ROCK MACHINE eRokk B90 City
With a Bosch Performance Line CX motor and 750 Wh battery, this e-bike offers performance, comfort and reliability for everyday city riding. Equipped with quality components like RockShox forks, Shimano gears and practical accessories for a safe and comfortable ride.
Discount
when buying 2 or more e-bikes:
5%
Engine
BOSCH Performance Line CX Smart System
Engine power
85 Nm
Battery capacity
750 Wh
Gearbox
10 speeds
Wheels
27,5"
Shock absorber travel
100 mm (front)
Shimano Cues 1x10
a 10-speed shifting system that allows quick and precise gear changes for a smooth ride. Linkglide technology offers greater durability and longevity than other drives. Ideal for demanding cyclists.
AXA Block XXL
Robust frame bike lock that offers a high level of security thanks to hardened steel and anti-drill protection. It is also ideal for bicycles with wider tyres (e.g. e-bikes and city bikes). With the option to attach an additional chain or cable, you can easily increase security by attaching the bike to a fixed object. The lock has a practical ergonomic design and allows easy operation.
The Rock Machine eRokk B90 City is an electric bike designed for the discerning cyclist looking for reliability and performance for their urban adventures. With a Bosch Performance Line CX motor with 85Nm of torque and a Bosch PowerTube 750Wh battery, it offers a range of up to 150km. The bike is equipped with a Bosch Kiox Smart System display and Bosch LED Remote, making it easy to control and adjust the power while riding.
For a smooth ride on a variety of surfaces, the bike features a RockShox Judy Silver air-sprung fork with 100mm of travel andWTB Groov-E Comp, 27.5×2.4" tires for excellent traction on paved surfaces and agility. High-quality Shimano MT200 brakes ensure safe stopping, even on the toughest trails. In addition, the bike is equipped with 1x10 Shimano Cues, which provide a wide gear range (11-48 teeth) for smooth shifting and optimal performance.
The eRokk B90 City is equipped with practical extras including Alloy Full Cover Fenders, AXA lights, a Delta Carrier for comfortably carrying up to 27kg of cargo and an AXA Block XXL lock for secure parking.
This e-bike is the perfect choice for anyone looking for a powerful and comfortable machine for commuting to work or shopping, and they don't have to worry about hitting the bike path.
Need help choosing the right e-bike? Use our guide to choosing an e-bike or contact us directly.
E-bike range calculator
The e-bike range is approximately
*Factors affecting total range include assist mode settings, technical condition of the e-bike, battery age, ambient temperature, headwind, and riding technique
Bosch Performance Line CX 5th generation engine
The 5th generation motor offers 85 Nm and a peak power of 600 W. Thanks to the magnesium housing, it is lighter (2.8 kg) and quieter. The new mounting system makes installation easier. Improved sensors measure rider inputs more accurately, ensuring a more natural power transfer. The motor has hill-start and walk assist for added comfort. Lower weight improves maneuverability and component durability. Auto mode automatically adjusts terrain assistance. Compatibility with Bosch smart systems allows tracking of ride details, making planning and the ride itself easier.
BOSCH POWER TUBE 750
Original, high-capacity integrated battery BOSCH PowerTube 750. It enables mountain and trekking e-bikes to travel really long distances. Thank to its compact size and minimalist design, the battery is integrated into the e-bike to achieve optimum effect.
- Compatibility only for Bosch Performance Line CX Smart System (BES3) - model year 2022 and newer
- Length: 481.3 mm
- Horizontal and vertical variants - they differ in the way the battery is mounted in the frame.
- The integrated BMS ensures long range and durability.
- It has no memory effect and will not self-discharge.
Display Bosch KIOX 300
The modern and powerful Bosch Kiox 300 display provides advanced features including performance monitoring, navigation and smart device connectivity. It offers a clear display of key information and intuitive controls to enhance the driving experience. The display is designed to withstand scratches and impacts. Bluetooth and ANT+ connectivity. The Smart System is fully networked and always up-to-date thanks to regular wireless software updates. It offers useful support such as push assist or Hill Hold - automatic protection against unwanted reversing.
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The same great passion that led the early enthusiasts to build the first e-bike always leads them forward - to enjoy the joy of creating the best e-bikes and bring them to others. Rock Machine is a lifelong passion and mission of the designers of this company and the same great feelings you'll get from riding their e-bikes. Everyone loves an active lifestyle, so it's no wonder that e-bikes have been involved since 1994.
Parameters
General
| Model year | 2025 |
| Brand | Rock Machine |
| Frame size | Frame L, Frame M |
| Load capacity | 120 kg |
| Colour | Blue |
Motor
| Engine manufacturer | Bosch |
| Engine type | Bosch Performance Line CX Gen. 5 - Smart System |
| Torque | 85 Nm |
| Centre engine | Yes |
Battery
| Charger | Bosch 4A |
| Battery capacity | 700 - 799 Wh |
| Precise capacity | 750 Wh |
Suspension
| Front fork | RockShox Judy Silver TK, Tapered, Lockout / 100 mm |
Components
| Saddle | SELLE ROYAL Essenza Moderate |
| Saddlebag | Odpružená, One1 Alloy, ø 30,9 mm |
| Front hub | Shimano HB-TC500-15-B, 15x110mm |
| Rear hub | SHIMANO FH-QC300-HM, 36H, CL, M10X135mm, QR Type |
| Grips | Herrmans Grips |
| Racks | STARS J30D, Disc, 32H |
| Extender | ONE1 TDS-C342 Alloy, 31.8xE45mm, +3° |
| Handlebars | ONE1 Alloy, šířka 760 mm |
Transmission
| Sorting | Shimano SL-U6000-10R CUES |
| Number of gears | 1×10 |
| Shifter | SHIMANO Cues U6000 |
| Cassette | Shimano CS-LG300 10spd 11-48 |
Brakes
| Front brakes | Shimano MT200, hydraulic, 180 mm |
| Rear brakes | Shimano MT200, hydraulic, 180 mm |
Questions
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