New Wilier Filante SLR ID2 2026 in Review – Race Refinement To Squeeze Out Those Final Watts

With the new Filante SLR ID2, Wilier present the latest evolution of their popular Italian race machine, once again tuned uncompromisingly to maximum performance. But the 2026 Wilier Filante SLR ID2 goes one step further, aiming to squeeze out every last watt from the rider-bike setup with an exclusive aero package. So how does it perform in the real world?

“The fastest version of yourself” – that’s the slogan Wilier are using to promote their new Filante SLR ID2. And with a claim like that, expectations are high. But what does it really take to build the fastest race bike? Wilier have proven they understand the racing world with the launch of the Rave SLR ID2 gravel racer. Now, have they managed to carry that know-how over to the new Filante? Considering the fact that it’s the most important model in their line-up, it’s no surprise that Wilier have obsessed over every tiny detail, fine-tuning the Filante SLR ID2 for both the Groupama–FDJ UCI WorldTeam and ambitious amateur riders alike. So how does this high-performance machine stack up in our test?

How Does the Rider-Bike System Make the 2026 Wilier Filante SLR ID2 Even Faster

The new Wilier Filante SLR ID2 is built around the idea of seamless integration between rider and bike – easier said than done. To create the perfect bike, you need the perfect components, and at Wilier, many of those are sourced in-house. That approach isn’t entirely new, other major brands also rely on in-house components, but Wilier take things a step further. Their sister company Miche don’t just supply the wheels but also provide many of the smaller components like the computer mount, thru axles, bottom bracket, and even the centre lock rings for the brake rotors, meticulously optimised for weight and performance.

Miche handle the entire development process in-house, with their own team of engineers and production facilities based in Italy. The short distance between the two companies allows for even tighter integration between Wilier and Miche products. The Miche Kleos RD 50 carbon wheels feature 50 mm deep rims with a 21 mm internal width, delivering an impressive level of compliance and race-focused efficiency. Our test bike came equipped with the Team Edition version, easily recognised by its subtle anthracite finish.

Aero Down to the Finest Detail – All the Updates on the New 2026 Wilier Filante SLR ID2

Entirely new, yet unmistakably part of the Filante family: the latest iteration still prioritises a high stiffness-to-weight ratio, which the previous Filante SLR ID1 certainly delivered in our 2025 road bike group test, when we went searching for the fastest race machine. The aero optimisation is still there, too, but this time it goes even deeper. The classic aerodynamic frame design with a low front end, aero-optimised fork and slim rear triangle is now complemented by widely flared seat stays and a distinctive fork crown. However, you can clearly trace the Filante design language in the details, from the characteristic seat stay shape to the triangular junction between top and seat tube.

Wilier are also chasing marginal gains with their integrated, aerodynamically optimised bottle cages and proprietary bottles. At first glance, the setup looks nearly identical to that on the new Trek Madone SLR 9, but a closer inspection reveals some key differences. Wilier add an extra spacer between the frame and the bottle cages to ensure a smoother, more aerodynamic transition. Unfortunately, that means reduced capacity, but if the 550 ml aero bottles aren’t enough, you can switch to standard round bottles, although only the rear cage will accommodate large bottles due to the design. One thing that hasn’t changed, though, is the limited day-to-day practicality of the aero bottles. Because of their unique shape, they can’t stand upright on their own, and the narrow openings make them tricky to fill with electrolyte powder and the like.

To complete the package, Wilier have fitted the new 2026 Filante SLR ID2 with a redesigned cockpit. The carbon Wilier F Bar ID2 cockpit blends in seamlessly with the frame’s paint job and features classic, deep-set drops for a traditional racing position. It also features a removable front derailleur mount with an aero cover for riders who prefer a 1x setup. Wilier have come up with an elegant solution for Shimano’s power meter too, with a dedicated cut-out for the required magnet. And to future-proof the new 2026 Filante SLR ID2, the frame now comes with a UDH (Universal Derailleur Hanger) dropout.

The New 2026 Wilier Filante SLR ID2 in Detail

The 2026 Wilier Filante SLR ID2 on test came specced with SRAM’s top-tier Red AXS 2×12 groupset, including a power meter. Like all build options, it features the full set of Miche and Wilier components: Miche Kleos RD 50 wheels fitted with 28 mm Vittoria Corsa Pro tires, the Wilier F Bar ID2 cockpit, and the aero kit with integrated bottle cages and matching bottles. Our test bike tipped the scales at 7.3 kg and comes in at € 12,900. If needed, the Filante ID2 can accommodate up to 34 mm wide tires.

