BH Bikes RS1 4.5

The "RS1 4.5" model from BH Bikes, released in 2021, is a high-quality road bike which, at a price of 4,699 EUR, is positioned in the upper mid-range. It is characterised by its lightweight and robust RS1 Disc ACR monocoque frame, which has a maximum load capacity of 140 kg and weighs just 8 kg.

The RS1 4.5’s braking system consists of Shimano Ultegra hydraulic disc brakes, which ensure reliable braking performance and safety. The brake levers are also from the Shimano Ultegra range, guaranteeing consistent operation and high quality.

Gear changes are handled by the Shimano Ultegra DI2 system, which is electronically controlled and enables precise gear changes. The shift levers are the Shimano Ultegra DI2 Hydra, offering fast and effortless gear changes. The front derailleur is also part of the Shimano Ultegra DI2 system and supports the bike’s total of 22 gears. The crankset is a Rotor Vegast with a 52/36 tooth configuration, whilst the cassette is a Shimano Ultegra 11/30. The drivetrain is completed by an FSA TH-CN1102 chain.

The RS1 4.5’s cockpit consists of an EVO Monocoque ACR handlebar and stem, which ensure an aerodynamic and ergonomic riding position. The headset is an FSA ACR, which enables smooth steering. The wheels feature Vision Team35 rims fitted with Hutchinson Nitro2 tyres in size 700x28, providing a good balance between speed and comfort.

The saddle is a Prologo Nago RS, which, together with the RS1 Aero seatpost and the integrated RS1 seat clamp, ensures a comfortable riding position. Other key frame dimensions include a reach of 370 mm, a stack of 526 mm and a seat tube length of 460 mm, which together provide a well-balanced geometry.

Overall, the 2021 BH Bikes RS1 4.5 model offers an impressive combination of lightness, stability and advanced technology, making it suitable for both ambitious amateur cyclists and professionals.