2021 Wilier Filante SLR | Aero and light Italian superbike

The Wilier Filante SLR is a new flagship among disc racing bikes that is supposed to be both aerodynamic and light.

It ties in with the Wilier Cento10Air and Cento10Pro aero bikes, but was designed to bring the Zero SLR closer to the brand on the scales, with the frame weighing 870g.

Complete bikes start at £ 7,470 / € 8,300 and cost £ 11,160 / € 12,400 to build with Campagnolo Super Record EPS and Bora WTO 33 disc wheels. Get £ 4,500 / € 5,000 back with a frameset.

2021 Filante SLR: Aero and light without sharp edges

The Filante SLR looks pretty stunning in that velvet red paint.

According to Wilier, the Filante SLR was developed with contributions from professionals such as Daniele Bennati, Jakob Fuglsang and Alexey Lutsenko.

According to the brand, the Filante SLR was designed to be as airy as possible, but with similar driving characteristics and weight figures as the Zero SLR. The frameset is designed to be on discs only and for electronic groups only.

Wilier does not make any specific statements about the extent of the aero improvements over the predecessors of the Filante SLR, but the motorcycle takes a somewhat new approach.

While Kammtail tube shapes are used throughout as before, Wilier has rounded the corners of the Filante’s rear edges more, which reduces air resistance under real conditions.

It also has the side effect of reducing the amount of material required and thus saving weight.

Claudio Salomoni from Wilier says: “Of course we developed Filante in the wind tunnel, you cannot avoid using it, but the wind tunnel has its limits.” Real yaw angles are constantly changing, and turbulence from other drivers can also be a factor, he explains.

Another key feature of the Filante SLR is its extremely wide fork leg mount, which creates plenty of space on both sides of the front wheel and apparently further reduces drag.

The spaced apart seat stays allow an unobstructed flow of air.

This is reflected in the very far apart seat stays. Seen from the front, these are designed so that they are completely covered by the fork, which suggests that air could flow through both of them continuously (although the rider is of course also involved here). Think of it as a less extreme version of the Hope HB.T ​​racing bike.

Earlier Wiliers have asymmetrical tail ends to counter the asymmetrical forces that the powertrain creates. The Filante SLR is also noticeably asymmetrical at the front – the left fork leg is significantly larger than the right to withstand the stresses of braking.

The frame of the Filante SLR is said to weigh 870 g (size not specified), while the fork weighs 360 g. The matching seat post supposedly weighs 165 g, while the one-piece carbon cockpit should weigh 365 g. Overall, Wilier claims a weight saving of 11 percent compared to the Cento10Pro.

Fit for everyone and fully integrated

Wilier Filante SLR on a wet UK road
We have a Filante SLR to test and will give you a full review in the near future.
Warren Rossiter / Instant Media

The Filante SLR is available in six sizes. The size-dependent hoses ensure a constant ride quality.

There are five cockpit options with unusual-sounding stem lengths of 88 mm, 101 mm, 114 mm, 127 mm and 140 mm. Each length is matched to a specific bar width (from 400mm to 440mm), so you can’t opt ​​for a 140mm stem and the narrowest 400mm bar, for example.

One-piece cockpit
The Filante SLR gets a one-piece carbon cockpit with completely hidden cables.

The unusual lengths are apparently the result of Wilier’s efforts to offer a very even distribution of fits across the size range with minimal jumps between options.

As part of this, the frameset is designed for use with up to 35mm headset spacers, while the seat post is available in zero and 15mm recoil options.

The geometry of the Filante SLR is classy.
The geometry of the Filante SLR is classy.

The Filante’s geometry is as racy as expected, with a medium with a reach of 388mm and a stack of 538mm.

Pretty well, every high-end bike launched this year has extensive integration and the Filante SLR is no exception.

Red bike head tube
Thanks to a new warehouse concept, Wilier has switched to round handlebars.

The wiring is completely internal and Wilier has updated its approach here. Earlier models used a D-shaped steerer tube to make room for the cables.

The Filante SLR returns to a round steerer tube, which the brand says is stiffer and frees up the space required by using custom designed “super fine” headset bearings that take up less space.

Wilier Filante SLR 2021 range and pricing

Wilier Filante SLR rot
Wilier Filante SLR in rot.

Wilier Filante SLR schillerndes Grau.
The dazzling option.

Wilier Filante SLR black
The traditional black option.


The Filante SLR will be available in three colors and different designs. These are grouped according to the drive train as follows, with the price depending on the choice of wheelset. The pricing in other currencies must be confirmed:

Campagnolo Super Record EPS

  • Campagnolo Bora WTO 33 Disc Dark: £ 11.160 / € 12.400
  • Campagnolo Shamal Carbon C21: £ 10.080 / € 11.200

Shimano Dura-Ace Di2 R9170

  • Wilier ULT38KT / CeramicSpeed: £ 10.170 / € 11.300
  • Wilier SLR 42 KC carbon: £ 9.270 / € 10.300
  • Shimano RS170: 9.300 €

SRAM Red eTap AXS Disc 2 × 12

  • Wilier ULT38KT / CeramicSpeed: £ 10.260 / € 11.400
  • Wilier SLR 42 KC carbon: £ 9.360 / € 10.400

Shimano Ultegra Di2 R8070

  • Wilier SLR 42 KC carbon: £ 7.380 / € 8.200
  • Shimano RS170: £ 6.480 / € 7.200

SRAM Force eTap AXS 2 × 12 with power meter

  • Wilier SLR 42 KC carbon: £ 8.100 / € 9.000

SRAM Force eTap AXS 2 × 12

  • Wilier SLR 42 KC carbon: £ 7.470 / € 8.300

SRAM Force eTap AXS 2 × 12 wide

  • Wilier SLR 42 KC carbon: £ 7.470 / € 8.300

Wilier Filante SLR Frameset

  • Including cockpit and seat post: £ 4.500 / € 5.000

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