PEXMOR Electric Bike Conversion Kit: Options and Specs

Converting a standard bicycle into an e-bike has become one of the most cost-effective ways to add electric assist without buying a purpose-built motor bike. PEXMOR has built a lineup of hub motor kits covering a wide range of wheel sizes, voltage configurations, and motor positions, making them a common reference point in Conversion Kits discussions across r/ebikes and DIY cycling forums.

Choosing the right kit means matching voltage, wheel size, motor placement, and wattage to your actual use case. The sections below break down each PEXMOR option and what verified buyers say about real-world performance.

What Is a Hub Motor Conversion Kit?

A hub motor conversion kit replaces your existing front or rear wheel with a motorized wheel containing a brushless hub motor built into the hub shell. The kit typically includes the motor wheel, a controller, a throttle, a PAS (pedal assist sensor) ring, display hardware, and a wiring harness. You supply the battery separately.

Hub motor kits are the most common entry point for DIY e-bike builds. They require fewer mechanical skills than mid-drive conversions, don’t interfere with your drivetrain, and can be swapped between bikes as long as axle spacing and dropout width match. The trade-off versus a mid-drive system like a Bosch CX or Shimano EP8 is that hub motors apply force at the wheel rather than the crank, which affects handling balance and hill-climbing efficiency at low cadence. For flat-to-rolling terrain and commuter-style use, that trade-off is largely irrelevant.

PEXMOR kits fall into the budget-to-mid range tier of the conversion kit market. Spec data shows they use gearless direct-drive or geared hub configurations depending on the variant, paired with programmable 3-mode controllers. Battery is not included with any kit in this lineup, so factor that into your total build cost.

Top Picks

PEXMOR Electric Bike Conversion Kit 48V 1000W 26” Fat Front Wheel

The PEXMOR Electric Bike Conversion Kit, 48V 1000W 26” Fat Front Wheel is the fat-tire front-wheel variant in the lineup, designed for 26-inch fat bike rims. Spec data shows a 48V system running at 1000W nominal, paired with a 3-mode controller and LCD display. The fat hub motor accommodates wider dropout spacing common on fat-tire frames, which is a detail that standard-width hub kits miss entirely.

Verified buyers note that front-wheel hub placement on a fat bike shifts weight toward the front axle, which can feel heavy on technical terrain but works acceptably well on gravel paths and snow-packed routes where fat bikes are typically used. The LCD display inclusion at this tier is a useful addition over battery-indicator-only setups, giving real-time speed and assist mode data. Owner reports mention that the wiring harness labeling is functional but not as polished as kits from Bafang, so taking photos before cutting zip ties during installation is recommended. The PAS sensor and twist throttle ship in the box, covering both cadence-based assist and direct throttle control.

Check current price on Amazon.

PEXMOR Electric Bike Conversion Kit 48V 1000W 26” Rear Wheel

The PEXMOR Electric Bike Conversion Kit, 48V 1000W 26” Rear Wheel puts the motor in the rear hub, which is generally the preferred placement for balanced handling on standard bikes. Rear hub drive keeps front-end steering feel neutral and distributes motor weight over the rear axle, where most of a rider’s weight already sits.

Spec data shows this kit shares the 48V 1000W configuration with the front-wheel variant but omits the LCD display in favor of a battery indicator readout. That’s a meaningful difference for riders who want at-a-glance speed data. The 3-mode controller is carried over, and the kit includes both PAS and twist throttle. Verified buyers report that the 26-inch wheel fits standard 135mm rear dropout spacing on most older mountain bikes and hybrid frames, though confirming your specific bike’s dropout width before ordering is important. Forum reports on r/ebikes indicate that heat management under sustained load at full 1000W is typical of this wattage class, and riders on long climbs should expect some controller throttle-back behavior.

Check current price on Amazon.

PEXMOR Electric Bike Conversion Kit 48V 1200W 26” Rear Wheel

The PEXMOR Electric Bike Conversion Kit, 48V 1200W 26” Rear Wheel steps up to 1200W nominal, making it the higher-output rear-wheel option in the PEXMOR range. The 200W increase over the 1000W rear kit is not a dramatic performance jump in real-world flat-terrain use, but verified buyers note a measurable difference on sustained grades and when carrying load.

