Puma Rear Wheel Motor 250W

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  • mopu-r250-320b
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The well-known Puma 250W Motor is one of the most powerful gear motors . In addition to a lot... more

The well-known Puma 250W Motor is one of the most powerful gear motors. In addition to a lot of bang (power) for the buck the Puma 250W excels by its smooth-running freewheel. The 250W version is suited as a powerful pedelec motor with up to 900W maximum power input. The rear wheel motor features a standard thread for screw-on freewheels. Front wheel and rear wheel motors use a 6-hole-pattern disc brake mount. Delivery includes a motor extension cable with 100cm (40in) length, a 8-pin connector and a set of cap nuts, washers and tab washers.
Motor is not laced to a wheel. You can book this service separately.

Technical details Puma 250W Rear Wheel Motor
motor weight 4.1kg (9lbs)
motor diameter approx.
bolt circle diameter
Motors number of spoke holes 36
installation into rear wheel
Spacing 135mm
Rated continuous power 250W
Voltage 36V
Type Gear motor with freewheel
Hall sensors yes
Recuperation possible?
Brake disc mount yes
Cable exit at the axle, left side (in direction of travel)
Dimensions See drawing of dimensions in the gallery above

Rear wheel spacing

The 135mm spacing refers to installation with 6- or 7-speed freewheels. In case of 8- or 9-speed freewheels, washers need to be used in order to the freewheel not to rub at the frame. Spacing is increased by 3 to 5mm

Attaching brake disc

Front wheel and rear wheel motors use a 6-hole-pattern disc brake mount. With all PUMA motors the distance between brake disc and motor housing is 14.5mm for 160mm and 180mm discs and 24mm for 203mm discs. Experience has shown that the PUMA cannot be used with every disc brake system. Assembly is only possible with 203mm disc. To be compatible with almost all disc brake systems we recommend motors from BMC.

Note: To tighten brake disc to the motor use 5x8mm bolts only. Longer bolts could block the motor's mechanism and damage your conversion kit. Find suitable bolt here: 5x8mm stainless steel TORX bolts.

Instructions to operate PUMA 250W motors at 48V

Our PUMA 250W Motors are designed to work at 36V Operation at 48V is possible and will increase the respective system's top speed by a factor of 1.3. Please note that this way your bike is considered a pedelec no more by law. Also, with 275rpm and 320rpm motor versions a 12 FET controller has to be used. If interested, send us an email or call us. 

Choosing the right motor

Please choose below the matching revolution speed (rpm) for your rim size for 25kph at 36V rated voltage.

for wheel Ø in inches rpm at 36V approx. rpm at 48V
28" 200 260
26" 225 290
24" 250 325
20" 275 360
18" 320 415
for all wheel sizes 150 - very good climbing abilities 195
for all wheel sizes 175 - very good climbing abilities 230

Technische Details Puma 250W Hinterradmotor Motorgewicht 4,1kg... more
Technische Details Puma 250W Hinterradmotor
Motorgewicht 4,1kg
Speichenlöcher des Motors 36
Schraubkranzaufnahme 1-10-fach
Einbau in Hinterrad
Einbaubreite 135mm (1er-7er Schraubkränze)/
138-140mm (8er-10er Schraubkränze)
Lochkreisdurchmesser 173mm
Achsdurchmesser 14mm, Abflachung 10mm
Nenndauerleistung 250W
Spannung 36V
Bauart Getriebemotor mit Freilauf
Hallsensoren ja
Rekuperation möglich? nein
Bremsscheibenaufnahme ja, 6-Loch
Kabelaustritt aus der Achse / Fahrtrichtung links
Kabellänge 25 - 30cm
Steckerstandard EPMS
Abmessungen siehe Dimensionszeichnung in der obigen Bildergalerie
Hinweise zum Betrieb des PUMA 250W Motors an 50,4V Unsere PUMA 250 W Motoren sind zum... more

Hinweise zum Betrieb des PUMA 250W Motors an 50,4V

Unsere PUMA 250 W Motoren sind zum Betrieb an 36V ausgelegt. Ein Betrieb an 50,4V ist möglich und erhöht die Geschwindigkeit des jeweiligen Systems ca. um den Faktor 1,3. Beachten Sie, dass Ihr Fahrrad dadurch nicht mehr als zulassungsfreies Pedelec gilt. Bei den 275 U/min und 320 U/min Motorvarianten muss zudem ein 12 FET Controller verwendet werden. Kontaktieren Sie uns bei Interesse per Mail oder telefonisch. 

Montage der Bremsscheibe

Vorderrad- und Hinterradmotor sind mit einer 6-Loch Bremsscheibenaufnahme versehen. Der Abstand zwischen Bremsscheibe und Motorgehäuse beträgt bei allen PUMA Motoren 14,5 mm für 160er bzw. 180er Scheiben und 24 mm für 203er Scheiben. Die Erfahrung hat gezeigt, dass der PUMA leider nicht in Kombination mit allen Scheibenbrems-Systemen verwendet werden kann. Die Montage ist fast ausschließlich mit 203er Scheiben möglich.

Kompatibilitätstabelle für Controller / Motor


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