Wilier TriestinaSupersonica SLR
Wilier's fastest time trial frame, developed in about nine months with Groupama-FDJ and Stefan Küng after the team signed with Wilier in August 2023. Wilier says it is almost 16% more aerodynamically efficient than the Turbine SLR. Stefan Küng debuted it at the 2024 Tour de Suisse. It has an integrated seat mast, internal cabling, room for 28 mm tyres and the option of made-to-measure titanium or carbon extensions from a forearm scan. Wilier lists it under Time Trial / Triathlon, and the range includes triathlon builds.
- From
- €22,800€22,800€22,800
- Builds
- 4
- Sizes
- 3
- Frame weight
- 1,450 g3.2 lb
Design sketch, generated from the manufacturer's photo
Our verdict
Overall
out of 100, average of 6 categories
A WorldTour time-trial bike at the top of the market, for racers who want Wilier's fastest frame, Dura-Ace on every build and optional made-to-measure extensions. It is heavier than the Turbine SLR, has no storage, comes in only three sizes, and the cut-to-length seat mast makes it awkward to resell or pack.
Scored Oct 2026
- + Aero-first design
- + Top-tier build kit
- − Expensive
- − Proprietary parts, harder to travel with or service
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 94/100
- Frame
- 78/100
- Components
- 94/100
- Hydration & storage
- 38/100
- Fit
- 68/100
- Practicality
- 46/100
- Price
- 5/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Not counted in the overall score for time-trial bikes: UCI rules limit integrated hydration and storage. Hydration and storage in the frame
Sizes and adjustment range
Travel, standard parts, servicing
From the cheapest complete-bike MSRP
Bike duel
Frame & platform
Frame & fork
- Frame material
- Carbon monocoque
- Fork material
- Carbon monocoque
- Frame weight
- 1,450 g3.2 lb
- Fork weight
- 550 g19.4 oz
- Weight measured on
- Wilier figures, ±5%
- Frame sizes
- XS/S, M, L/XL
- Colours
- T17 Black/Gold (matt), T16 Silver/Velvet Red (gloss), T15 Groupama-FDJ
- Also available as
- Turbine SLR (lighter previous TT frame) and Turbine SL (triathlon-focused) in the same range
- UCI frame approval
- UCI-approved as 'Supersonica' (frame and fork code WILIER-021), sizes S to L (3); the list gives two approval dates, 29.04.2024 and 21.08.2024 (UCI list version 2026.10.02)
Compatibility & standards
- Brake type
- Hydraulic disc
- Wheel size
- 700c
- Max tire width
- 28 mm
- Bottom bracket standard
- Press-fit 86.5x41
- Drivetrain compatibility
- Electronic groupsets (sold with Shimano Dura-Ace Di2)
- Cable routing
- Fully internal
Hydration & storage
- Integrated hydration
- No
- Integrated storage
- No
Fit & adjustability
- Aerobar system
- Supersonica basebar with Profile Design ASC Pro extensions, or custom extensions
- Extension options
- Profile Design ASC Pro / 52 ASC, or made-to-measure extensions in 3D-printed titanium or laminated carbon based on an optical forearm scan
- Seatpost type
- Integrated aero seat mast, cut to length
Aerodynamics
- Manufacturer aero claims
- Almost 16% more aerodynamically efficient than the Turbine SLR (Wilier wind-tunnel comparison at 50 km/h, 0.3% turbulence)
- Testing method
- Two prototypes, more than 50 hours of CFD and about 30 hours split between the Silverstone wind tunnel, a Swiss velodrome and road tests in Belgium
Travel, maintenance & warranty
- Proprietary parts
- Supersonica basebar, integrated seat mast, custom extensions
- Sold via
- Wilier dealers
Photos
Design sketches
Builds & components
Highlighted rows differ between builds. Green marks the best value.
