Impulso All Road GRX 400

This road speed rating is tuned for paved riding - think steady fast tempo and easier acceleration. A few practical factors stand out: wider mixed-surface tires that add some drag, aerodynamics that help it hold speed once you're rolling, and a more budget-friendly drivetrain that focuses on value. On typical routes, it tends to feel slower when you try to hold a high tempo.

Climb score: 2.2/10. Within Road bikes, this comes out below average. You may find yourself pushing a bit more on steeper grades. The easiest gear works out to about 31.2 gear inches. On the ‘easier low gear’ scale, it sits around ~30% versus 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. It won’t be the absolute best climber, but it won’t hold you back on most climbs either. 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.

On the endurance side of things, an aero score of 5.8/10 means that it’s an all-round aero level so it feels versatile, not single-purpose. Put simply, 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. The wheels are on the shallower side (around 24mm), so frame shapes and position likely matter more than wheel depth here. These wheels lean more toward stability and versatility than pure aero. That tyre width leans toward grip and stability first, with a small aero penalty at speed. Not every brand publishes the same detail, so this leans on the clearest available specs. That typically means solid everyday speed without forcing an aggressive position or race-only parts.

Comfort fit - comfort-leaning without feeling sluggish. Some measurements were missing, so part of this is estimated.

In Road, So we classify it as Adjustable. Here is the simple reasoning behind the fit flexibility rating: Separate bar and stem components keep fit changes practical, and Less routing complexity makes swaps and adjustments more practical.

Ride comfort is 6.3/10 — on a real ride it feels nicely smooth. That’s why it’s labeled Balanced. It’s running about 40 mm tires, and extra tire volume helps mute vibration and small bumps on chipseal and broken pavement. The posture is neutral (posture 5/10), which balances comfort and responsiveness pretty well.

Compared to similar bikes, this is priced very competitively. 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). Based on the spec estimate, it comes in about 17% under the typical level for similar builds. In its peer group, it tends to be better-priced than many, beating about 82% of listings. To anchor it: price €1.800 versus an estimated €2.158 for a similar build. Put simply: this is strong value for what’s included.

This setup works well when your ride switches between tarmac and easy unpaved sections. The tire size is around 40 mm, which supports mixed routes without feeling slow on road. It’s listed as Endurance, but the setup aligns better with All Road.