adlar gravel bike Wilier Adlar GRX Di2 Adventure Gravel Bike

adlar gravel bike Wilier Adlar GRX Di2 Adventure Gravel BikeWilier makes two very different kinds of gravel bikes. The Rave SLR ID2 is built to race. The Adlar is built to go. Not to podium, not to set a segment time to cross borders, carry gear, sleep somewhere new, and keep going the next day. It's a carbon bikepacking platform with MTB inspired geometry, a frame reinforced for 35kg of additional load, comprehensive mounting architecture, and the kind of design decisions that only make sense if you've

Wilier makes two very different kinds of gravel bikes. The Rave SLR ID2 is built to race. The Adlar is built to go. Not to podium, not to set a segment time — to cross borders, carry gear, sleep somewhere new, and keep going the next day. It's a carbon bikepacking platform with MTB-inspired geometry, a frame reinforced for 35kg of additional load, comprehensive mounting architecture, and the kind of design decisions that only make sense if you've actually thought about what riding fully loaded across varied terrain for multiple days requires.

At $5,350 with Shimano GRX Di2, it's one of the most capable adventure gravel bikes available at any price.

Reinforced Carbon Frame — Built for Loads, Not Podiums

The Adlar's carbon frame weighs 1,100g — heavier than Wilier's race-focused frames, and intentionally so. The additional weight is structural: Wilier has reinforced the frame to handle up to 35kg of additional load beyond the rider's weight. That number covers a full bikepacking setup — frame bag, handlebar harness, seat pack, fork bags — without any concern about fatigue cracks developing over thousands of loaded kilometers. Most gravel frames are tested and rated for the rider's weight only. The Adlar is rated for the rider plus everything they're carrying.

The carbon fork adds 470g and features an extended axle-to-crown length for two reasons: first, it creates clearance for tires up to 52mm on 700c wheels or 29x2.0" mountain bike tires, opening up terrain that standard gravel forks can't handle. Second, it maintains suspension fork compatibility for riders who want up to 40mm of travel on rough touring routes — a capability almost no carbon gravel fork offers. The fork also integrates dynamo hub cable routing through the right leg, so riders building a self-sufficient long-distance setup with a dynamo hub and lighting system have a clean path for the cable from the start.

The bottom bracket uses a PF86 press-fit shell and the drivetrain is 1x-only throughout the range. Dropper post compatibility is built in, which matters more on a loaded adventure bike navigating technical descents than it does on a race bike where you're unloaded and can move around freely.

MTB Geometry — Stable Under Load, Confident on Technical Terrain

The Adlar's geometry is the most honest statement of its purpose. A 70° head tube angle across the entire size range is slack by any gravel standard — closer to a trail mountain bike than a race gravel bike, and deliberately so. When a bike is carrying 15-20kg of gear distributed across frame bags, fork bags, and a handlebar harness, the handling dynamics change substantially. Slack geometry keeps the front end stable under load, reduces the tendency to wander on rough surfaces, and gives the rider more control in technical terrain where a fully loaded bike requires more effort to steer than an unloaded one.

The steep 74° seat tube angle on a medium keeps the rider centered over the pedals regardless of loading, which is critical on extended climbing with a heavy bike. Reach is 413mm on a medium — longer than most road-influenced gravel bikes, paired with a shorter stem to keep the steering direct and manageable. Wheelbase stretches to 1,065mm, providing the stability needed when descending loaded at speed on rough surfaces. Stack measures 586mm for a comfortable all-day position that doesn't punish you after eight hours in the saddle.

This geometry is borrowed from Wilier's mountain bike design team, and it shows in all the right ways. The Adlar doesn't feel like a road bike that's been told to carry luggage — it feels like a bike designed from the beginning to work best when there's a lot of weight on it.

The Mount System — Built for How Bikepackers Actually Ride

The Adlar's mounting architecture covers every attachment point a serious bikepacker needs. Inside the main triangle: two bottle cage mounts plus an additional mount under the down tube for a third bottle or tool bag. On the top tube: dedicated bag mounts for a top tube bag. On each fork leg: three-pack anything cage mounts — six fork mounts total — for water, food, small gear, or whatever the terrain demands.

The rack system is the Adlar's most considered feature. Wilier's optional low-rider racks mount directly to the 12mm thru-axles at both wheels rather than to the chainstay or seatstay. Thru-axle mounting transfers load directly to the strongest structural points on the bike, eliminating the flex and rattle that plague chainstay-mounted racks on rough terrain under heavy loads. The racks also integrate with a purpose-designed four-bag system from Miss Grape, Wilier's bikepacking partner — but the mount points are compatible with standard bag systems as well.

Fork dynamo cable routing, dropper post compatibility, and suspension fork clearance round out the practical specification. Every feature on this frame exists because someone thought through what a loaded multi-day trip actually requires and designed the answer into the carbon.

GRX Di2 — Electronic Shifting for the Long Haul

Shimano GRX Di2 is the right drivetrain for an adventure bike, and not just because of its gravel-specific ergonomics. On a long expedition, a mechanical drivetrain degrades over time as cables stretch, housing compresses, and contamination builds in the system. Di2 eliminates all of that — electronic actuation doesn't change as cables age because there are no cables to age. The shift quality you have on day one is the shift quality you have on day ten, whether you've ridden through rain, mud, or dusty fire roads in between.

The GRX 800 series runs 12-speed with a wide-range cassette suited to climbing loaded grades, and shift programming is adjustable via the Shimano E-Tube app. Battery life is measured in hundreds of kilometers — a USB-C charge before a long trip and you won't think about it again. For a bike built for days away from infrastructure, that reliability matters.

The Wilier Adlar GRX Di2 with alloy wheels is for riders who want to go further than a day ride allows, carry what they need to be self-sufficient, and trust the bike to hold up across whatever terrain connects the start to the destination. Available in Stone Dark Gloss and Bottle Green Gloss across five sizes from XS to XL.