Supersonica SLR Dura-Ace Di2 + power meter (Kleos RD SPX3 / Crono lenticular) | Supersonica SLR Dura-Ace Di2 (Kleos RD SPX3 / Crono lenticular) | Supersonica SLR Dura-Ace Di2 Triathlon (Kleos 67/85) | Supersonica SLR frameset kit | |
|---|---|---|---|---|
| Overview | ||||
| Price (MSRP) | €22,800€22,800€22,800 | €22,000€22,000€22,000 | €18,000€18,000€18,000 | €10,000€10,000€10,000 |
| Weight | 9.45 kg20.8 lb | 9.4 kg20.7 lb | — | — |
| Type | Complete bike | Complete bike | Complete bike | Frameset |
| Notes | Weight ±5% per Wilier, size not stated. Code E555IMI. | Weight ±5% per Wilier, size not stated. Code E555ITI. | Code E655IT2; a power-meter version (E655IM2) costs €18,800. | Frame, fork, Supersonica basebar with Profile Design 43 ASC Pro extensions, headset, integrated seat mast and axles (code E555). At launch in 2024 the frame kit was €9,000. |
| Drivetrain | ||||
| Groupset | Shimano Dura-Ace Di2 R9200 | Shimano Dura-Ace Di2 R9200 | Shimano Dura-Ace Di2 R9200 | — |
| Launched | 2021 · current generation | 2021 · current generation | 2021 · current generation | — |
| Speeds | 12-speed | 12-speed | 12-speed | — |
| Electronic | Yes | Yes | Yes | — |
| Drivetrain | 2x | 2x | 2x | — |
| Shifters | Shimano Dura-Ace ST-R9180 Di2 | Shimano Dura-Ace ST-R9180 Di2 | Shimano Dura-Ace ST-R9180 Di2 | — |
| Crankset | Shimano Dura-Ace R9200-P (power meter) | Shimano Dura-Ace R9200 | Shimano Dura-Ace R9200 | — |
| Chainrings | 54/40 | 54/40 | 54/40 | — |
| Power meter | Shimano Dura-Ace FC-R9200-P | — | — | — |
| Launched | 2021 · current generation | — | — | — |
| Type | Crank-based | — | — | — |
| Measurement | Dual-sided | — | — | — |
| Bottom bracket | Miche / CeramicSpeed Integrale RD | Miche / CeramicSpeed Integrale RD | Miche / CeramicSpeed Integrale RD | — |
| Standard | Press-fit 86.5x41 | Press-fit 86.5x41 | Press-fit 86.5x41 | — |
| Front derailleur | Shimano Dura-Ace Di2 R9250 | Shimano Dura-Ace Di2 R9250 | Shimano Dura-Ace Di2 R9250 | — |
| Rear derailleur | Shimano Dura-Ace Di2 R9250 | Shimano Dura-Ace Di2 R9250 | Shimano Dura-Ace Di2 R9250 | — |
| Cassette | Shimano Dura-Ace R9200 | Shimano Dura-Ace R9200 | Shimano Dura-Ace R9200 | — |
| Range | 11-30 | 11-30 | 11-30 | — |
| Speeds | 12-speed | 12-speed | 12-speed | — |
| Chain | Shimano CN-M9100 | Shimano CN-M9100 | Shimano CN-M9100 | — |
| Brakes | ||||
| Brake calipers | Shimano Dura-Ace BR-R9270 | Shimano Dura-Ace BR-R9270 | Shimano Dura-Ace BR-R9270 | — |
| Type | Hydraulic disc | Hydraulic disc | Hydraulic disc | — |
| Rotors | Shimano Dura-Ace RT900 | Shimano Dura-Ace RT900 | Shimano Dura-Ace RT900 | — |
| Front rotor | 140 mm | 140 mm | 140 mm | — |
| Rear rotor | 140 mm | 140 mm | 140 mm | — |
| Wheels & tires | ||||
| Wheelset | Miche Kleos RD SPX3 (front) / Kleos RD Crono lenticular (rear) | Miche Kleos RD SPX3 (front) / Kleos RD Crono lenticular (rear) | Miche Kleos 67 (front) / Kleos 85 (rear) | — |
| Front rim depth | — | — | 67 mm | — |
| Rear rim depth | — | — | 85 mm | — |
| Rear disc wheel | Yes | Yes | — | — |
| Material | Carbon | Carbon | Carbon | — |
| Tires | Vittoria Corsa Graphene 2.0 TLR | Vittoria Corsa Graphene 2.0 TLR | Vittoria Corsa Graphene 2.0 TLR | — |
| Tire width | 25 mm | 25 mm | 25 mm | — |
| Cockpit | ||||
| Basebar | Wilier Supersonica bar | Wilier Supersonica bar | Wilier Supersonica bar | Wilier Supersonica bar |
| Extensions | Profile Design ASC Pro | Profile Design ASC Pro | Profile Design 52ASC | Profile Design 43 ASC Pro |
| Headset | FSA MR155 bearings | FSA MR155 bearings | FSA MR155 bearings | FSA MR155 bearings |
| Saddle & seatpost | ||||
| Saddle | Prologo Nago R4 PAS Carbon | Prologo Nago R4 PAS Carbon | Prologo Nago R4 PAS Carbon | — |
| Saddle width | 137 mm | 137 mm | 137 mm | — |
| Rails | Carbon | Carbon | Carbon | — |
| Seatpost | Wilier Integrated seat mast (cut to length) | Wilier Integrated seat mast (cut to length) | Wilier Integrated seat mast (cut to length) | Wilier Integrated seat mast (cut to length) |
Supersonica SLR price & value
Building up the Supersonica SLR frameset kit
Included: Basebar, Extensions, Headset, Seatpost.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Saddle, Pedals.
