Test and review of the Colnago Y1Rs equipped with Shimano Ultegra Di2: extreme aerodynamics, WorldTour performance, weight, and price of the most practical build.
⚡ THE 3-LINE SUMMARY (For those in a rush)
WorldTour DNA: Inherits the entire aerodynamic engineering and research of the pros' breakaway machine, but with a component build focused on real-world practicality.
Shimano Ultegra Di2 Group: Surgical electronic shifting that is 100% reliable, without breaking the bank for the Dura-Ace badge.
Weight & Scale: In the Ultegra build with mid-to-high-profile carbon wheels, the scale settles right around 7.5–7.6 kg, proving to be a remarkably agile aero weapon.
When a legendary brand like Colnago launches an aerodynamic missile like the Y1Rs, all eyes naturally lock onto the flagship WorldTour specs that cost well over €15,000. But the ultimate test to see whether a superbike belongs in a museum or out on amateur race circuits is testing its most balanced configuration: the one paired with the Shimano Ultegra Di2 groupset.
We put the Y1Rs through its paces in this exact setup to see if extreme aero tech gels nicely with a "sensible" build (relatively speaking) or if it loses its magic when stepping off the top step of the podium.
1. Aerodynamics & Frame: The Same Skin as the Pros
The great news for anyone choosing the Ultegra Di2 build is that the frame doesn't change by a single millimeter compared to what the professionals ride. You get the exact same wind tunnel development:
Slashed Frontal Profile: The down tube shaping and the integrated CC.Y1 cockpit (featuring a distinctive gullwing design) slice through the air, cutting aerodynamic drag and banking those crucial watts when driving high speeds on flats or rolling terrain.
Torsional Rigidity: The front triangle and rear stays deliver a lightning-fast response out of the saddle. There is zero power waste: every watt pumped into the pedals translates straight into pure speed.
2. Shimano Ultegra Di2 Group: The Ultimate Sweet Spot
Why choose Ultegra Di2 on a frame of this caliber? Simple: because it delivers 95% of Dura-Ace performance at a significantly friendlier price (and weight).
Flawless Electronic Shifting: Shimano’s semi-wireless shifting precision is the industry benchmark. Hard shifting efforts out of the saddle are crisp, silent, and completely hesitation-free.
Braking & Modulation: The integrated disc brakes offer a sharp bite and excellent modulation, even when roads turn wet or you're charging downhill at full tilt.
Real-World Weight: Built up with Ultegra Di2 and mid-to-high carbon wheelsets, the Y1Rs stops the scale around 7.5–7.6 kg in size M. Highly respectable numbers for a dedicated aero rig that won't drag you down on climbs.
3. On-The-Road Dynamics: Flat-Out Blade, Solid in the Corners
Riding the Y1Rs with Ultegra Di2 delivers pure racing sensations. This isn't a "comfortable" or relaxed Sunday granfondo bike: the riding position is aggressive, weight-forward, and built for mashing big gears.
On flat stretches and rolling hills, it holds momentum with jaw-dropping ease. Through rapid direction changes, the front end responds with millimeter precision, though it demands experienced hands when sudden crosswinds try to buffet that deep aero profile.
Pros, Cons, and the Skeptic's Verdict
The Real Pros (Approved)
Value-to-Performance Ratio (Relative): Accesses the exact same aerodynamics and engineering as the flagship tier without the insane price tag of Dura-Ace.
Flawless Ultegra Electronics: Top-tier mechanical and digital reliability.
Pure Thoroughbred Looks: Tense lines, fully internal cable routing, and a peloton presence that refuses to go unnoticed.
The Cons (What Doesn't Convince)
Still a Hefty Price Tag: Even a step below WorldTour level, the Y1Rs remains an elite luxury item (estimated roughly between €10,500 and €12,000 depending on the wheels).
Aggressive Geometry: Demands good core flexibility and steady training; this is not an endurance machine built for plush long-distance comfort.
Frequently Asked Questions (FAQ)
1. Does the Colnago Y1Rs with Ultegra Di2 lose aero performance compared to Dura-Ace?
Zero. The frame, fork, seatpost, and integrated cockpit are the exact same components used by WorldTour professionals. The weight and component differences lie entirely in the groupset and minor peripherals.
2. How much does the Y1Rs weigh in the Ultegra Di2 build?
With a standard size M setup and appropriate carbon wheels, the weight sits right around 7.5–7.6 kg (without pedals).
3. Is this bike suitable for alpine climbs?
It's born as a flat-out aerodynamic speed machine for sprinters and breakaway specialists, but thanks to its controlled weight (under 7.6 kg) and stellar torsional stiffness, it handles climbs brilliantly—provided you have the legs to push heavy gears.