{"product_id":"rcb-gk4-folding-portable-city-bike-no-electric","title":"RCB GK4 Folding Portable City Bike (No electric)","description":"\u003ch4\u003eRCB GK4 Lightweight 20-Inch Folding City Bike\u003c\/h4\u003e\n\u003cp\u003eThe RCB GK4 is a lightweight 20-inch folding city bike designed for urban commuting, short-distance travel, public transport connections and weekend leisure rides.\u003c\/p\u003e\n\u003cp\u003eWeighing only 12.8 kg, it can be folded quickly for convenient storage in a car boot, apartment, office or other limited space. With an adjustable handlebar and seat, a 7-speed drivetrain, dual disc brakes and durable pneumatic tyres, the GK4 provides a practical and comfortable riding experience for teenagers and adults.\u003c\/p\u003e\n\u003ch4\u003eWhy Choose the RCB GK4?\u003c\/h4\u003e\n\u003cp\u003eLightweight 12.8 kg aluminium folding bike\u003c\/p\u003e\n\u003cp\u003eCompact folded size for transport and storage\u003c\/p\u003e\n\u003cp\u003eSuitable for riders approximately 140–190 cm tall\u003c\/p\u003e\n\u003cp\u003eSmooth and versatile 7-speed gear system\u003c\/p\u003e\n\u003cp\u003eFront and rear mechanical disc brakes\u003c\/p\u003e\n\u003cp\u003eDurable 20-inch pneumatic tyres\u003c\/p\u003e\n\u003cp\u003eMaximum recommended load of 100 kg\u003c\/p\u003e\n\u003cp\u003eBike lock, tyre pump and tool kit included\u003c\/p\u003e\n\u003ch4\u003eLightweight and Compact Folding Design\u003c\/h4\u003e\n\u003cp\u003eAt only 12.8 kg net weight, the RCB GK4 is easy to carry, lift and transport. Its quick-folding frame reduces the bike to a compact size of approximately 840 × 350 × 625 mm, making it suitable for:\u003c\/p\u003e\n\u003cp\u003eCar boots\u003c\/p\u003e\n\u003cp\u003eApartments and small storage spaces\u003c\/p\u003e\n\u003cp\u003eOffices and workplaces\u003c\/p\u003e\n\u003cp\u003eMotorhomes and holiday travel\u003c\/p\u003e\n\u003cp\u003eTrain and public transport journeys\u003c\/p\u003e\n\u003cp\u003eWhen unfolded, the bike measures approximately 1490 × 570 × 1080 mm, providing a stable riding position while remaining compact enough for busy urban environments.\u003c\/p\u003e\n\u003cp\u003eWhether you need a bike for the last part of your daily commute or a portable bicycle for weekend trips, the GK4 fits easily into an active city lifestyle.\u003c\/p\u003e\n\u003ch4\u003eAdjustable for Teenagers and Adults\u003c\/h4\u003e\n\u003cp\u003eThe RCB GK4 can be adjusted to accommodate different rider heights and preferred riding positions.\u003c\/p\u003e\n\u003cp\u003eThe telescopic handlebar adjusts from approximately 960 mm to 1105 mm, while the seat height can be adjusted from approximately 660 mm to 915 mm.\u003c\/p\u003e\n\u003cp\u003eThis flexible design makes the bike suitable for riders approximately 140–190 cm tall and for users aged 12 years and above, subject to individual riding ability and local regulations.\u003c\/p\u003e\n\u003cp\u003eThe adjustable riding position helps improve comfort, control and pedalling efficiency during everyday journeys.\u003c\/p\u003e\n\u003ch4\u003eSmooth 7-Speed Gear System\u003c\/h4\u003e\n\u003cp\u003eThe GK4 features a reliable 7-speed drivetrain, allowing riders to select the appropriate gear for different riding conditions.\u003c\/p\u003e\n\u003cp\u003eLower gears provide easier pedalling when starting or riding on gentle inclines, while higher gears are suitable for maintaining speed on flat roads. The gear system makes the bike practical for:\u003c\/p\u003e\n\u003cp\u003eDaily commuting\u003c\/p\u003e\n\u003cp\u003eCity streets\u003c\/p\u003e\n\u003cp\u003eCycle paths\u003c\/p\u003e\n\u003cp\u003ePark routes\u003c\/p\u003e\n\u003cp\u003eGentle slopes\u003c\/p\u003e\n\u003cp\u003eShort leisure rides\u003c\/p\u003e\n\u003cp\u003eSmooth gear changes help create a more comfortable and efficient riding experience without making the bike complicated to operate.