Giant Reign 1 Mountain Bike (2025)

Push new limits on technical terrain with this enduro-ready carbon machine. With 160mm of Maestro rear suspension and a confidence-inspiring chassis, it devours rock gardens, drops, and rugged descents with total control. The three-position flip chip lets you fine-tune your geometry and switch between 27.5-inch and 29-inch rear wheels, giving you the freedom to optimise handling for every trail and every style of ride.

Key Performance Factors

Race-bred suspension

A Maestro rear suspension system with 160mm of travel 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 62.5, 63 or 63.5-degree head angle and corresponding 77.5, 77.9 or 78.3-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 the 27.5 option delivers a more agile, snappier feel. Its a quick and easy way to adjust the bikes handling and feel.