Tour de France 2025: Jonas Vingegaard’s unreleased Cervélo S5 has a 1x drivetrain and new, deeper Reserve wheels

Tour de France 2025: Jonas Vingegaard’s unreleased Cervélo S5 has a 1x drivetrain and new, deeper Reserve wheels

Up-close with the Danish ace's new S5

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Simon von Bromley / Our Media


While Cervélo’s new R5 stole the show at the Tour de France Grand Départ, we’ve now had the chance to inspect Jonas Vingegaard’s latest aero bike – an unreleased update to the Cervélo S5.

First spotted on social media in May, this new S5 sticks closely to the silhouette of the existing model.

However, a closer inspection shows several subtle but significant changes.

A fully integrated cockpit

Handlebar on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
The new Cervélo S5 has a fully integrated one-piece cockpit. Simon von Bromley / Our Media

The most notable change is the move to a fully integrated one-piece cockpit, replacing the current Cervélo S5’s distinctive two-piece V-stem and bar. 

Our measurements show Vingegaard will run a narrow 36cm (centre-to-centre at the hoods) bar, paired with a 120mm stem.

Tape mesasure showing narrow bar on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
Vingegaard's handlebar is 36cm centre-to-centre at the hoods. Simon von Bromley / Our Media

This new bar-stem unit features a slimmer central section, which may offer aerodynamic and weight-saving benefits.

The head tube and compensation tube, where the seat and top tubes meet, have been deepened subtly. 

We also think the fork might be slightly deeper and the seatpost very slightly narrower. 

Head tube of Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
The head tube has been deepened, and we suspect the fork has too. Simon von Bromley / Our Media

1x drivetrain and deep wheels

SRAM Red 1x drivetrain on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
The Visma–Lease a Bike rider is using a 1x drivetrain. Simon von Bromley / Our Media

Vingegaard is running a size-51cm frame with a 1x SRAM Red AXS groupset built around a 52T chainring and a 10-36t cassette. A cool teardrop-shaped Wolf Tooth aero chain guide helps keep his waxed chain securely in place.

The bike is equipped with 160mm cranks – that’s not quite as short as the 150mm cranks Vingegaard was seen testing last year, but it’s still at the shorter end of the sizing spectrum.

Reserve front wheel on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
The bike has new, deeper Reserve wheels. Simon von Bromley / Our Media

The Visma–Lease a Bike rider’s S5 was fitted with new, deeper Reserve wheels. These aren’t the carbon-spoked wheels we spotted earlier in the week, but a new 57mm front, 64mm rear combo. That’s a small jump in depth from the 52mm front, 63mm rear setup Vingegaard ran last year. 

These were fitted with 29mm rear and 30mm front Vittoria Corsa Pro Wide tyres.

As built, the bike tipped our scales at 7.385kg – complete with two bottles and the head unit. 

That’s a respectable figure for a proper aero bike and suggests Cervélo has trimmed some fat from the frame or cockpit.

Wolftooth chain catcher on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
There is a Wolf Tooth aero chain catcher. Simon von Bromley / Our Media
Wahoo pedal on Jonas Vingegaard's new Cervélo S5 at the 2025 Tour de France.
Vingegaard has Wahoo Speedplay Aero pedals. Simon von Bromley / Our Media
The front tyre measures just over 30mm. Simon von Bromley / Our Media
All in, the bike weighs 7.385kg. Simon von Bromley / Our Media

Jonas Vingegaard’s Cervélo S5 details 

  • Frameset: Cervélo S5
  • Groupset: SRAM Red AXS
  • Wheelset: Reserve 57/64
  • Power meter: SRAM Red AXS
  • Tyres: Vittoria Corsa Pro Wide, 700x29/30c
  • Handlebar: Cervélo S5 integrated, 120x380mm
  • Seatpost: Cervélo S5
  • Saddle: Prologo Scratch M5
  • Bottle cages: Tacx Ciro
  • Pedals: Wahoo Speedplay Aero
  • Weight: 7.385kg