Ultimate Aero Gravel Bike or Workshop Headache?
The Wilier Rave SLR ID2 has quickly become our bestselling gravel bike at Mapdec Cycle Works. Built as an unashamed, high-speed aero race bike, it delivers serious performance—and a few distinct workshop quirks. Here is our honest, mechanic's take on the Wilier Rave SLR ID2, covering frame geometry, workshop practicality, and ride feel.
At a Glance: Key Specifications & Build
- Target Purpose: Aero Gravel Racing / Fast All-Road
- Frame Weight: 1.22 kg (Size Large, includes hanger and bosses)
- Tire Clearance: Massive (Fits up to 52mm actual width; tested with 50mm tires on 27mm internal Miche Graff Era wheels)
- Cockpit: Integrated Wilier Z-Bar / Accu-Fit compatibility (Ritchie-compatible top cap)
- Price Range: Options from £4,900 up to £10,000+ (SRAM Red AXS build featured)
- Mounting Options: 3 sets on down tube, 2 on seat tube, 2 top tube (No traditional bike-packing rack mounts)
The Mechanic's Verdict: Workshop Positives & Weak Points
While the Rave SLR ID2 is engineered for raw speed, running a bike shop means looking beyond the glossy paint to see how it holds up on the workstand.
What Wilier Got Right
- Reinforced Headset Races: Metal inserts top and bottom protect the carbon inside the headtube, keeping the frame durable under heavy wear.
- Smooth Internal Carbon: Super-clean internal layup around the seatpost and junction points.
- Elevated Brake Mounts: Brake mounts sit slightly raised from the frame, allowing workshop tools to face paint overspray easily without damaging the finish.
- Low Bottom Bracket Drop: Offsets large 50mm+ tire volume, keeping your center of gravity low without sacrificing pedal clearance.
The Workshop Criticisms
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The Bottom Bracket (PF41): Wilier uses a PF41 press-fit standard, often applied with a heavy clear coat over the shell face that requires careful facing in the shop. Additionally, PF41 is sub-optimal for the 29mm SRAM DUB spindles that dominate modern gravel setups. A PF46 or T47 standard would be a welcome upgrade.
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Headset Bearing Sizing: The stock slim black-oxide treated bearings perform well, but a bike designed for mud and wet gravel deserves standard stainless steel bearing options for long-term durability.
Trail Performance: How Does It Ride?
Despite its aggressive geometry and integrated aero features, the Rave SLR ID2 balances top-tier speed with surprising comfort.
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Zero Toe Overlap: Even with a size 45 shoe, 170mm cranks, and massive 50mm tires, there is over 1 cm of toe clearance—a huge win for tight, technical maneuvers on a short-wheelbase race frame.
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Handling & Stability: The low bottom bracket makes high-speed cornering and rocky climbs feel planted, while the rear end absorbs chatter far better than expected from a stiff aero build.
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Bar Ergonomics: The integrated cockpit features flat, comfortable top transitions. While a slightly wider flare on the drops would aid descending, the road-inspired profile keeps your body in a narrow, slippery position.
Experience the Wilier Rave SLR ID2 at Mapdec
The Wilier Rave SLR ID2 proves that an aggressive, lightweight gravel race bike can still be confidence-inspiring, stable, and fun to ride off-road.
Want to test it out yourself? Our Special Edition demo build is kept permanently in the Mapdec stable. Book a test ride or visit the Mapdec Cycle Works workshop to see it in person!