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Motor Assist

We use the best motors available, powered by the best batteries. Hills are no problem and day-long battery range is common.

Iceni Cycles Motor Drive

Heinzmann RN111

Cargo Power motor system has been designed specifically for heavy duty cargo applications.  This is an AC motor with steel planetary gears, providing up to 115Nm of torque, nearly twice any other motor giving solid performance and hill climbing ability.  The axle bearings are rated at 200kg load and the internal gears are oil cooled providing maximum reliability and longevity.

The fully programmable controller is industrial rated for long life, continuous rated 250w with a peak power of 1350w.  For off road applications or North American market can be re-programmed for up to 600w continuous rating.

Walk assist / hill start function, speed controlled to 25kmh, integrated toque sensor or PAS.

Heinzmann RN111 motor assist unit

Motor Assist FAQs

What is the maximum power I can use in the EU and Uk?

For electrically assisted trike a continuous rating of 250w with a pedal sensor and maximum speed of 25kmh is legal without type testing.

All electric bikes more powerful than 250W continuous rated are required to display a tax disc, with insurance mandatory and with the vehicle registered. It needs to display a number plate and carry an MOT certificate. Any rider of such a vehicle must hold a current driving licence and keep to the laws appertaining to mopeds. Anyone found riding an electric bike more than 250W rated power without the correct documentation is liable to be prosecuted by the police. The rider will be open for prosecution for driving without a licence, driving without insurance, driving an unlicensed vehicle etc. If the person riding such a vehicle has a current driving licence and is prosecuted, they will receive penalty points and may even be banned from driving any motor vehicle.

Can I ride a more powerful trike?

In the UK you can ride a twist and go trike of up to 1000w continuous with a speed cut off of 25kmh as long as it has type approval and you are over 14 years of age.

25th February, 2015 in Electric bike news

IVS (International Vehicle Standards), the DFT division responsible for vehicle safety, has today confirmed that although ‘twist and gos’ – electric bikes capable of being powered by a throttle – will require type approval from 2016, those with power cutting out at 15.5mph will “not be considered motor vehicles and will not therefore require registration, tax, insurance and rider licensing”, said a spokesman to Pedelecs this afternoon.

Cycles designed to pedal equipped with an auxiliary propulsion with the primary aim to aid pedalling and

Output of auxiliary propulsion is cut off at a vehicle speed ≤ 25km/h and

Maximum continuous rated or net power ≤ 1000w and

Type approval can either be obtained by a vehicle manufacturer approving in volume (the UK type approval authority is the Vehicle Certification Agency) or by an individual seeking a Motorcycle Single Vehicle Approval, conducted by the Driver and Vehicle Standards Agency (DVSA).

As part of the 6th April amends to EPAC or EAPC legislation, ‘marking’ or manufacturer’s plates, will also require the plate to show the maximum assisted cut­-off speed, in addition to the existing requirements of manufacturer, battery voltage and maximum continuous rated power.

IVS also clarified: “There is no change to the law with regards to age, that remains in place, no person under the age of 14 may ride an EPAC or EAPC.”

What configuration is best?

This is of course a matter of personal choice, to help you decide consider the following points.

Front wheel hub motor, fairly simple to install and pulls you along the road. This is ungeared and usually set to max speed of 25kmh.  You will need strong front forks and headset bearings to cope with additional loading. Main disadvantage is a lack of grip on slippery inclines, especially if the rear cargo section has a large overhang at rear wheel.  The Iceni Trike has very good weight distribution and so works well with front wheel drive.

Crank motors are becoming very popular with 2 wheelers, not so suited to heavy cargo trikes. The main and considerable advantage is the ability to use the gears to give you increased hill climbing ability coupled with rear wheel drive for improved traction. Main drawback is you are putting a great deal of strain through the drivetrain in terms of 9 speeds chains, derailleurs, NuVinci or geared hubs, this can lead to premature wearing and possible mechanical failure. Warranty offered on expensive crank motor kit and gearboxes are often void if used in a commercial cargo trike application.

Mid drive motor, fitted independently of the crank and gear system, usually placed under the cargo box and drives the differential directly via uprated chains. This has several advantages including improved traction through rear wheel drive, motor axle not having to supporting the weight of trike as in hub motors, various gearing options can be configured enabling improved hill climbing ability or top speed. Regenerative braking is often available in this set up.

Brushed DC Motors, established, robust and simple, often internally geared and offers good torque performance though can be rather noisy. Needs attention to brushes which can be difficult to replace and often uses composite or plastic gears which will wear down quickly in a cargo trike application. A good cheap motor solution with some hill climbing ability.

AC or DC brushless Motors, same reliability but less noise and more efficient, are becoming the industry standard. Direct drive motors do not use internal gears and as such are particularly suited to cargo trike application and can offer regeneration. Geared versions ideally need to use planetary steel gears for reliability, try to avoid plastic/composite gears.

Motor assist

Unique Features

Our E-Trikes have a range of unique features, making them reliable, sustainably and affordable.

Unique design features


Our trikes have a uniquely low load platform for easier loading and safer handling.

The Iceni E-Trike Range

Iceni e-cargo trike

e-Cargo Trike

Developed in liaison with couriers, our powerful e-Cargo Trike can be relied on to work all day in safety and ease.

Available from £POA
Lease from £POA a week

Iceni pickup trike

Pickup Trike

A versatile ‘flat-bed’ trike for large and bulky loads. Build your own retail unit, the possibilities are endless.

Available from £POA
Lease from £POA a week

Iceni adventure trike

Adventure Trike

Designed to carry wheelchairs users in safety and comfort this versatile trike is a life-changer for many.

Available From £POA (VAT exempt)
Lease from £POA a week

AES trike batteries


Always difficult to predict but experienced customers report of regular 40-mile days without a swap.

Extensive spares list

Spares List

Our extensive list of spares means your E-Trike can quickly be repaired and be back on the road.