Modular Cargo Bike for Family Use
UM FLEX
One Bike. Every Version of Family Life.
Designed for Families
Customizable
EU Certified Safety
Modular Cargo Bike for Family Use
UM FLEX
One Bike. Every Version of Family Life.
Designed for Families
Customizable
EU Certified Safety
Modular Cargo Bike UM FLEX for Family Use
El UM FLEX is a modular long-john electric cargo bike designed for the way families actually live — carrying children one moment, groceries the next, and fitting into a hallway when the day is done. Front cabin swapped in seconds — pull to release, drop to lock. Built on a lightweight aluminum platform with cable steering, front suspension, and a low step-through frame, FLEX handles like a city bike and carries like a cargo bike. Compact enough to live with every day. Capable enough to replace the car.
Biomechanics & Comfort
Engineered for People, Not Just Performance.
Two decades of adult tricycle expertise, distilled into one thoughtfully engineered machine that keeps riders independent, active, and comfortable — for years to come.
From the universal joint in the steering column to the passivated disc rotors that resist corrosion in all weathers, every component reflects a deliberate engineering decision.
Compact Long-John UM FLEX
OEM-Ready Cargo Bike Platform
Built to support customization at scale — from frame design to component integration.
Adaptive Modular Frame
The FLEX is built on a modular aluminum platform engineered to switch between child passenger, cargo, pet, and camping configurations without changing the frame or purchasing separate accessories. Where most cargo bikes lock you into a single use case, the FLEX treats configuration as a feature — not a limitation.
Quick-Fold Front Cabin
One spring latch. Pull to release. Drop to lock.The FLEX's front cabin can be quickly folded up. With open, it switches between a child seat with 3-point harness and a cargo platform by stowing the seat. When folded, it transforms into a compact, convenient e-bike. Combined with the foldable stem, the FLEX achieves hallway-friendly storage dimensions. A fully capable family cargo bike that doesn’t require a garage.
Compact & Lightweight All-Aluminium Frame
At 2250mm long and constructed entirely from aluminium alloy, the FLEX is among the lightest and most compact long-john cargo bikes in its payload class. Light enough to lift over a kerb without assistance, short enough for standard bike parking, and easy enough to manoeuvre in tight urban spaces that full-size cargo bikes treat as obstacles.
Low Step-Through + One-Touch Kickstand
A minimal step-over height means mounting stays effortless in everyday clothes — no swinging, no balancing act. The one-touch kickstand deploys and retracts hands-free, holding the loaded bike stable during child loading and unloading without requiring the rider to bend down or use both hands. At full passenger weight, this is a daily safety requirement — not a convenience feature.
Cable Steering — Light Touch, Tight Turns
Cable steering — adopted by premium European cargo bike brands for its responsive, car-like feel — gives the FLEX a naturally light handling character that makes tight urban manoeuvres intuitive even when the front cabin is fully loaded. The result is a long-john that genuinely handles like a shorter bike — more agile in bike lanes, easier to park, and more confidence-inspiring for first-time cargo bike riders.
Height Adjustable Stem & Seatpost
A foldable stem with independent height and angle adjustment puts the handlebar exactly where it needs to be — for a shorter rider on the school run or a taller partner doing the weekend shop. The adjustable seatpost completes the fit below. For families sharing one bike across different body types, this level of adjustability removes the compromises that fixed-cockpit cargo bikes ask every rider to accept.
Boost Start Mode
At traffic lights with two children and a week of groceries on board, re-acceleration is where underpowered cargo bikes expose themselves. The FLEX's Boost Start Mode delivers immediate, controlled torque from a standing stop — eliminating the heavy-load hesitation that makes urban riding stressful and erodes rider confidence over time. Smooth from the first pedal stroke, every time.
Front + Rear Dual Load Zones
The FLEX runs a front cargo cabin and a MIK HD rear rack simultaneously — carrying children up front while managing rear cargo at the same time. School bags, groceries, a pet carrier, and two kids in a single run is not an edge case for FLEX users; it is Tuesday morning.
AirTag FindMy
AirTag FindMy integration keeps the FLEX locatable wherever the day takes it — parked outside school, locked at the supermarket, or left at the station. Security that works before the problem starts, without a subscription or dedicated hardware.
USE CASES
Designed for versatility, enabling seamless adaptation across multiple use cases and custom builds.
The UM FLEX is the right platform for brands and distributors sourcing cargo bike wholesale: urban families replacing short car journeys; female riders seeking a genuinely ergonomic and versatile cargo bike; lifestyle markets where modularity across family, pet, and leisure use justifies a premium; and retailers seeking a single SKU that covers multiple customer profiles without a fragmented catalogue.
Contáctanos for modular cargo bike wholesale pricing.
| Dimensiones | 2250L × 700W × 1110H mm |
| Material del marco | 6061 Aluminum |
| Batería | 48V 15Ah，Samsung Battery Cells |
| Motor | Ananda Mid-Drive 48V/250W 120N·m / Hub Motor 48V/250W 55N·m |
| Gearing | Shimano 8-Speed Internal / 7-Speed External |
| Brakes | Hydraulic Disc Brakes, Front & Rear |
| Tyres | 20×2.125″, KENDA Tires with Puncture-Resistant Belt and Reflective Strips |
| Max GVW | 250 kg |
| Passengers | 1 Adult + 2 Children under 3 |
| Steering | Cable / Rod steering |
Related Reading
The 2026 Long John Cargo Bike Blueprint: Engineering for the Modern Family
For urban planners and automotive fleet operators in Europe and North America, the car replacement conversation has long been a...
Long John Cargo Bike: Engineering, Safety, and Real-World Decisions Behind Europe’s Most Versatile Urban Workhorse
Introduction: Why the Long John Cargo Bike Still Matters The long john cargo bike is not a new invention, but...
Excelencia adaptada a sus necesidades
Servicios centrados en el cliente
En United Mobility, priorizamos a nuestros clientes, ofreciendo soluciones personalizadas y un soporte excepcional. Desde la personalización OEM/ODM hasta una garantía confiable y un servicio al cliente eficiente, nos comprometemos a garantizar su éxito en cada paso.
Obtenga una cotización
Cuéntenos su demanda
Nuestro equipo experimentado está listo para brindar soluciones personalizadas para apoyar el crecimiento de su negocio.
Spanish 
English 
German 
Dutch 
Danish 
French 
Polish 
Portuguese