The first filter when converting a bike to electric power is fit: the motor wheel has to match the wheel you already have. These two front/rear hub conversion kits illustrate the choice between a compact wheel build and a full-size wheel build. Both can be mounted on the front or rear wheel. Choosing between them is mostly about matching the wheel size to your frame.
Quick Verdict
Pick the TBvechi 20-inch kit if your bike has 20-inch wheels. Pick the 700C conversion kit if your bike has 28-inch, 29-inch, or 700C wheels. Prices and motor details are in the table below.
Price & Spec Comparison
| Product | Listed Price | Price Bar | Wheel Fit | Motor Type | Assist Control |
|---|---|---|---|---|---|
| TBvechi 20-inch hub kit | USD 188.46 | 20-inch | Brushless geared, front/rear hub | 5 magnetic point assist sensor | |
| 700C front/rear wheel kit | USD 199.44 | 28-inch, 29-inch, 700C | Brushless gearless, front/rear hub | 5 gear adjustment |
Where Each Kit Wins
The TBvechi kit gives you power flexibility: you can set it up as a 36V 250W motor for a gentle ride or as a 48V 1000W motor for stronger acceleration. The 700C kit is a fixed 48V 1000W system with a listed top speed of 45-55 km/h, so it's the higher-speed choice of the two. Both kits come with a power-off brake lever that works with V brakes and disc brakes, so your existing brakes are fine. If you prefer a one-setting 1000W kit with a higher speed ceiling, the 700C is the direct pick; the TBvechi is the pick when you want the freedom to dial down to 250W.
Product Notes
TBvechi 20-inch 250/1000W Hub Kit
This is the lower-priced kit of the two at USD 188.46. The bundle includes the brushless geared motor, a controller, an SW-810LED display, and a power cut-off brake lever. The 5-magnetic-point assist sensor gives you a pedal-assist feel that responds to your pedaling. The kit can be wired as a 36V or 48V motor, which gives you a genuine choice between a gentler ride and a stronger one. Keep in mind that the controller wiring requires careful color-matching to avoid damage, and the kit is not waterproof, so it's not suited for rainy rides. The display shows your riding data, and the brake lever cuts power when you brake, which is a helpful safety touch.
700C 48V 1000W Conversion Kit
The kit lists aluminum-alloy construction and a 3-year manufacturer warranty, which adds confidence for a permanent conversion. The brushless gearless motor runs at 48V 1000W, and the five-gear adjustment gives you different assist levels. Note that you'll need to supply a 48V 13AH or higher battery, as it's not included. If you were hoping for a 250W mode, this kit doesn't offer one-it's strictly 1000W. The 3-year warranty and aluminum-alloy construction are notable extras for a high-power conversion kit.
Final Choice by Use Case
Choose the TBvechi kit for its dual-power flexibility. Choose the 700C kit if you want the faster listed top speed and the 3-year warranty. Both kits leave the battery to you, so set aside space in your budget for one.
