EBike Motors Non-Hub-Rear

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non hub wheel drives

These drives use a sproket directly attached to the wheel for driving it. They do not use the bicycle drive train and so they have different advantages and drawbacks than the common Middrives described above. Most non hub wheel drives use a two stage reduction. The first stage often is a belt or gear drive, a chains and belt drives are most common as a final reduction drive.

There is a pic of MattyCii's non hub wheel drive [1] below as an example. He used a recumpence V4 belt drive kit [2] and an Astro burshless inrunner motor.

These drives are mostly custom made, but there are also complete after market kits which are made in china. These aftermarket kits mostly include brushed 24V motors ranging from 250 to 450 watts and come with a bicycle chain sprocket which drives a sprocket at the rear wheel.

Single speed.JPG

Currie - eZip & iZip

The largest volume and least expensive eBikes are produced by Currie under the eZip and iZip brands.

Until recently, these eBikes exclusively used a gear reduction motor to power the rear wheel.

  • Available with 250w and 450w 24V brush motors, power was transferred through a rear hub freewheel.

EZip Drivetrane.JPG

XYD-16 Bracket.JPG

Sold in the USA since 2007.


  • 15-16 mph motor only speed
  • 450w 24V brush gear reduction motor
  • 10Ah SLA RMB battery pack (Rack mounted with key lock.)

I've been running them since 2008 and found them very easy to upgrade-enhance.


  • 36V - 150% speed (23 mph) and torque (some risk of overheat!)
  • 16T mod - replace oem 20T freewheel with 16T ACS Southpaw = 20 mph motor only speed and improved torque above 10mph!
  • 33.3V - 138% speed (20+ mph) and torque
  • 25.9V 25.92Ah LiPo Battery (in oem pack)
  • 25.9V 31.2Ah Li-ion Battery (in oem pack)
  • 33.3V 31.2Ah Li-ion Battery (in oem pack)
  • Note - Speed-Torque lines are for gearing ratio comparisons and do not represent "torque curves".

7s vs 9s 20mph.jpg

Original production motor, still available, is the rather noisy MY1018Z - a straight cut gear-reduction motor, later models use the XYD-16 helical cut gear, gear reduction motor - much quieter.

These motors are beginning a whole new life!

  • They are the nearly perfect size and gear ratio-rpm to be placed between the cranks as a mid drive through the rear sprockets.
  • The conversion to a crank freewheel provides the equivalent of a 5-6-7-8 speed motorcycle ... with matched pedal assist!

MY1018z (24V 450w) motor @ 33.3V (625w) though DNP 34-11T 7spd Freewheel

  • Note - Speed-Torque lines are for gearing ratio comparisons and do not represent "torque curves".

Crank Drive - 33.3V.jpg

Crankin' It - Mid-Mounted Crank Drive - in progress ...