Wilier Rave SLR ID2 Red XPLR E1 Bike

The Wilier Rave SLR ID2 Red XPLR E1 Bike is what happens when a brand with deep roots in Italian road racing turns its full attention to gravel — and refuses to compromise. Wilier Triestina designed the Rave SLR ID2 as a pure gravel race machine, not a softened road bike with extra tire clearance. Every tube profile, every integration point, and every geometry decision was made with one goal: getting to the finish line of a gravel race faster. The result is a bike that weighs under 8 kg, slices through the wind with nearly 9% less drag than its predecessor, and clears tires up to 52mm wide. That combination of speed, capability, and sheer composure over rough terrain is what sets this Wilier gravel bike apart.

The frame is built from Wilier's HUS Mod carbon reinforced with Liquid Crystal Polymer — a construction method that brings the frame weight down to approximately 990g in size medium while maintaining the stiffness needed for hard accelerations. Wilier developed the Rave SLR ID2 using extensive CFD simulation and wind tunnel testing at their Innovation Lab, shaping NACA-profiled down tubes and fork legs inspired by the Supersonica SLR time trial bike. The payoff is real: 5.3 watts saved at 35 km/h compared to the previous generation. Over a 70 km gravel race at 350 watts, that translates to more than 50 seconds — free speed that costs you nothing but shows up where it counts.

Wilier's iD2 integration system routes all cables and hoses internally through a superslim headset bearing and into the monocoque carbon F-Bar ID2 cockpit. That cockpit deserves its own mention — it features O.E.F. (Optimised Ergonomic Flare), a 3cm orthogonal flare between the hoods and drops that gives you a more aero position on the hoods and better control when you're riding in the drops over rough ground. The Aerokit system, developed with Elite, integrates the bottle cages into the frame's aerodynamic profile, reducing drag by more than two-thirds compared to a standard bottle-and-cage setup. Combined with the AccuFit system — which offers over 420 fit configurations across six frame sizes, each just 2mm apart — the Rave SLR ID2 is as precisely tailored as it is fast.

This build pairs the frame with SRAM's flagship Red XPLR AXS E1 groupset — a wireless electronic 1x13-speed drivetrain with a 40T chainring and 10-46T cassette. That range covers everything from paved lead-outs to steep fire road climbs without the weight or complexity of a front derailleur. Hydraulic disc brakes with 160mm Paceline X rotors provide consistent stopping power in all conditions, and the Miche Graff Aero 48 carbon wheels — 48mm deep with an aero profile — carry the bike's speed-first philosophy through to the contact patch. Vittoria Terreno Dry 700x50c tubeless-ready tires round out a build that's as capable on hardpack singletrack as it is on fast gravel roads.

Design Benefits

1. Aero Efficiency Without Sacrificing Capability: The NACA-profiled tubes and TT-inspired fork deliver a measurable 8.9% drag reduction over the previous Rave SLR, saving 5.3 watts at 35 km/h. Unlike many aero frames that restrict tire size to achieve their numbers, the Rave SLR ID2 maintains clearance for 52mm tires — so you get real aerodynamic gains on the fast sections without giving up traction and comfort when the road turns rough.
2. Fully Integrated iD2 System: Internal routing through the superslim headset and monocoque cockpit eliminates external cables entirely, creating a cleaner aerodynamic profile and a bike that looks as fast as it rides. The integration goes beyond aesthetics — the F-Bar ID2's orthogonal flare positions your hands in a more aerodynamic stance on the hoods while improving leverage and control in the drops.
3. Massive Tire Clearance for a Race Bike: The jump from 42mm on the previous generation to 52mm on the Rave SLR ID2 opens up terrain that pure gravel racers couldn't previously access. With 2.1-inch MTB tire compatibility, you can set this bike up for everything from fast, dry gravel races on slicks to chunky mixed-terrain events on knobbies — all on the same frame.
4. Precision Fit Through AccuFit: With over 420 possible fit configurations across six frame sizes — each adjustment just 2mm apart — the Rave SLR ID2 can be dialed to your body with a level of precision that most production bikes cannot match. For a bike built around racing, that fit precision translates directly to sustained power output and comfort over long efforts.

Final Take

The Wilier Rave SLR ID2 Red XPLR E1 is built for riders who take gravel racing seriously and want every advantage the bike can give them. It is fast on pavement, planted on loose terrain, and aero in a way that most gravel bikes have not even attempted. With SRAM's top-tier 1x13 drivetrain, deep-section carbon wheels, and a frame that weighs under a kilogram, this is a gravel race bike with nothing held back.