V6 - Forumslader Pro
The Pro V6 is a significant upgrade over previous versions (V3, V4, V5). Key features include:
Assuming you have XENTRY/DAS installed on a VM, here is how to connect the Forumslader Pro V6 for the first time:
When your W220 S-Class sags overnight, you need to cycle the valves manually. With the V6, you can activate the compressor relay, open individual corner valves, and read the live pressure in PSI from the pressure sensor—impossible with a generic code reader.
A traditional power meter (like a Stages, 4iiii, or Favero Assioma) costs $300–$1,000+. The Forumslader Pro V6 typically costs between €150 and €250 ($160–$270 USD), assembled. For budget-conscious randonneurs and tourers, this is a game-changer.
The Forumslader Pro V6 is not for everyone. If you want turn-key simplicity, buy a Garmin. But if you enjoy the intersection of engineering, cycling, and self-reliance, this device is a joy.
It offers something no other computer does: permanent power measurement without ever charging a battery, integrated light management, and a direct connection to the soul of your bike. For the dedicated long-hauler, the V6 is less a tool and more a companion.
Rating: ★★★★☆ (4.5/5)
Deducting half a star only for the installation complexity.
Disclaimer: Forumslader is a community-driven project. Specifications and availability change frequently. Always check the latest threads on forumslader.de before purchasing.
The Forumslader Pro V6 is a high-performance bicycle dynamo charger designed to convert energy from your hub dynamo into stable USB power for smartphones, GPS units, and lights. It is widely regarded by the bikepacking community as one of the most powerful and efficient solutions for long-distance off-grid cycling. Key Features and Performance
Integrated Buffer Battery: Unlike simple chargers, the Pro V6 includes a built-in Li-ion buffer battery. This allows for a continuous, stable 5V output even when you are riding at very low speeds or stopped at a traffic light. forumslader pro v6
Charging Speed: Real-world tests indicate that the Pro V6 can fully recharge a typical smartphone and bike computer in approximately 6 hours of riding time, significantly faster than competitors like the Cycle2Charge or Fahrradlader.
Form Factors: The V6 is available in different versions, including the V6 Ahead, which is designed to be hidden inside the bicycle's steerer tube. This requires a specific minimum length (approx. 290 mm for the larger battery model).
Connectivity: Many models feature Bluetooth connectivity, allowing you to monitor charging status, battery levels, and riding data via a dedicated smartphone app.
Future-Proofing: The manufacturer, a small-scale German operation, frequently updates the circuitry to incorporate the latest battery and USB technology. Comparisons to Other Chargers Forumslader Pro V6 Cycle2Charge Cinq Plug6 Plus Charge Time (Phone + GPS) Buffer Battery Included (Internal) None (Requires external bank) Installation Steerer tube or Frame bag Headset cap Steerer tube Max Power Very High (at 20+ kph)
For more detailed technical specifications and purchase options, you can visit the official Forumslader Website or read comprehensive reviews on CyclingAbout. Are you planning to install this in your steerer tube, or
The Forumslader Pro V6 is widely considered the most powerful bicycle dynamo USB charger available, designed primarily for long-distance cycle tourists and bikepackers. It converts AC power from a hub dynamo into stable DC power to charge devices like smartphones, GPS units, and lights. Key Technical Specifications
The V6 version utilizes advanced circuitry and a massive buffer battery to maintain charging even at low speeds or when stopped.
Power Output: Up to 10W+ at roughly 30 km/h; begins charging at just 5–6 km/h.
Buffer Battery: Features a 32Wh (approx. 28Wh usable) internal battery. The Pro V6 is a significant upgrade over
Charging Capability: Can refill a phone and bike computer in roughly 6 hours of riding time. Outputs: Standard 5V 3A USB output.
Optional 12V output for e-bike lights or other high-voltage accessories. Weight: Approximately 271–274 grams for the Pro version. Unique Features
Bluetooth Connectivity: Connects to a dedicated smartphone app (Android/iOS) to display real-time data such as current charging power, battery percentage, speed, and even barometric altitude.
Smart Charging: Automatically switches between four charging stages to maximize efficiency based on your current speed and dynamo output.
Garmin Integration: Compatible with Garmin devices via the Forumslader Companion app in the Connect IQ Store, allowing you to see battery levels directly on your head unit.
Solar Input: Capable of taking input from a solar panel to charge the buffer battery when you are not riding. Version Variations
While the internal V6 electronics are identical, the form factor changes based on your mounting preference:
Forumslader Pro: Housed in a durable 3D-printed PETG case. It is designed to be strapped to the frame or kept in a bag.
Aheadlader: A more compact version designed to be hidden inside the bike's steerer tube (ahead stem). It uses smaller batteries to fit the narrow space. Usage Tips Disclaimer: Forumslader is a community-driven project
Initial Setup: You must use the app to select your specific dynamo model before the first ride so the charger can optimize its power intake.
Independent Unit: Some users recommend using it as a removable "power bank" unit that can also be charged from a wall outlet when you reach a hotel or cafe.
Ordering: These are small-scale production units often ordered via email directly from the official site.
Are you planning to install this inside the steerer tube or as an external frame-mounted unit? Testbericht: Forumslader V6 - Fahrradbeleuchtung-Info.de
If your Forumslader Pro V6 isn't connecting, check these first:
Problem 1: "No communication with multiplexer"
Problem 2: "Battery voltage too low"
Problem 3: CAN communication error (Beeping from DAS)