Ownership checklist
0 of 1 known checks pass, 6 not published by Wilier Triestina. Why these checks
- ✕
Threaded bottom bracket
Press-fit 86.5x41
- ?
UDH derailleur hanger
- ?
Standard 12×142 mm rear axle
- ?
Works with mechanical shifting
- ?
Fits third-party aerobars
Supersonica basebar with Profile Design ASC Pro extensions, or custom extensions
- ?
Rear disc wheel compatible
- ?
Fit kept when packed
Raced by
Pros who raced the Supersonica SLR, with results on it.
© Albinfo / CC BY-SA 4.0 Stefan Küng2024–2025Switzerland
- 1st (his first win on the Supersonica)Swiss national time trial championship, Aire-la-Ville 2024
- 1stVuelta a España, stage 21 individual time trial (Madrid) 2024
Setup: Size L/XL; Miche Kleos RD Crono lenticular rear wheel and custom-made extensions
Race setup, 2 parts →Source
Supersonica SLR geometry
| XS/S | M | L/XL | |
|---|---|---|---|
| Stack | 470 mm18.5″ | 495 mm19.5″ | 520 mm20.5″ |
| Reach | 397 mm15.6″ | 418 mm16.5″ | 439 mm17.3″ |
| Seat angle min | 82° | 82° | 82° |
| Seat angle max | 82° | 82° | 82° |
| Head tube angle | 72° | 72° | 72° |
| Head tube length | 48 mm1.9″ | 74 mm2.9″ | 100 mm3.9″ |
| Effective top tube | 463 mm18.2″ | 488 mm19.2″ | 512 mm20.2″ |
| Seat tube length | 513 mm20.2″ | 527 mm20.7″ | 546 mm21.5″ |
| Chainstay | 405 mm15.9″ | 405 mm15.9″ | 405 mm15.9″ |
| Wheelbase | 972 mm38.3″ | 1,001 mm39.4″ | 1,030 mm40.6″ |
| Wheel size | 700c | 700c | 700c |
Side view & pad range
Drawn to scale (how to read it).
How the geometry rides
The Supersonica SLR in size M against the middle size of 16 other bikes: tendencies from geometry, not a ride review (how to read this).
- Wheelbase1,001 mm39.4″
shortestlonger than 63% of 16 bikeslongest
- Chainstay405 mm15.9″
shortestlonger than 30% of 20 bikeslongest
Good to know
Design
The design moves away from the truncated Kammtail tube profiles of Wilier's earlier TT bikes.
SourceDesign
After the first road test, Küng reported flex in the seat tube and head tube. Wilier fixed this with revised carbon layups in the existing moulds.
SourceAerodynamics
Wilier's target was a 10% aero gain over its existing TT bikes. In its wind-tunnel comparison with the Turbine SLR at 50 km/h, the Supersonica is almost 16% more efficient.
SourceFit
Wilier offers custom extensions made from an optical scan of the rider's forearms, in 3D-printed titanium or laminated carbon.