This kit uses the same 26-inch rear wheel format and 3-mode controller architecture, with PAS and twist throttle included. Like the 1000W rear variant, it uses a battery indicator rather than a full LCD display. Field reports indicate the 1200W motor produces more heat under extended full-throttle use, which is consistent with higher-rated hub motors in this class. Riders planning heavy cargo hauling or regular steep-grade commuting may find the 1200W output justifies the consideration over the 1000W version. As with all kits in this lineup, the battery is sold separately, and a 48V battery with adequate amp-hour capacity is necessary to sustain 1200W draw without premature voltage sag.

Check current price on Amazon.

PEXMOR Electric Bike Conversion Kit 36V 750W 24”/20” Front Wheel

The PEXMOR Electric Bike Conversion Kit, 36V 750W Ebike Conversion Kit, 24”/20” Front is the lower-voltage, smaller-wheel option in the lineup, targeting 24-inch and 20-inch wheel formats. Spec data confirms 36V 750W output, which is the federally defined Class 1/2/3 assist threshold and keeps the kit compliant with most US e-bike regulations without additional modification.

The inclusion of an LCD display here, alongside a torque arm in the box, reflects thoughtful kit packaging for smaller-wheel bikes that typically have lighter frames. The torque arm is important for front hub installations because a 750W motor generates enough reaction torque to rotate the axle in an aluminum dropout under hard acceleration. Verified buyers using this kit on 20-inch folding bikes and 24-inch cruisers note that the motor response is smooth relative to the battery-indicator-only kits, likely due to the LCD controller calibration. This is a practical kit for smaller bikes, step-throughs, and secondary-use builds where outright power matters less than legal compliance and light integration.

Check current price on Amazon.

PEXMOR Electric Bike Conversion Kit 48V 1200W 26” Front/Rear Wheel

The PEXMOR Electric Bike Conversion Kit, 48V 1200W 26” Front/Rear Wheel is the most versatile hardware option in the PEXMOR range because the motor wheel can be configured for either front or rear installation. Spec data shows 48V 1200W output with the full LCD display and PAS plus twist throttle in the box.

Having a front/rear-compatible wheel gives builders flexibility when deciding on placement after the fact, which is useful if you’re converting a bike with an unusual dropout configuration on one end. Owner reports note that this kit’s LCD display shows more ride data than the battery-indicator variants, which buyers consistently identify as a quality-of-life advantage during daily use. The 1200W output at 48V is toward the upper end of what most standard bicycle frames are designed to handle, so frame material, dropout condition, and axle retention hardware all warrant inspection before installation. Verified buyers recommend adding axle retention hardware (torque arm or axle washers) regardless of which end the motor is installed on at this wattage.

Check current price on Amazon.

PEXMOR Electric Bike Conversion Kit 20” Front Wheel Adult

The PEXMOR Electric Bike Conversion Kit, 20” Front Wheel Adult is a dedicated 20-inch front-wheel kit running at 36V 750W with an LCD display. This is the most compact and lightest-output kit in the lineup, built specifically for the 20-inch wheel format found on BMX-derived frames, folding bikes, and smaller adult bikes.

Verified buyers using this kit on folding commuters and compact urban bikes report that installation is straightforward relative to larger kits, partly because 20-inch frames tend to have simpler front fork geometry. The 36V system is more forgiving on battery selection than the 48V kits, and a wider range of compatible 36V batteries is available in the aftermarket. Field reports from cycling communities indicate that motor response on the 20-inch wheel is adequate for flat-to-moderate terrain but less suited for carrying cargo on extended grades, which is consistent with the 750W output. This kit targets a specific use case and executes it cleanly rather than overpromising capability.

Check current price on Amazon.

Buying Guide: Choosing a PEXMOR Conversion Kit

Voltage and Wattage: Matching Output to Use Case

The PEXMOR lineup splits between 36V and 48V systems. A 36V 750W kit is sufficient for flat-to-rolling terrain, lighter riders, and legally compliant builds under US federal e-bike definitions. Moving to a 48V system raises both top-end speed potential and sustained hill-climbing capacity.

Wattage ratings in hub motor kits are often nominal figures, meaning peak draw can exceed the stated number under load. A 48V 1200W kit will pull more current on steep grades than a 48V 1000W kit from the same manufacturer, which means your battery’s continuous discharge rating (C-rating and amp-hour capacity) needs to match the motor’s demand. Riders exploring the broader Conversion Kits market should apply this same voltage-to-use-case logic across all hub motor brands, not just PEXMOR.

Front vs. Rear Motor Placement

Rear hub motors deliver better traction on climbs because the driven wheel carries more of the rider’s weight. Front hub motors are easier to install on many bikes because the front fork is simpler than a rear triangle with derailleur hardware, and they avoid the chain/cassette compatibility questions that rear hubs raise.

