Borrow One First: fLotte's Free Cargo Bikes, and What Berlin's Law (and BVG) Actually Allow

Borrow One First, No Purchase Required

Most newcomers pricing out a cargo bike start with the sticker price. In Berlin, it’s worth starting somewhere else first: a genuinely free way to try the real thing before spending anything at all.

fLotte Berlin, a lending network run by ADFC Berlin (the Berlin chapter of Germany’s national cycling advocacy group), lends out cargo bikes at no cost whatsoever, donations welcomed but never required. Register at flotte-berlin.de, book an available bike for one to three consecutive days through the site’s own calendar, and show up at pickup with a photo ID, proof of your registered address (a Meldebescheinigung), and your booking confirmation code. On the day this page was checked, the platform listed roughly 55 to 60 cargo bikes bookable that same day, spread across all twelve of Berlin’s boroughs and reaching into Brandenburg towns like Potsdam, Hohen Neuendorf, and Falkensee. The fleet includes bikes listed specifically as built for baby and toddler transport, not just general hauling models retrofitted for a child.

Compared to a metered bike-share program or a two-bike advocacy fleet, fLotte’s structure leans harder on the district-by-district model typical of ADFC chapters: pickup points are spread thin across the whole city and into the surrounding Land rather than concentrated at a couple of fixed stations. The Meldebescheinigung requirement at pickup is a distinctly Berlin bit of bureaucracy, too, a reminder that proving your registered address comes up in more corners of daily life here than a newcomer might expect.

Trailer or Cargo Bike: Two Different Legal Ceilings

Once you’re ready to stop borrowing and buy, fLotte’s own rules and any rental program’s fine print stop mattering. What’s actually allowed comes from § 21 StVO, Germany’s federal road traffic regulation, and it splits cleanly into two vehicles with two different rule sets.

A bike trailer (Fahrradanhänger) built for children can carry up to two who haven’t yet turned 7, each accompanied by a rider who is at least 16. The weight side of the rule comes from the DIN EN 15918 safety standard: every child in a certified trailer has to weigh under 22 kilograms, and the trailer’s total permitted weight, including whatever cargo rides alongside the children, tops out at 60 kilograms. A trailer that actually meets the standard needs an enclosed compartment keeping small feet clear of the wheel spokes, plus a secure harness, ideally a padded 5-point belt bolted directly to the frame rather than stitched only into the seat fabric.

A cargo bike (Lastenrad) built and equipped specifically to carry passengers runs under a newer, considerably looser rule. Germany’s StVO reform of April 2020 added language to § 21 Abs. 3 covering bicycles constructed and fitted out for carrying people, with rickshaws and purpose-built cargo bikes as the clearest real-world cases. The practical result: there’s no upper age limit at all on the children (or adults) a genuine passenger cargo bike can carry, only the requirement that whoever is riding it is at least 16. That’s a real, fairly recent legal shift, not a rule that’s always existed. Before 2020, the same under-7 ceiling that still governs trailers applied here too, and the exception only holds if the bike is genuinely designed to carry people, not a general hauling model with a bench bolted on afterward.

Photo by Alexas Fotos on Pexels

Neither vehicle carries a legal helmet requirement, for the child riding in it or the adult pedaling. Germany has no general bicycle helmet law at all, and that holds whether the child is in a mounted seat, a trailer, or a cargo bike’s box. Safety organizations recommend one regardless of which vehicle a child rides in, but nothing in § 21 StVO makes it compulsory, and it’s worth knowing a rental program’s own terms can still expect one even where the law doesn’t.

What BVG and S-Bahn Won’t Carry, Ticket or Not

An ordinary bike rides Berlin’s U-Bahn, S-Bahn, and trams for the price of a Fahrradkarte, a separate ticket bought alongside your own: 2.70 euros for a single ride in zone AB, 3.30 euros for ABC, or 4.60 euros network-wide, current under VBB’s 1 January 2026 tariff. That ticket buys two hours of validity with transfers allowed, though not a round trip, and a full day of unlimited bike carriage starts at 5.90 euros.

