Prototype Giant and Liv gravel race bikes spotted ahead of Unbound Gravel

Giant and its sister brand Liv have unveiled prototype gravel race bikes ahead of the upcoming Unbound Gravel event, signalling a fresh wave of innovation in their off-road line-ups. The new machines appear to be evolutions of the existing Giant Revolt model, with subtle but purposeful frame updates aimed at enhancing speed and aerodynamics. These prototypes were spotted at the race expo, ridden by privateers including Brendan Johnston, Cole Paton, and Tessa Neefjes, among others, offering an early glimpse of the brand’s latest gravel technology in a competitive setting. The updated frames show several notable changes, such as a deeper and shorter head tube, a revised top tube and seat tube junction, and a new scalloped seatpost designed to improve rider comfort. The rear triangle has been modified to accommodate a Universal Derailleur Hanger (UDH), reflecting current industry standards for gravel bikes. Interestingly, the adjustable flip chip feature that allowed riders to alter wheelbase length and tyre clearance on the previous Revolt model appears to have been removed, although tyre clearance is still expected to support at least 50mm tyres, maintaining versatility for varied terrain. Beyond the frames, the prototypes also incorporate new componentry that hints at further performance gains. The wheels, possibly a new gravel-specific model resembling Cadex Ultra wheels, feature integrated carbon spokes and aerodynamic rims, while the integrated cockpits and D-shaped aero seatposts suggest a focus on reducing drag without compromising comfort. Riders have been seen running large chainrings—close to 50 teeth—paired with a mix of Shimano and SRAM drivetrains, indicating a preference for high gearing suited to fast gravel racing. The Liv prototypes share many design cues with the Giant models, including colour coordination and ample tyre clearance, with some fitted with Maxxis Aspen tyres tailored for challenging conditions. The presence of bottle mounts under the top tube, rather than on the fork, points to an emphasis on aerodynamics and rider convenience during intense racing efforts. Although brand representatives have remained tight-lipped on specifics, these developments clearly position Giant and Liv to compete strongly in the evolving gravel racing market. As Unbound Gravel commences, these prototypes will be put to the test in what is often a brutal and muddy environment, providing valuable real-world feedback ahead of any official product launches. The new designs underscore the ongoing trend in gravel cycling towards faster, more aerodynamic machines that do not sacrifice durability or comfort. Observers and enthusiasts alike will be keen to see how these bikes perform under race conditions and what refinements Giant and Liv might introduce in the near future.