BAFANG M325 M625 Mid Drive Electric Bike Conversion Kit Review: Worth $369 in 2026?
The BAFANG M325/M625 mid drive ebike conversion kit delivers 160 N.m torque and up to 34 mph across three motor options (500W, 750W, 1000W) at $369.66 — strong value if you have a compatible 68–73mm bottom bracket bike and basic mechanical skills.
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Best For
How this e-bike scores for different riding styles
The 1000W motor option, 160 N.m torque, and 55 km/h (34 mph) max speed deliver impressive performance metrics. Mid-drive placement provides superior power delivery compared to hub motors for enthusiast riders.
The 160 N.m max torque and powerful mid-drive design excel at climbing steep mountain trails. The M625 motor is specifically designed for challenging terrain, making this kit highly capable for off-road adventures.
The 500W-1000W motor options and 55 km/h (34 mph) max speed provide excellent commuting performance. However, as a conversion kit without a complete battery, the actual range depends on the user's battery choice, which adds complexity for daily reliability.
Four riding modes including pedal assist and walk assist offer versatility for casual riding. The moderate acceleration program makes it beginner-friendly, though the high power may be excessive for pure leisure use.
The 160 N.m torque provides strong hauling capability, and mid-drive motors are ideal for cargo bikes. However, the kit itself doesn't include cargo-specific features like racks or reinforced frames.
This is a conversion kit for existing bikes, not a folding solution. It adds motor and battery weight to your current bike, reducing portability rather than enhancing it.
Our Verdict
The BAFANG M325/M625 mid drive electric bike conversion kit transforms a standard bicycle into a capable e-bike using a magnesium alloy motor that weighs less than comparable aluminum hub-motor kits. The 500W, 750W, and 1000W variants share the same chassis, letting riders choose power output based on local e-bike regulations without changing the installation process.
At $369.66, the BAFANG M325/M625 sits below most complete entry-level e-bikes while delivering 160 N.m of torque — enough to climb 15–20% grade inclines that 250W hub motors struggle with. The mid-drive placement keeps the bike's center of gravity low, improving handling on mountain bike frames.
The kit requires a separate battery purchase. A compatible 48V 15Ah pack adds roughly $200–$400 to total cost, bringing the all-in price to $570–$770. The open battery standard means you can source any 48V or 52V pack, including cheaper third-party options, unlike proprietary systems that lock you into brand pricing.
The included G321 display mirrors smartphone navigation and logs cadence, calorie burn, and ride time via a companion app. Three color themes are selectable on-screen. Walk-assist mode engages at 3.7 mph, useful when pushing the bike uphill.
Installation requires removing the existing bottom bracket and pressing in the BAFANG M325/M625 spindle — a job that takes 2–3 hours with a bottom bracket tool and basic bike stand. The kit is only compatible with frames measuring 68–73mm at the bottom bracket shell, excluding many road and gravel frames with 86mm threaded or PF30 standards.
What We Like
- 160 N.m torque from mid-drive motor climbs 15–20% grades that 250W hub motors cannot handle
- Three motor options — 500W, 750W, 1000W — fit different local e-bike power regulations without hardware changes
- Compatible with any 48V or 52V battery brand, avoiding $150–$300 proprietary battery premiums
- G321 display mirrors phone GPS navigation and tracks cadence, calories, and ride time in real time
- Magnesium alloy motor housing reduces kit weight vs. comparable steel hub-motor conversion sets
What Could Be Better
- Battery sold separately; a compatible 48V 15Ah pack adds $200–$400, raising total cost to $570–$770
- Only fits 68–73mm bottom bracket shells, excluding road, gravel, and many hardtail frames with 86mm or PF30 standards
- Installation requires a bottom bracket removal tool and 2–3 hours of mechanical work — no plug-and-play option
- No UL 2849 electrical system certification listed, which some insurers and shared-path regulations require
- Kit includes no integrated lighting or horn; riders must budget an additional $30–$80 for compliant accessories
Standout Features
Frequently Asked Questions
Common questions aboutBAFANG M325 M625 Mid Drive Kit : 48V/52V 500W 750W 1000W Ebike Conversion Kit with Battery & Ebike Display, 8fun New G321 Ebike Kit for Mountain Bikes Road City Bicycle (68-73mm Bottom Bracket)
What battery do I need to buy separately for this kit?
You need a 48V or 52V battery with any capacity you choose. The kit accepts downtube or rear rack style batteries from any brand. Most riders pick 500-750Wh batteries for 40-60 mile range.
Will this kit fit my bike?
Your bike needs a bottom bracket that is 34-36mm diameter and 68-73mm wide. Most mountain bikes, road bikes, and commuter bikes meet this requirement. Measure your bottom bracket before ordering.
How fast can this motor go?
The motor reaches 55 km/h, which equals 34 mph. The 500W version meets Class 2 e-bike laws in most US states. The 750W and 1000W options may require registration in some areas.
Do I need special tools to install this kit?
You need a bottom bracket removal tool, torque wrench, and basic bike tools. The installation video shows each step. Most people with bike repair experience complete installation in 2-3 hours.
What riding modes does this kit offer?
You get four modes: full electric, pedal assist, walk assist, and regular pedal. Pedal assist has multiple levels to control how much the motor helps. Walk assist pushes the bike at 3-4 mph when you walk beside it.
Best For
How this e-bike scores for different riding styles
The 1000W motor option, 160 N.m torque, and 55 km/h (34 mph) max speed deliver impressive performance metrics. Mid-drive placement provides superior power delivery compared to hub motors for enthusiast riders.
The 160 N.m max torque and powerful mid-drive design excel at climbing steep mountain trails. The M625 motor is specifically designed for challenging terrain, making this kit highly capable for off-road adventures.
The 500W-1000W motor options and 55 km/h (34 mph) max speed provide excellent commuting performance. However, as a conversion kit without a complete battery, the actual range depends on the user's battery choice, which adds complexity for daily reliability.
Four riding modes including pedal assist and walk assist offer versatility for casual riding. The moderate acceleration program makes it beginner-friendly, though the high power may be excessive for pure leisure use.
The 160 N.m torque provides strong hauling capability, and mid-drive motors are ideal for cargo bikes. However, the kit itself doesn't include cargo-specific features like racks or reinforced frames.
This is a conversion kit for existing bikes, not a folding solution. It adds motor and battery weight to your current bike, reducing portability rather than enhancing it.
Scores
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