None of that applies to a cargo bike or a bike trailer. BVG’s own rider FAQ states plainly that a Fahrradanhänger jeglicher Art, a bike trailer of any kind, is excluded from carriage entirely, aus sicherheitstechnischen Gründen (for safety reasons), and cargo bikes fall under the same exclusion alongside tandems and anything riding on more than two wheels. This isn’t a matter of buying the right ticket or squeezing into the right car: neither vehicle qualifies for carriage at all, on any mode, at any price. A family that owns a Lastenrad or tows a trailer has to plan every single leg of a trip on two (or three) wheels under its own power, with no fallback of loading it onto a train partway through a longer trip the way a family with a standard bike could.

No Subsidy for Families, and Lanes Playing Catch-Up

Berlin has never run a cargo bike purchase subsidy that a private family could actually apply for. According to fahrrad.de’s own subsidy tracker, the state-level program that existed until 2021 covered up to 1,000 euros toward a conventional cargo bike and 2,000 euros toward an electric one, but eligibility was restricted to businesses, the self-employed, and registered nonprofits from the outset, private individuals couldn’t apply even while the program ran. A separate district-level program called LastenradPlus, also commercial-only, ended the same year. fahrrad.de’s own assessment is blunt: Berlin looks unlikely to launch a new program anytime soon. A federal BAFA grant still exists, covering up to 25 percent of a purchase price and capped at 3,500 euros, but it too is restricted to commercial and self-employed buyers, not private households. If your employer offers Dienstrad-Leasing, a bike obtained through salary conversion, that’s the more realistic tax-advantaged route for a family today.

The infrastructure a family would actually ride a cargo bike or trailer on tells a more mixed story than the subsidy picture. ADFC Berlin’s own analysis of the 2024 Fahrradklima-Test, based on roughly 7,500 Berlin respondents and published in June 2025, has the city dropping from 9th to 12th place among Germany’s 15 largest cities, an overall grade of 4.3, a fail by German school-grading standards. 88 percent of respondents said they feel unsafe cycling in Berlin traffic, up from 83 percent two years earlier, and 92 percent reported frequent conflict with motor vehicles. ADFC Berlin’s own conclusion was pointed: current policy reads as a retreat from the city’s former reputation as a cycling model, and the organization is calling for broader protected bike lanes, real enforcement against illegal lane parking, and a resumption of the city’s stalled cycling plan.

The city’s answer on paper is Radschnellverbindungen, a planned 100 kilometers of bike superhighways across ten routes by 2030, with protected bike lanes on main roads (geschützte Radfahrstreifen) as a core piece of the wider network strategy. The catch, in ADFC Berlin’s own words: the first route isn’t expected to begin construction until 2027, and the organization argues Berlin can’t hit its 2027 and 2030 targets with the funding and staffing currently committed. None of this stops a family from riding a cargo bike or trailer today, but it’s worth knowing going in that a painted lane wide enough for a solo cyclist gets genuinely tight once a wide cargo box or a towed trailer joins the picture, and the protected, separated lanes that would make that less stressful are still years from covering most of the network.

Step by Step

1. Test a cargo bike for free before buying anything. Register at flotte-berlin.de, book a slot, and bring an ID plus a Meldebescheinigung to pick one up.
2. Buying a trailer instead? Confirm DIN EN 15918 certification and each child's actual weight. The 22kg per-child and 60kg total limits are real legal constraints, not suggestions.
3. Buying a cargo bike instead? Confirm the specific model is genuinely built and equipped for passengers. That's what the 2020 age-limit exception actually depends on, not just having a box up front.
4. Whichever you choose, the rider must be at least 16. This applies identically to a trailer and a passenger-equipped cargo bike.
5. Don't plan on carrying a cargo bike or trailer on BVG or S-Bahn once you own one. Both are excluded from carriage entirely, regardless of ticket or price.
6. Don't count on a Berlin subsidy for the purchase. Ask your employer about Dienstrad-Leasing instead, and budget extra patience if you're relying on protected bike lanes for the whole route.

Compliance Note

This page explains the general German federal rules (§ 21 StVO) and safety standards (DIN EN 15918) for transporting children by bicycle, along with Berlin-specific lending programs, transit carriage rules, and cycling infrastructure status, current as of mid-2026. It is not legal advice. Rental terms, subsidy availability, and infrastructure timelines can change; confirm current details directly with flotte-berlin.de, BVG, or the manufacturer before relying on this page.