REACTO 4000

On asphalt, it's mainly a question of resistance and efficiency, and that's what the score summarizes. In day-to-day use, it's one of the more speed-focused builds in its group. It ends up here thanks to narrow road tires that keep resistance low, an aero-leaning setup that reduces drag at higher speeds, and a solid drivetrain that supports efficient riding.

If your rides include hills, it rates 2.8/10 for climbing. Within Road bikes, it sits below average. It has a middle-of-the-road low gear for climbing. Your easiest gear lands around 28.6 gear inches. Compared with similar bikes, this low gear is easier than about ~47% of them. “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. Specs can vary by size and build, and some manufacturer details aren’t always published, so treat this as a strong guide rather than a guarantee.

With a more tucked fit, coming in at 9.3/10 on aero, it’s a speed-first, wind-focused setup with a clear speed-over-everything bias. 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. The wheels are on the shallower side (around 30mm), so frame shapes and position likely matter more than wheel depth here. That wheel depth is more all-round than purely aero-focused. This tyre size generally plays nicely with aero goals compared with very wide all-road tyres. Specs can vary by market and model year, so the summary follows the strongest published signals. If you ride at higher speeds, this is the kind of bike that’s designed to pay you back for that effort.

Sporty fit - more tuck for efficiency, but still manageable for many riders. You get this posture because bars are around 99 mm lower than the saddle, which is a large drop, and the forward stretch measures around 577 mm (long). You'll likely be near 38 degrees of lean.

In Road, Main reasons for the fit flexibility result: The cockpit is modular (separate stem and handlebar), so it is easier to adjust or swap fit parts, A headset-integrated routing system reduces practical flexibility for cockpit changes, The listed seatpost details do not show clear restrictions or extra flexibility signals - System terms found in the spec text include: ACR. So it lands in Moderately Adjustable. In practice, it is about how easy fit changes are with normal parts and service work.

Comfort comes out to 2.1/10, which usually translates to a harsh on rough surfaces ride. That’s why it’s labeled Race-Stiff. It’s running about 25 mm tires on 700c wheels, and you feel more of the road texture with narrow tires on chipseal and broken pavement. The posture is race-leaning (posture 7/10, torso ~38°), which puts more weight forward, so you notice more feedback through the hands and saddle.

This bike is built for smooth pavement and fast road riding. The tire size is around 25 mm, which is typical for fast road setups. Overall, the setup matches this surface range well.