SourceCompatibility
The fork and rear triangle take tyres up to 28 mm, and the integrated seat mast still allows saddle-height adjustment.
SourceRacing
Küng won the closing time trial of the 2024 Vuelta a España on a prototype, and the bike was officially presented at the Paris-Nice team time trial in March 2025.
SourceHistory
Groupama-FDJ signed with Wilier in August 2023 and Wilier started the project straight away. Küng rode a first prototype in early 2024, asked for changes, and approved the second prototype.
SourceHistory
Küng first raced it in the Tour de Suisse opening time trial in June 2024. At first only his L/XL size was made; XS/S and M followed in early 2025, so the team's other riders stayed on the Turbine until then.
Source
Supersonica SLR FAQ
Is the Wilier Triestina Supersonica SLR UCI legal?+
Yes. The Wilier Triestina Supersonica SLR is UCI legal, so it can be raced in draft-illegal triathlon as well as UCI time trials.
How much does the Wilier Triestina Supersonica SLR cost?+
Manufacturer prices (MSRP): €10,000–€22,800 across 4 listed builds and framesets: Supersonica SLR Dura-Ace Di2 + power meter (Kleos RD SPX3 / Crono lenticular), Supersonica SLR Dura-Ace Di2 (Kleos RD SPX3 / Crono lenticular), Supersonica SLR Dura-Ace Di2 Triathlon (Kleos 67/85) and Supersonica SLR frameset kit.
How much does the Wilier Triestina Supersonica SLR weigh?+
The lightest complete build listed (Supersonica SLR Dura-Ace Di2 (Kleos RD SPX3 / Crono lenticular)) weighs 9.4 kg (20.7 lb). The frame weighs 1,450 g (3.2 lb) (Wilier figures, ±5%).
What sizes does the Wilier Triestina Supersonica SLR come in?+
3 sizes: XS/S, M and L/XL.
What seat angle does the Wilier Triestina Supersonica SLR have?+
82° effective seat tube angle.
Does the Wilier Triestina Supersonica SLR have integrated hydration?+
The Wilier Triestina Supersonica SLR has no integrated hydration system.
Does the Wilier Triestina Supersonica SLR have integrated storage?+
No integrated frame storage.
What is the tire clearance of the Wilier Triestina Supersonica SLR?+
Up to 28 mm tires on 700c wheels.
Which groupsets are compatible with the Wilier Triestina Supersonica SLR?+
Drivetrain compatibility: Electronic groupsets (sold with Shimano Dura-Ace Di2). Bottom bracket: Press-fit 86.5x41.
What builds of the Wilier Triestina Supersonica SLR are available?+
Supersonica SLR Dura-Ace Di2 + power meter (Kleos RD SPX3 / Crono lenticular): Shimano Dura-Ace Di2 R9200; Supersonica SLR Dura-Ace Di2 (Kleos RD SPX3 / Crono lenticular): Shimano Dura-Ace Di2 R9200; Supersonica SLR Dura-Ace Di2 Triathlon (Kleos 67/85): Shimano Dura-Ace Di2 R9200.
Which pros ride the Wilier Triestina Supersonica SLR?+
Stefan Küng raced this generation of the Wilier Triestina Supersonica SLR. See the "Raced by" section for seasons and results.
Is the Wilier Triestina Supersonica SLR aerodynamic?+
Almost 16% more aerodynamically efficient than the Turbine SLR (Wilier wind-tunnel comparison at 50 km/h, 0.3% turbulence) (Two prototypes, more than 50 hours of CFD and about 30 hours split between the Silverstone wind tunnel, a Swiss velodrome and road tests in Belgium)
Sources
- https://www.wilier.com/en/bikes/time-trial-triathlon/supersonica-slr
- https://en.bici.pro/tecnica/zoom/wilier-supersonica-debutto-oggi-kung-tour-suisse/
- https://escapecollective.com/exclusive-behind-the-scenes-of-wiliers-race-to-create-the-new-supersonica-slr/
- https://en.brujulabike.com/a-tribute-to-speed-worth-over-30000-eur-thats-stefan-kungs-wilier-supersonica-slr/
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
Wilier Triestina Supersonica SLR data last updated · How the data is checked ·