Electric Bike Conversion Kit 250W–3000W — MTX Rear Hub Motor | All4eBikes Romania
Turn any MTB, trekking, city bike or fat bike into a high-performance e-bike with All4eBikes conversion kits. Our range covers the full power spectrum — from the 250W kit with speed limited to 25 km/h, up to the 3000W kit for extreme performance — all with a brushless gearless direct-drive motor, dual-mode Hall/non-Hall controller, SW900 LCD display, 12-magnet PAS sensor, and complete wiring. Not sure which kit is right for you? Read our kit selection guide — find out in 2 minutes what power, battery, and wheel size you need. Free shipping in Romania on orders over 500 RON, 24-month warranty on the motor and 12 months on the other components, technical support included.
Every kit includes the motor wheel, 7-speed freewheel, controller, SW900 LCD display, full-twist throttle, PAS sensor, brake levers with motor cut-off, two torque arms and complete wiring. The battery and charger are bought separately.
How to Choose the Right Power for Your Conversion Kit
Motor power determines speed, torque and battery consumption. Here are the four main rider profiles across our range:
250W — Discreet and Silent
Gentle gradients, speed limited to 25 km/h. A silent motor, under 60 dB, with low battery consumption.
500W — Moderate Climbs
Gradients up to 15–18%, normal load. 50% more torque than the 250W (30 vs 20 N.m), with firm acceleration off the line.
1000W — Real Performance and Cargo
Constant 5–20% gradients, 30–50 kg loads. Continuous power — not a short-lived peak.
1500W / 2000W / 3000W — Maximum Torque
Fat bike, extreme gradients, torque up to 110 N.m. For experienced riders who want maximum performance.
Direct-Drive Motor — What You Get in the MTX Kits
All All4eBikes kits use brushless gearless direct-drive motors — no gears, no moving mechanical parts, force transferred magnetically straight from the stator to the rotor. The advantages over geared hub motors are clear:
- Completely silent operation under 60 dB — at any power level
- Zero mechanical wear — a practically unlimited service life
- ~90.5% efficiency on the 3000W kit — less heat, more motion
- Sealed casing — weatherproof for year-round use in any conditions
- Dual-mode Hall/non-Hall controller — the motor keeps running even if the Hall sensors develop a fault
What Every Electric Bike Conversion Kit Includes
- Brushless gearless motor built into the rear rim (26", 27.5" or 29" depending on kit)
- Dual Hall/non-Hall controller — dual-mode 36V/48V on the 250W, then 22A (500W), 25A (1000W), 35A (1500W), 45A (2000W) and 60A (3000W)
- SW900 LCD display with speed, battery level, total distance and PAS assist level
- Full-twist throttle with battery indicator
- 12-magnet PAS sensor for natural pedalling assistance
- Brake levers with cut-off sensor — automatic motor stop on braking
- 7-speed freewheel — 1.375 x 24 TPI thread (8–12 speed cassettes do not fit)
- Two torque arms with clamps, included in every kit
- Complete wiring harness and mounting hardware
Need spare parts, alternative controllers, or accessories for your build? Find everything you need in the eBike Parts section.
Compatibility — Which Bikes Can Be Converted
Our kits are compatible with most standard bicycles with a 135mm quick-release rear axle. Check before ordering:
- Wheel size — 26", 27.5" or 29" (availability varies per kit)
- Rear axle type — 135mm quick-release (standard MTB, trekking, city bike)
- Brake type — disc or v-brake, both compatible with the levers included in the kit
- Frame space — for a downtube or triangle battery, depending on the format chosen
The 2000W and 3000W kits include multi-voltage controllers (48V–72V), giving maximum flexibility when choosing a battery; the 1500W kit runs on 48V or 52V.
Recommended Battery for Your Kit
Kits are sold without a battery. When ordering you can add one of the optional batteries of the kit you choose. Find the complete range of downtube and triangle Li-ion batteries, 36V to 72V, with integrated BMS and USB port, in the eBike Batteries category.
Shipping, Warranty and Technical Support in Romania
All orders benefit from free shipping in Romania on orders over 500 RON, a 24-month warranty on the motor and 12 months on the other components, and dedicated technical support to help you at every step of your eBike conversion — from choosing the right kit to your first ride with the motor running. Installation takes an average of 2–3 hours and requires no special tools.
Frequently Asked Questions About eBike Conversion Kits
The 250W kit has speed limited to 25 km/h and is the easiest to fit in the range. The 500W kit gives 30 N.m, for moderate climbs. The 1000W kit gives 40 N.m, for long gradients and cargo. The 1500W, 2000W and 3000W kits give from 50 up to 110 N.m, for heavy loads and maximum performance. See the full kit comparison.
The 1000W kit delivers double the continuous power of the 500W, with a stronger controller (25A vs 22A) and consistent performance on gradients from 5% up to 20%. The 500W kit is recommended for moderate climbs and a normal load. The 1000W kit is chosen by cargo riders (30–50 kg loads) and those with routes involving long, steep gradients.
Most kits are compatible with standard bicycles with a 135mm quick-release rear axle — MTB, trekking, city bike and fat bike. Check the wheel size (26", 27.5" or 29"), axle type, and brake type before ordering. Bicycles with a thru-axle are not compatible with standard kits.
When ordering you can add one of the 1000W kit's optional batteries: 48V 17.5Ah Downtube, 48V 22.5Ah Downtube, 52V 24Ah Downtube, 52V 20Ah Triangle or 48V 20Ah Triangle. You can see them with prices on the kit page.
For rear hub motor kits (all kits in our range), installation takes an average of 2–3 hours and requires no special tools — 2.5, 3 and 5 mm hex keys, an adjustable wrench and a screwdriver are enough. On our blog you will find a step-by-step installation guide with photos for every stage of the process.
The dual-mode controller runs primarily on Hall sensors for smooth start-up and precise throttle response. If the Hall sensors develop a fault, the controller automatically switches to non-Hall mode and the motor keeps running without interruption — you will not be stranded mid-route because of a sensor issue. An important difference compared to single-mode controllers.