm, [R]200mm |
| Brake Levers | TRP EVO DH-R |
| Cassette | SRAM GX, T-Type 10x52 |
| Chain | SRAM GX T-Type |
| Crankset | SRAM GX T-Type, 32t, 55mm chainline S:165mm, M:170mm, L:170mm, XL:170mm |
| Bottom Bracket | SRAM DUB, press fit |
| Rims | Giant TRX Hookless Tubeless ready Carbon Fr: 29", Rr: 27.5" 30mm inner width |
| Hubs | Giant TRX MTB Alloy Hub, 6 Bolt, 110x15 [F] / 148x12 SRAM XD Drive Body Pawl Driver (Pawl 36x2 T) Thru-axle [R] |
| Spokes | Sapim Laser |
| Tires | [F] Maxxis Assegai 29x2.5 WT, 3C MaxxTerra, EXO+, TR [R] Maxxis Minion DHR II 27.5x2.4 WT, 3C MaxxTerra, DD, TR tubeless |
| Extras | Tubeless prepared, 2.5" max tyre size, 36t max chainring size, MRP AMG CS chain guide, 3M tailgate protector |
| Weight | The most accurate way to determine any bike’s weight is to have your local dealer weigh it for you. Many brands strive to list the lowest possible weight, but in reality weight can vary based on size, finish, hardware and accessories. All our bikes are designed for best-in-class weight and ride quality. |