\u003c\/p\u003e\n\u003ch4\u003e20-Inch Pneumatic Tyres with Aluminium Rims\u003c\/h4\u003e\n\u003cp\u003eThe 20-inch wear-resistant pneumatic tyres provide reliable grip and cushioning on everyday urban surfaces.\u003c\/p\u003e\n\u003cp\u003eCombined with lightweight aluminium alloy rims, the tyres help maintain stable handling on paved roads, cycle lanes and slightly uneven surfaces. Their compact size also supports the bike’s portable folding design without sacrificing everyday riding comfort.\u003c\/p\u003e\n\u003cp\u003eThe pedals sit approximately 120 mm above the ground at their lowest point, helping riders maintain suitable ground clearance when passing over common road irregularities.\u003c\/p\u003e\n\u003ch4\u003eDual Disc Brakes for Reliable Control\u003c\/h4\u003e\n\u003cp\u003eFor dependable braking performance, the RCB GK4 is equipped with front and rear mechanical disc brakes.\u003c\/p\u003e\n\u003cp\u003eThe two-brake system provides controlled stopping power during daily commuting and leisure riding. Front and rear reflectors also help improve visibility in low-light conditions.\u003c\/p\u003e\n\u003cp\u003eFor riding on public roads, users should always check that the bicycle is equipped according to the traffic and lighting regulations of their country or region.\u003c\/p\u003e\n\u003ch4\u003eDurable Aluminium Alloy Frame\u003c\/h4\u003e\n\u003cp\u003eThe folding frame is manufactured from welded and painted aluminium alloy, combining low weight with the strength required for regular use.\u003c\/p\u003e\n\u003cp\u003eThe bike supports a maximum recommended load of 100 kg, including the rider and any safely secured light luggage.\u003c\/p\u003e\n\u003cp\u003eIts neutral grey and purple finish gives the GK4 a clean and versatile appearance suitable for commuting, travel and everyday recreational use.\u003c\/p\u003e\n\u003ch4\u003eProduct Compliance and Documentation\u003c\/h4\u003e\n\u003cp\u003eProduct documentation supplied for the RCB GK4 references the following regulations, directives and testing standards, where applicable:\u003c\/p\u003e\n\u003cp\u003eRegulation (EU) 2023\/988 on General Product Safety\u003c\/p\u003e\n\u003cp\u003eEU RoHS Directive\u003c\/p\u003e\n\u003cp\u003eCE-related product documentation\u003c\/p\u003e\n\u003cp\u003eDirective 2006\/42\/EC documentation\u003c\/p\u003e\n\u003cp\u003eEN 14764 test documentation\u003c\/p\u003e\n\u003cp\u003eEquipment intended to support applicable German StVZO requirements\u003c\/p\u003e\n\u003cp\u003eFor advance access to available electronic compliance documents, declarations or test reports, please contact:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"mailto:contact@rcb-scooter.com\"\u003econtact@rcb-scooter.com\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe availability and applicability of individual certificates or standards should be confirmed against the documents supplied for the specific product batch.\u003c\/p\u003e\n\u003cp\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!----\u003e\u003c\/p\u003e","brand":"RCB-UK","offers":[{"title":"purple","offer_id":57834038362456,"sku":"RCB-GK4-purple","price":332.49,"currency_code":"GBP","in_stock":true},{"title":"silver","offer_id":57834038395224,"sku":"RCB-GK4-silver","price":332.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/6562\/1592\/files\/GK4.7131_ce4a2d0d-194b-4790-8968-35daf85b7d38.png?v=1785483576","url":"https:\/\/uk.rcb-scooter.com\/products\/rcb-gk4-folding-portable-city-bike-no-electric","provider":"RCB-UK","version":"1.0","type":"link"}