Impulso PRO GRX 820 disc

When the riding is smooth, speed comes down to resistance and weight, and that's what this rating emphasizes. In real riding, it tends to feel slower when you try to hold a high tempo. The strongest influences are wider mixed-surface tires that add some drag, aerodynamics that help it hold speed once you're rolling, and a solid drivetrain that supports efficient riding.

On steep roads, it comes in at 4.6/10. Within Road bikes, it ranks around the middle. When it gets steep, the gearing feels very easy. The easiest gear works out to about 23.2 gear inches. On the ‘easier low gear’ scale, it sits around ~92% versus similar bikes. We use “gear inches” as a shortcut for climbing gearing. Lower numbers mean you can spin more easily when it gets steep. This kind of low gear helps you stay smooth on long or steep climbs. Different builds can shift the feel a bit, and some manufacturer specs aren’t always publicly listed, so consider this a helpful direction.

On the endurance side of things, sitting at 6.1/10 for aero, it’s an all-round aero level without demanding big compromises elsewhere. What that means on the road is: it’s a balanced middle ground: some streamlining, but not an extreme aero setup. The endurance tag is a useful clue for how wind efficiency ranks among the priorities. That tyre width leans toward grip and stability first, with a small aero penalty at speed. A tidier cockpit and cable routing can help a little once you’re riding quickly. Different brands share different amounts of detail, so this uses the most consistent cues that are available. That typically means solid everyday speed without forcing an aggressive position or race-only parts.

Balanced fit - a middle ground between comfort and speed. It feels this way because you get a large drop: roughly 103 mm from saddle to bar, plus about 555 mm of stretch forward (long). Expect a lean angle around 40 degrees. Front-end spacers are estimated around 19 mm.

Here is the simple reasoning behind the fit flexibility rating: Separate bar and stem components keep fit changes practical, A headset-integrated routing system reduces practical flexibility for cockpit changes. At the same time, Aero or proprietary posts often restrict how easily you can change fit parts. So it lands in Moderately Adjustable.

Comfort comes out to 6.4/10, which usually translates to a easygoing over rough patches ride. That’s why it’s labeled Balanced. It’s running about 40 mm tires on 700c wheels, and extra tire volume helps mute vibration and small bumps on chipseal and broken pavement. The posture is neutral (posture 6/10, torso ~40°), which keeps things neutral and easy to live with.

Overall, this looks like solid value for the build. 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 estimate, the price is close to what we’d expect for a comparable build. In its peer group, it tends to be better-priced than many, beating about 68% of listings. Quick reference: €4.409 listed versus about €4.410 for a comparable build. Some manufacturer details aren’t fully published, so use this as a helpful direction rather than a final verdict. Overall, it looks like a strong buy in its category.

This is a road bike that stays comfortable when the pavement gets rough. Tire size details aren’t available here, so the label follows the overall setup and category cues. Overall, the setup matches this surface range well.