Wilier offer eight other builds, all equipped with a one-piece cockpit and the aero kit, with the option of adding a power meter. The entry-level builds start at € 9,700 or € 9,900, fitted with either Shimano ULTEGRA Di2 or SRAM Force AXS groupsets. For those who want a custom build, the frameset is available for € 5,800, while the most exclusive build features the Campagnolo Super Record 13 groupset and costs € 13,100.

The Geometry of the 2026 Wilier Filante SLR ID2

The geometry of the Wilier Filante SLR is clearly aimed at racing and mirrors that of the Wilier Verticale SLR. With a stack-to-reach ratio of 1.42, the riding position is low and efficient, ideal for launching attacks on the flat or pushing hard on the climbs. A 72.5° head angle paired with short chainstays delivers sharp, precise handling and explosive acceleration out of corners, while the near one-metre wheelbase ensures confident stability at high speeds. The 73.5° seat angle places you in a central position over the bottom bracket. The result is a no-compromise race bike that blends agility and stability, even when you’re going full gas.

Size	XS	S	M	L	XL	XXL
Top Tube	508 mm	526 mm	542 mm	559 mm	576 mm	590 mm
Seat Tube	450 mm	480 mm	510 mm	530 mm	550 mm	570 mm
Seat Angle	75.2°	74.5°	74°	73.5°	73°	73°
Chainstay	411 mm	411 mm	411 mm	411 mm	413 mm	413 mm
Head Tube	99 mm	115 mm	132 mm	149 mm	166 mm	183 mm
Hedd Angle	70.6°	71.5°	72°	72.5°	73°	73.5°
Reach	373.5 mm	380 mm	386.5 mm	393 mm	400 mm	408 mm
Stack	505 mm	523 mm	541 mm	559 mm	577 mm	595 mm
Wheelbase	980.5 mm	985.1 mm	992.9 mm	1000.4 mm	1010.1 mm	1018.5 mm

Fast, Focused and Confident – the New 2026 Wilier Filante SLR ID2 in Review

So how does the Filante perform out on the road? Just a few pedal strokes in and it’s clear you’re on a next-generation race bike. It delivers agility, speed and impressive efficiency in equal measure. The central riding position and race-focused geometry demand an active riding style, but you get loads of control and a high level of confidence in return. When you put the power down, the Filante SLR ID2 responds instantly, yet stays composed and planted, excelling on sprints and in rolling terrain. While it accelerates efficiently on steep climbs and when powering out of tight corners, it’s not the snappiest bike on the market.

The Filante SLR ID2 holds its own on the descents. Its precise steering lets it carve through tight corners with confidence and handles high-speed sections without so much as a hint of nervousness. It remains composed and confidence inspiring even when you’re not pushing the pace. Furthermore, it’s impressively efficient on the flats. While the subjective feeling of speed doesn’t always tell the truth, there’s no doubt that the aero innovations on the Filante SLR ID2 are more than just marketing gimmicks.

Despite its race-focused character, the bike also delivers in terms of compliance, surprisingly so for an aero race bike without any comfort-focused features. The frame effectively absorbs unwanted road buzz, resulting in a well-balanced ride when combined with the added compliance of the Miche wheels and the ergonomic cockpit with its 37 cm tops and 40 cm drops.

Tuning tip: Go for round, standard bottles for everyday rides, when you’re not counting every second on the clock.

The only real downside? The aero bottles. They won’t stand upright on their own, the narrow opening makes them tricky to fill with electrolyte powder, and cleaning them isn’t exactly straightforward either. Inserting them into the cage also takes a bit more precision than with standard bottles, as they need to be aligned just right. That said, once you’ve got the hang of it, it becomes second nature, even without looking.

All things considered, Wilier have delivered a truly race-ready, high-speed machine with the new 2026 Filante SLR ID2. Its biggest strengths lie in its incredibly balanced handling and versatile ride characteristics.

Who Is the 2026 Wilier Filante SLR ID2 For?

The Filante SLR ID2 is Wilier’s ultimate race bike, developed first and foremost for the WorldTeam pros at Groupama–FDJ. But that doesn’t mean amateur riders lose out? Not at all. The Filante is far from being razor-sharp and punishing, combining versatile ride characteristics, fun and responsive handling, and high efficiency in a well-rounded, premium package. It’s a bike for anyone demanding a sleek all-round aero machine with that extra touch of aerodynamic performance.

Conclusion on the 2026 Wilier Filante SLR ID2

With the new Filante SLR ID2, Wilier present a race-focused speed machine that stands out for its versatile handling and impressive efficiency. It comes with a proprietary aero system featuring custom bottles, though without neglecting those signature Wilier details we’ve come to expect, of course. Combined with high-end Miche components, it all adds up to a premium package that’s well worth considering for any ambitious rider with a focus on aerodynamic performance – a worthy evolution of the Filante series.

More information at wilier.com

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Words & Photos: Calvin Zajac