For those seeking a robust vehicle to replace a car, a steel frame cargo motor bike stands out as the optimal choice. While aluminum bikes offer lighter weight, steel frames provide superior ruggedness and durability, especially when weight is not a primary concern. For heavy-duty applications, opting for the sturdiest longtail frame available is highly recommended. The Yuba Mundo has been a popular and reliable option for many users. Detailed build threads online showcase successful modifications and enhancements for such bikes.
To ensure reliability under heavy loads, custom wheel builds are essential. Employing 10 to 12G spokes combined with DH rims featuring bored rim eyelets will create exceptionally strong wheels. Based on experience, utilizing Stan’s rim strips and sealant is highly advisable to prevent punctures. This setup has proven effective even under extreme conditions, maintaining tire inflation despite rim damage.
Traction on the front wheel of a cargo motor bike is generally not a concern. Even with substantial loads, front-wheel traction remains adequate. Utilize your existing front motor, whether direct drive (DD) or geared; both types are suitable if paired with sufficient torque arms and a robust fork. For the rear DD motor, allocate approximately 50% more amperage compared to the front. As the overall weight of the bike increases with cargo, the marginal difference added by a dual DD motor setup becomes negligible, making it a worthwhile upgrade for enhanced power. A dual DD configuration can handle significant loads, even carrying a passenger weighing 100kg without issue.
Employ a strategy of engaging both motors whenever substantial power is needed. Distributing the load across two motors optimizes efficiency and minimizes motor slippage. Disengaging the front motor is primarily necessary only when cruising on flat terrain or when a quieter ride is desired, achieving a degree of stealth, albeit limited due to the bike’s size.
