RCB GK4 Folding Portable City Bike (No electric)
Free delivery within Europe, arrives within 3-7 days
European CEEuropean CE certified Bike, legally available in Europe
Enter the discount code at checkout to enjoy RCB Hello 2026! New Year's discounts.
€20
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Use Code: RCB-20
100KGStandard load
Disc brakeBrake type
20InchWear-Resistant Tires
Fold and put inCar trunk and seat
Length scaleTelescopic handlebars
AdjustableRiding Seat
7 speedsSpeed mode
RCB GK4 Folding Portable City Bike: Your Ultimate Urban Commuting Companion
The RCB GK4 folding portable city bike is the ideal lightweight folding bike for urban commuting, short-distance travel, and family adventures. Designed with a classic, versatile grey finish and fully compliant with EU standards, this folding bike combines portability, performance, and safety to redefine your daily ride.
Lightweight & Ultra-Portable Folding Design
At just 12.8KG net weight, the RCB GK4 is one of the lightest folding bikes on the market, making it easy to carry with one hand. Its quick-release folding mechanism lets you fold it down to a compact 840*350*625mm, perfect for storing in car trunks, under desks, or beside public transport seats. When unfolded, it measures 1490*570*1080mm, offering a stable, comfortable ride for city streets and light trails alike. Whether you’re solving the “last mile” of your commute or heading out for a weekend ride, this portable folding bike fits seamlessly into your lifestyle.
Fully Adjustable for All Riders
The RCB GK4 folding bike features a fully adjustable design to suit riders of all sizes. The handlebar height telescopes from 960mm to 1105mm, while the seat height adjusts freely from 660mm to 915mm. This makes it perfect for users between 140cm and 190cm tall, and suitable for anyone aged 12 and above – so the whole family can enjoy cycling together. No more awkward riding positions; this folding bike adapts to you.
Smooth 7-Speed Riding Experience
Equipped with a precision 7-speed smooth-shifting system, the RCB GK4 delivers seamless gear changes for effortless navigation of city streets, gentle slopes, and light trails. Paired with 20-inch wear-resistant, non-slip pneumatic tires and lightweight aluminum alloy rims, this folding bike offers exceptional grip and stability, even on wet or uneven surfaces. Whether you’re cruising to work or exploring the city, the 7-speed system lets you switch speeds with ease, making every ride more efficient and enjoyable.
Durable & Safe for Daily Use
Built with a sturdy welded and painted aluminum alloy frame, the RCB GK4 folding bike is designed to last. It supports a maximum load capacity of 100KG, making it suitable for both riders and light cargo. For safety, it features front and rear dual disc brakes, delivering powerful, consistent stopping power even in wet conditions. Combined with standard front and rear reflectors, visibility is maximized for night riding. The 20-inch pneumatic tires offer excellent traction, and with a minimum pedal height of just 120mm from the ground, you can navigate obstacles smoothly, giving you greater confidence on every ride.
All-Inclusive Accessories for Immediate Use
The RCB GK4 folding portable city bike comes with everything you need to start riding right out of the box: the complete bike, an L-shaped hex key tool kit, a multilingual user manual, a combination bike lock, and a tire pump. No extra purchases required – just unpack, assemble, and go! This all-inclusive package makes it the perfect choice for anyone looking for a hassle-free, reliable folding bike for commuting and leisure.
RCB GK4 complies with or has the following certifications:
CE certification
GPSR (EU) 2023/988
2006/42/EC
EN 14764
StVZO certification(DE）
EU RoHS Directive. For advance access to electronic documents, please contact contact@rcb-scooter.com
Parameter Details
Packaging Size：850*370*630mm
Unfolded Size：1490*570*1080mm
Folded Size：840*350*625mm
Tire Type：Pneumatic tires
Tire Size ：20-inch
Frame Material：Aluminum
Speed：7 gears
Braking Mode：Disc brakes
Maximum Load Capacity：100 kg
Recommended Age：12 years and older
Front Reflector：Included
Rear Reflector：Included
What's In The Package
1 RCB GK4 mountain bike
1 L-shaped hexagonal wrench tool kit
1 multi-language instruction manual
1 combination bike lock
1 tire pump
Warranty and Returns
Up to 24 months warranty and lifetime maintenance service
All accessories can be replaced once within 12 months for free, and free delivery or free return to the factory for repair is provided, without paying postage (battery replacement depends on actual use).
According to time division
1 Return to warehouse for repair
If the fault occurs within 1-12 months, we will give you a return mailing slip to send it back to the repair warehouse for repair, without postage and parts replacement costs.
If the fault occurs more than 12-24 months, we will give you a return mailing slip to send it back to the repair warehouse for repair, and you need to pay for shipping, but you do not need to pay for parts and repair costs.
2 Car replacement service (normal use)
If the fault occurs within 2 months and cannot be repaired. We can directly replace the car. No need to pay for shipping and car cost (0 yuan replacement)
If the fault occurs within 2-6 months and cannot be repaired, you can pay a small amount of shipping to exchange for a new car.
If the fault occurs more than 6-24 months and cannot be repaired, you only need to pay 30%-50% of the car price.
3 Mailing Accessories
We mail accessories to customers, and the accessories will be replaced free of charge within 12 months. No shipping fee is required, and no accessories fee is charged.
We mail accessories to customers, and the accessories will be replaced free of charge within 12-24 months.
Warranty Method
1. We usually choose to replace parts instead of repairs to minimize your waiting time.
2. Parts that meet the warranty conditions described on this page will enjoy a completely free warranty.
3. Parts outside the warranty period can still be repaired/replaced, but a fee is required. For specific fee details, please contact contact@rcb-scooter.com
4. No miscellaneous expenses during the repair period, such as alternative transportation, fuel or carpooling fees, will be charged during the warranty period.
Lifetime Technical Support
1. Our technical experts provide professional help and provide customized solutions for complex problems.
2. One-to-one support: Dedicated support staff will handle all your inquiries, ensuring personalized help throughout the process.
3. This service is available at any time regardless of your warranty status. (Note: After the warranty period, the customer is responsible for the cost of replacing parts.)
RCB GK4 Folding Portable City Bike (No electric)
Sale price€369,99 EUR
Regular price€399,99 EUR
RCB GK4 Size
Size And Fit(Suitable for height:140cm (55.12'')- 190cm(74.8''))
A. Overall length of the bicycle in unfolded state
1490mm(58.66'')
B. Handlebar height adjustment range (vertical distance from the ground to the top of the handlebars)
960mm(37.79'')-1080mm(42.51'')
C. Front wheel diameter
510mm(20'')
D. Wheelbase length
1000mm(39.37'')
E. Minimum pedal height from the ground
120mm(4.72'')
F. Shortest distance from the seat to the bottom bracket
660mm(25.98'')
G. Longest distance from the seat to the bottom bracket
915mm(36.02'')
O. Length of the folding axle in the middle of the frame
560mm(22.05'')
L. Thickness of the folded section of the frame after folding
350mm(13.78'')
N. Overall height of the bicycle in folded state
625mm(24.61'')
M. Overall length of the bicycle in folded state
840mm(33.07'')
H. Handlebar width
570mm(22.44'')
Net weight
12.8KG
Standard load
100KG
Suitable for height(1cm=10mm)
1400mm (55.12'')- 1900mm(74.8'')
