Xtracycle’s Swoop ASM e-bike brings an automatic transmission to cargo bikes
Ars Technica reviewed the Xtracycle Swoop ASM, a $4,500 steel-framed cargo e-bike that uses a Shimano system capable of shifting gears automatically on the rider's behalf. The idea builds on the fact that modern e-bikes already track cadence, torque and speed, giving the electronics enough information to choose an optimal gear without input from the rider, though the reviewer found the automatic shifting itself less smooth than manual changes, even though the system is genuinely effective at deciding when to shift.
The Swoop ASM is a long-tail cargo bike with a "mullet" wheel setup (a larger front tyre and smaller rear one) and front suspension, and it can be ridden with the automatic shifting switched off if preferred. Weighing just under 70lb (31kg), it features a double-telescoping seat post and an adjustable handlebar clamp to accommodate different rider sizes, plus protective covers for the rear wheel and chain, a sturdy kickstand, and a highly customisable rear rack that can be fitted with passenger seating, bags or other cargo accessories.
- Xtracycle's $4,500 Swoop ASM cargo e-bike offers automatic gear-shifting.
- Shimano's system smartly decides shifts, but execution feels less smooth.
- Steel-framed bike features mullet wheels, suspension and versatile cargo rack.
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Cargo bikes are bicycles designed to carry children, shopping or other loads, often using a long frame and a reinforced rear rack. Electric assistance helps riders move heavy loads, while sensors in modern e-bikes can track speed and pedalling effort.
Shimano makes bicycle components, including electronic gear systems; Xtracycle builds cargo bikes. Automatic shifting uses information from the ride to select a gear for the rider, while manual shifting leaves that choice to them. Cargo-bike designs also vary in how they balance carrying capacity, comfort and fit for different riders.
These choices matter because a cargo bike may be used for everyday trips with changing loads and terrain. The ability to carry passengers or equipment, adjust the bike to its rider and choose how gears are controlled can all affect how practical it is to use.