Arenberg Shimano 105 12 Spd

In a road context, the speed rating is about holding pace with less effort once you're up to speed. The score is largely shaped by 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. As a result, it's more about all-round efficiency than maximum pace.

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. The easiest gear works out to about 27.0 gear inches. On the ‘easier low gear’ scale, it sits around ~58% versus similar bikes. 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. 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.

Category-wise (race-focused), that 7.2/10 aero rating suggests that running tyres around 28mm, it’s a practical middle ground and it doesn’t force a specialist aero posture. The short version is: it’s a balanced middle ground: some streamlining, but not an extreme aero setup. This tyre size generally plays nicely with aero goals compared with very wide all-road tyres. In practice, it’s a balanced setup: decent in the wind without demanding big compromises elsewhere.

Balanced fit - a versatile position for long rides and faster efforts. Based on full geometry data.

In Road, Overall, it falls into Adjustable. Main reasons for the fit flexibility result: Because the bar and stem are separate, changing reach or bar shape is usually straightforward. Also, Less routing complexity makes swaps and adjustments more practical.

This scores 3.0/10 for comfort, so it feels firm out on the road. That’s why it’s labeled 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 tends to feel more direct, especially over rougher sections.

This bike is built for smooth pavement and fast road riding. Tires around 28 mm usually mean it’s tuned for smooth-road speed. The wheel setup (700c) supports that direction.