Dolphin 250W Brushless Hub Motor for Electric Bicycle Conversion Style A

This Dolphin electric bicycle motor offers a practical, cost-effective way to upgrade a standard bicycle with electric assistance. Designed as a direct-fit conversion component, it simplifies the process of adding a 250W brushless hub motor to your existing bike frame. With a rated speed of 2650RPM and a lightweight 2kg build, this motor provides consistent power for commuting, errands, or recreational cycling without adding excessive weight. Its brushless design ensures efficient operation and lower maintenance compared to brushed alternatives. The adjustable mounting hole distance of 42-95mm and four mounting points allow secure attachment to a wide range of bicycle dropouts. This makes the Dolphin motor a versatile choice for DIY e-bike projects, helping riders gain electric assistance without needing to purchase a complete new electric bicycle.

Features and Construction

The motor is built around a brushless hub design, which reduces friction and wear compared to traditional brushed motors. Key electrical specifications are provided to help users understand its power demands and operational characteristics during conversion projects.

Power and Speed

Rated at 250W with a rated speed of 2650RPM, this motor delivers consistent assistance across typical commuting speeds. The rated current of ≤13.7A ensures the motor operates within safe electrical limits, while the no-load current of 0.7-1.4A indicates low power draw when not under load. These figures help users select an appropriate battery and controller for reliable daily use.

Size and Practical Fit

Weighing only 2kg, the motor reduces the extra weight often associated with electric conversions. Its mounting hole distance of 42-95mm accommodates a range of bicycle frame dropouts, with four mounting holes for secure attachment. This flexibility makes it suitable for many common bicycle types, including mountain bikes, hybrids, and city bikes.

Uses and Placement

The motor is intended for DIY electric bicycle conversions. Riders can install it on their existing bike to gain electric assistance without purchasing a complete new e-bike. Its brushless hub design integrates neatly into the wheel, maintaining the bike's original appearance and handling.

Commuting and Daily Travel

With 250W of power, the motor is well-suited for flat or gently hilly urban routes. It helps riders maintain speed with less effort, making daily journeys less tiring. The lightweight 2kg build means the bike remains easy to manoeuvre when riding without assistance.

Leisure and Fitness

For recreational cyclists, the motor provides on-demand assistance, allowing longer rides or assistance on inclines. Riders can choose to use pedal power, motor assist, or a combination of both. This flexibility makes the motor suitable for those wanting to extend their cycling range or reduce fatigue on longer outings.

Benefits and Buying Value

This motor offers a cost-effective way to convert a standard bicycle into an electric one. Its straightforward installation and lightweight design add to its practical value, making it an accessible upgrade for many cyclists.

Easy Conversion Process

The motor's adjustable mounting hole distance simplifies fitting to various bicycle frames. The single-unit package includes the motor itself, ready for integration with a compatible controller and battery. The four mounting holes provide secure attachment, and the brushless design reduces the need for frequent maintenance.

Why Choose This Product

For cyclists seeking electric assistance without the expense of a new e-bike, this Dolphin motor provides a practical upgrade path. Its 250W rating meets common regulatory limits for electric bicycles in many regions, keeping the conversion road-legal in applicable areas. The lightweight 2kg design and adjustable fit make it a versatile and user-friendly choice for DIY enthusiasts.