Unbound Gravel weekend is here and with it come the carefully planned leaks and teasing of new bikes and parts. This time, its Giants turn, and the Taiwanese behemoth has turned up with what appears to be a new Revolt gravel bike. Although much of the talk leading up to the race has been about Scotts prototype 32in gravel bike, Giants new bike looks set to use 'standard' 700c / 29in wheels. Teased on Instagram, along with what looks to be a set of unreleased Cadex gravel wheels with carbon spokes, Giant says simply these are a few prototypes weve been working on. We believe it could be the 2027 Giant Revolt Advanced SL, however, as a model with such a name was added to the UCIs list of approved framesets late last year. If thats the case, it would mark the first time Giant has made a top-tier, Advanced SL version of its Revolt gravel bike and this likely means it features a premium, and likely lighter (and more expensive) carbon fibre construction. The Revolt gets racier Giant's new gravel bike looks to be racier than its existing one. Giant The most obvious changes, compared to the existing Giant Revolt Advanced Pro, appear to be a general move towards a lighter, more aggressive and racier design. The front-end stack height, for example, appears to be reduced significantly, presumably for a more aggressive fit. The frame shapes themselves also appear to have been slimmed down and simplified slightly, although its not clear whether Giant has made any tweaks to the frames aerodynamics beyond the truncated aerofoil shapes seen on the head tube and fork legs. New bike day always brings out the smiles. Giant The bikes on show also forgo mounting points on the fork, and integrated internal storage on the down tube because the hatch appears to be missing beneath the down tube water bottle cage. There is, though, a third set of bottle bosses inside the frames main triangle, enabling riders to run three 750ml bottles within the frame at least on the pictured frame sizes. It appears the frame may lack top-tube mounts, however, because we can see riders with top tube bags look to have used cable ties for mounting these. UDH is in, adjustable dropouts are out The new bike adopts SRAM's UDH rear dropout. Giant The prototype frame also adopts SRAMs Universal Derailleur Hanger dropout design, which enables compatibility with SRAMs Full Mount rear derailleurs (such as those found in its latest mountain bike and gravel groupsets). This also means the adjustable dropouts of the current Revolt have been dropped, though. On the current Revolt, these flip chip dropouts enable the position of the rear wheel to be set in a short or long position, to adjust the bikes wheelbase, rear tyre clearance and handling characteristics. It's no surprise to see clearance for XC tyres on this new bike. Giant Given one of the builds pictured features Continentals Dubnital cross-county mountain bike tyres, we can surmise this new bike features at least 50mm of tyre clearance, because thats the smallest size offered by the German brand for that tyre. This looks to have been achieved by dropping the driveside seatstay slightly compared to the existing Revolt, and perhaps also by making the new frame 1x-only. There doesnt appear to be a mounting point for a front derailleur hanger and all the pictured builds feature single-chainring setups. New Cadex wheels and components Are those new Cadex gravel wheels? We think so. Giant As well as a new frameset, it looks as if Giant and its high-end component brand, Cadex, have some new wheels and parts in the works. The wheels featured on the bikes, for example, look to be a new set of Cadex aero gravel wheels with carbon spokes. These feature rims that look to be deeper and likely wider than Cadexs existing options, such as the AR 35s, while the carbon spokes also look to be larger, with a deeper bladed section. The hubs look to use a similar bonded construction to the Cadex Max 50 wheels. Giant From what we can see of the hubs, it appears these wheels may feature the ultra-light construction seen on Cadexs Max 50 wheels, which see the carbon spokes bonded directly to the carbon hub shells. Elsewhere, the new bikes also feature Cadex integrated cockpits, instead of the two-piece setups found on existing Revolt Advanced Pro builds, and what could be a new version of Giants D-Fuse seatpost. Instead of an aero profile, this seatpost uses a round (likely 27.2mm) shape, narrowing at the top for increased flex and improved comfort on rough terrain. When will this new Giant gravel bike launch? A 2027 Revolt Advanced SL has appeared on the UCI's approved frame's list since last year. UCI Given Giants post says these are prototype components, its fair to imagine an official launch may not be imminent. As noted, though, a 2027 Giant Revolt Advanced SL features in the UCIs list of approved framesets (meaning framesets that have been approved as compliant with its standards and can therefore be used in its sanctioned events) and bikes typically launch just ahead of their stated model year. Given this, and the fact the bike is clearly developed enough to have been approved by cycling's international governing body, and raced at the most important gravel event of the year, wed put our money on this bike being launched fairly soon.