The PEXMOR front kits make sense for bikes with complex rear dropouts, internally-geared hubs, or belt drive systems where a rear hub swap would be more disruptive. For most standard derailleur bikes on mixed terrain, the rear hub placement produces a more natural ride feel. At 1000W and above, front hub installations require a torque arm to prevent axle rotation under load.

Wheel Size Compatibility

PEXMOR kits are available in 20-inch, 24-inch, and 26-inch fat-tire formats. Wheel size is not interchangeable between kits, and the motor hub lacing pattern is matched to the rim included in the kit. Confirmed spec data shows the fat front wheel kit uses wider hub spacing to accommodate fat rims.

Before ordering, measure your current wheel diameter and check whether your bike uses a standard or fat rim. A 26-inch standard rim and a 26-inch fat rim have different hub flange and spoke configurations. Ordering the wrong wheel size is the most common installation issue reported by verified buyers in this category.

Controller Modes and Display Options

PEXMOR kits ship with a 3-mode controller across the entire lineup. The three modes typically correspond to low, medium, and high assist levels, though the specific power limits per mode vary by controller firmware and can sometimes be adjusted via the display on LCD-equipped variants.

Kits with an LCD display (the 48V 1200W front/rear, the 36V 750W kits, and the fat front wheel kit) show real-time speed, assist mode, and battery percentage. Kits with a battery indicator only show a simplified state-of-charge readout. If you want detailed ride data, filter specifically for LCD display kits within the PEXMOR lineup before purchasing.

Battery Sourcing and Compatibility

No PEXMOR conversion kit includes a battery. This is standard practice at this tier of the e-bike conversion kit market and gives builders flexibility to choose battery capacity based on their range goals. A 36V kit requires a 36V battery; a 48V kit requires a 48V battery. Mixing voltage is not compatible and will damage the controller.

For range planning, a 48V 15Ah battery provides meaningfully more range than a 48V 10Ah battery, and the extra capacity matters on longer routes or hilly terrain where the motor draws more current per mile. Verify that the battery connector type matches the kit’s wiring harness before finalizing a battery purchase, as XT60 and proprietary connectors are common but not universal.

Frequently Asked Questions

Does the PEXMOR conversion kit come with a battery?

No PEXMOR kit in this lineup includes a battery. The kits ship with the motor wheel, controller, PAS sensor, throttle, and display hardware. You source the battery separately and need to match the voltage to your specific kit (36V for the 750W kits, 48V for the 1000W and 1200W kits). Battery connector compatibility is also worth verifying before purchasing a battery from a third-party supplier.

Can I install a PEXMOR kit on a bike with disc brakes?

Hub motor wheel compatibility with disc brakes depends on whether the motor hub includes the correct rotor mounting interface. Verified buyers report that some PEXMOR hub motors include a disc rotor mount, but confirming this detail in the product listing before ordering is important. If the motor hub does not support a disc rotor, you may need to retain the original wheel for braking or switch to rim brake hardware.

What tools are needed to install a PEXMOR conversion kit?

Basic installation requires tire levers, cone wrenches to fit the hub axle nuts, wire cutters for zip ties, and a pedal assist sensor ring tool or thin wrench for the bottom bracket PAS ring. An axle torque wrench is useful for confirming proper axle retention, especially on front fork installations at higher wattages. Verified buyers without mechanical experience generally report that the installation is manageable with a combination of the included instructions and forum video guides.

Is a PEXMOR 1000W or 1200W kit street legal in the United States?

US federal e-bike regulations define Class 1, 2, and 3 e-bikes at a maximum of 750W continuous output. A 1000W or 1200W nominal kit operates above that threshold, which means it may not qualify as a federally defined e-bike and could be subject to different regulations on public roads and bike paths depending on your state. The 36V 750W kits in the PEXMOR lineup fall within the federal limit. Riders should check state and local regulations before riding higher-wattage builds on public infrastructure.

Will a 26-inch PEXMOR kit fit a mountain bike with boost spacing?

Standard PEXMOR rear hub kits use 135mm axle spacing, which is the common standard for older mountain bikes and hybrid frames. Modern mountain bikes using boost rear spacing (148mm) are not compatible without modification. Front fork spacing varies as well, with many modern hardtails using 110mm boost front spacing versus the traditional 100mm standard. Verified buyers on MTBR confirm that checking your specific frame’s dropout width before ordering is necessary to avoid an incompatible fit.

![pexmor electric bike conversion kit](/images/articles/conversion-kits-19.webp)

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