Arenberg FI Shimano 105 Di2 12 Spd

It aims for an all-round feel more than maximum speed. This road-speed measure focuses on efficient pace on asphalt, where drag and rolling resistance matter most. The main reasons are all-round road tires that balance speed and comfort, an aero-leaning setup that reduces drag at higher speeds, and a solid drivetrain that supports efficient riding.

Uphill performance score: 3.3/10. Within Road bikes, it ranks below average. The low gear is workable, but not super easy on steep ramps. That lowest gear comes out around 27.0 gear inches. In its peer group, it lands around the easier ~58% for low-gear climbing. Gear inches is basically “how easy is the easiest gear”. Lower numbers help you keep your legs spinning on steep bits. 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.

Seen as a race-focused option, sitting at 7.4/10 for aero, with tidier routing up front, it sits in the ‘good enough everywhere’ aero zone without demanding big compromises elsewhere. In everyday language, it’s a balanced middle ground: some streamlining, but not an extreme aero setup. Different categories trade aerodynamics against comfort and stability—race is part of that story. That tyre width is common on performance road builds and tends to suit aero goals. Specs can vary by market and model year, so the summary follows the strongest published signals. In practice, it’s a balanced setup: decent in the wind without demanding big compromises elsewhere.

Balanced fit - a neutral road posture that suits most riders. Mostly geometry-based, with a small category-based estimate.

In Road / Race, Fit adjustability is shaped by a few key choices: A modular front-end gives more freedom to change stem length or bar width; Routing through the headset can make cockpit swaps harder than normal internal routing. That is why we tag it Moderately Adjustable. Put simply, it describes how practical it is to reconfigure your position later.

Ride comfort is 3.0/10 — on a real ride it feels quite direct. That’s the reason it lands as Firm. It’s running about 28 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 7/10), 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. Tires around 28 mm usually mean it’s tuned for smooth-road speed. Overall, the setup matches this surface range well.