Supersonica SLR SHIMANO DURA ACE Di2 R9270

For road riding, the score leans toward outright pace rather than comfort-first priorities. In comparison with more aero-focused bikes, this build is shaped by a fairly average weight, an aero-leaning setup that reduces drag at higher speeds, narrow road tires that keep resistance low, and a high-end drivetrain that tends to feel crisp under load.

Overall on climbs: 4.7/10. Within Road bikes, it ranks around the middle. The lowest gear is very tall when the road tilts up. In numbers, the low gear is roughly 36.0 gear inches. This sits at the tough end — easier than only about ~4% of similar bikes. “Gear inches” sounds nerdy, but it’s just a quick way to describe how easy your lowest gear is to turn uphill. Lower usually means easier. With roughly 9.4 kg to move uphill, you’ll feel it more as climbs get longer. This is happiest on flatter terrain; steep stuff will feel demanding. Build kits can differ by size and spec level, and not every detail is published by every brand, so use this as a practical guideline.

Looking at it as a triathlon setup, sitting at 9.9/10 for aero, on a 26mm tyre setup, it’s designed around going fast in exposed conditions so the faster you ride, the more it shows. Put simply, it’s strongly speed-focused, designed to reduce wind drag when you’re riding fast. A lower front end can help you tuck in a bit, even if the bike itself isn’t built as an aero specialist. This tyre size generally plays nicely with aero goals compared with very wide all-road tyres. A more integrated front end usually reduces minor drag points around the cockpit. If you ride at higher speeds, this is the kind of bike that’s designed to pay you back for that effort.

Race / Pro fit - a low, stretched position built for speed and aerodynamics. This is mainly because the bar sits about 154 mm below the saddle (a very large drop), and you'll be stretched forward about 606 mm in total (very long). Plan for roughly 47 degrees of lean.

This front-end is not locked into a one-piece system, which helps adjustability - Routing is relatively straightforward, which helps when you change cockpit parts. So it lands in Moderately Adjustable. This mainly reflects how easy it is to adjust or swap key fit parts over time.

Ride comfort is 2.1/10 — on a real ride it feels very firm. That’s why it’s labeled Race-Stiff. It’s running about 26 mm tires on 700c wheels, and narrow tires usually mean higher pressure, so more buzz comes through on chipseal and broken pavement. The posture is race-leaning (posture 9/10, torso ~47°), which puts more weight forward, so you notice more feedback through the hands and saddle.

The price looks hard to justify versus similar options. Value is scored 1–10: higher is better value, lower means you’re paying more than similar bikes. Uses MSRP as a baseline; real-world prices can be lower (discounts can change the value). On the spec comparison, it sits roughly 246% above what similar builds typically cost. In its peer group, it’s one of the pricier listings, beating only about 0% of them. Quick reference: €21.527 listed versus about €6.216 for a comparable build. Bottom line: the price looks high for what’s included.

This bike is built for smooth pavement and fast road riding. Tires around 26 mm usually mean it’s tuned for smooth-road speed. Wheel choice (700c) fits the kind of surfaces this bike targets.