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The “Cairon S 4.0 Diamant” model from Conway, launched in 2024, is a well-designed e-bike that, at a price of 3,999 EUR, is positioned in the upper mid-range. The frame is a CONWAY Intube Bosch made of aluminium with a diamond shape and a seat tube length of 41 cm, providing a solid foundation for a comfortable and stable ride. With a maximum permissible weight of 130 kg and a kerb weight of 24 kg, the bike is suitable for a wide range of uses.
The braking system consists of TEKTRO “T-390” components, fitted with 180 mm brake discs at both the front and rear, ensuring reliable braking performance. The gear system is a 12-speed SRAM “SX”, operated via an “SX Eagle Trigger” shifter with a single-click function, enabling precise and rapid gear changes. The fork, an RST “Blade Air TNL” with 120 mm of travel, helps absorb shocks on uneven terrain.
Power is provided by a 4th-generation BOSCH “Performance CX” mid-drive motor with an output of 250 watts. The motor is powered by a BOSCH “Powertube 750” battery with a capacity of 750 Wh, which promises sufficient range for long rides. The BOSCH “Kiox 300” display offers intuitive operation with four assistance levels and a push-assist function.
The bike is fitted with a MIRANDA “Classic Gen4” crankset and an SRAM “Gen4 Eagle DM B” cassette, offering a gear ratio of 36 teeth at the front and 11–50 teeth at the rear. The wheels feature RODI “Ready 30” rims and are fitted with SCHWALBE “Tough Tom” tyres in size 60-622, ensuring good traction and stability on a variety of surfaces.
The handlebars are CONWAY “Riser” with a diameter of 31.8 mm and a width of 720 mm, complemented by CONWAY “Sport” grips for comfort. The seatpost is a CONWAY Patent with a diameter of 31.6 mm and a length of 350 mm, supporting the SELLE ROYAL “Vivo Athletic Ergo” saddle, which ensures ergonomic seating comfort.
In summary, the Cairon S 4.0 Diamant is a high-performance e-bike that impresses with its high-quality components and modern design, and is suitable for both everyday use and longer rides.
| Front brakes | TEKTRO "T-390" |
| Brakes | TEKTRO "T-390" |
| Front brake disc | TEKTRO "TR180-17 2.3"", 180 mm |
| Rear brake disc | TEKTRO "TR180-17 2.3"", 180 mm |
| Brake levers | TEKTRO "T-390" |
| Frame | CONWAY Intube Bosch, Aluminium Diamond 41 cm |
| Drivetrain | 12-speed SRAM "SX" |
| Shift levers | SRAM "SX Eagle Trigger", single-click |
| Number of gears | 12 |
| Fork | RST "Blade Air TNL", 120 mm |
| Fork travel (mm) | 120 |
| Bottom bracket | BOSCH |
| Crankset | MIRANDA "Classic Gen4", 165 mm |
| Sprocket | SRAM "Gen4 Eagle DM B", 36 t., with SRAM "PG 1210 Eagle" cassette, 11–50 t. |
| Drive | SRAM "SX Eagle" |
| Headset | ZS56 / ZS56, Blocklock |
| Handlebar | CONWAY "Riser", Ø 31.8, 720 mm |
| Grips | CONWAY "Sport" |
| Stem | CONWAY, 31.8 mm, 75 mm |
| Saddle | SELLE ROYAL "Vivo Athletic Ergo", He |
| Seatpost | CONWAY Patent, 31.6 mm, 350 mm |
| Rims | RODI "Ready 30" |
| Tires | SCHWALBE "Tough Tom", 60-622 |
| Front tire | SCHWALBE "Tough Tom", 60-622 |
| Rear tire | SCHWALBE "Tough Tom", 60-622 |
| Front hub | FORMULA "DC 511", 15 x 110 mm |
| Rear hub | FORMULA "eHL-148 S", 12 x 148 mm |
| Spokes | Niro |
| Pedals | VP "VPE-506" |
| Motor manufacturer / model | BOSCH Gen. 4 "Performance CX" mid-drive motor, 36 V, 250 W |
| Display | BOSCH, "Kiox 300", 4-speed, remote control, push assist |
| Battery | BOSCH "Powertube 750", lithium-ion with BMS, 750 Wh |
| Battery capacity (Wh) | 750 |
| Charger | Bosch 4 Ah |