The Sandman 7 features Shimano's GRX820 12-speed mechanical groupset, part of Shimano's second-tier gravel component lineup that combines technologies from both their Ultegra road and Deore XT mountain bike families. The 2×12 drivetrain uses a gravel-optimized 46-30T crankset paired with the Shimano CS-R8100 11-34T cassette, providing 24 distinct gear combinations. This configuration prioritizes closely-spaced gear steps for maintaining consistent cadence across varied terrain—whether cruising flat gravel roads, navigating rolling hills, or tackling steep climbs. The GRX RD-RX820 rear derailleur incorporates Shadow RD+ chain stabilization technology, using an adjustable clutch mechanism to minimize chain slap and improve chain retention on rough surfaces.

The complete GRX820 hydraulic brake system uses ST-RX820 dual-control levers integrated with BR-RX820 calipers, matched with Shimano's RT-CL800 rotors featuring Ice Technologies Freeza construction. These rotors use an aluminum carrier designed to resist heat deformation during extended braking. The brake calipers include increased pad clearance compared to previous GRX generations, reducing brake rub after heavy use. The GRX820 shifters feature Shimano's textured anti-slip coating on the lever blades and hoods, borrowed from their fishing product division for improved grip in wet conditions. The lever shape has been refined with a marginally narrower body to accommodate a wider range of hand sizes, particularly optimized for flared handlebars common in gravel cycling.

Built on a TORAY T800 carbon frame and fork, the Sandman 7 achieves a complete weight of 9.6 kg. The RINOS carbon handlebar and seat post work with the aluminum headset to create structural integrity while managing vibration transmission. The GRX820 crankset uses Shimano's Hollowtech II technology—a construction method that provides stiffness and power transfer efficiency while minimizing weight. The 46-30T chainring combination uses a +2.5mm wider chainline compared to standard road groupsets, specifically designed to accommodate wider gravel tires and improve mud clearance. The drivetrain runs on a Shimano CN-M8100 12-speed chain, originally developed for mountain bike use, featuring extended link plates for enhanced chain engagement and retention.

The wheelset pairs 38mm deep aluminum rims with Novatec 28H hubs, wrapped in CST 700×40C tires with sidewall protection and 60mm Presta valves. The bike includes 26 mounting points distributed across the frame for bikepacking bags and accessories. Available in five frame sizes (50-58 cm) across four colorways, the Sandman 7 accommodates riders from 155 cm to over 190 cm in height. The GRX820 groupset delivers mechanical shifting precision without electronic complexity or battery requirements, making it well-suited for multi-day gravel adventures, competitive events, or mixed-terrain training rides. Manufactured in the EU with included assembly tools and manual.