Smart Rear Motor E-bike Conversion Kit SMA-Q

100% of 100
In stock
Special Price $320.20 was $343.00
  • Simple combination to let you convert your bike to e-bike with the lowest cost.
  • Motor integrated smart torque sensor, it is easier on a gentle or steep slope and increases energy efficiency by 50%.
  • 7 colors bottle battery, with lock and USB connector to ensure safety and easy charging as a power bank.
  • Delivery in 5-7 working days.
  • Warranty for the motor is 24months, others are 12 months.

Download the e-bike conversion kit SMA-Q installation manual. 

Download the manual of  OMT-M3 LCD display manual.rear 250W 350W electric bike kitrear 250W 350W electric bike kitbest electric bike kitebike kit with torque sensortorque send best electric bike conversion kit350W electric bike kit

Choose a bigger battery?

If you want a bigger battery, please choose the down tube battery instead of the bottle battery.

electric bike down tube li ion battery

About Tax/ Duty

1. Order without Wheel Rim: Tax are own by the buyer.

2. Order with Wheel Rim: Tax-free to EU, UK, USA.

More popular electric bike conversion kits

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More Information
Voltage 36V
Wattage 250W or 350W
motor type Rear geared hub motor
Controller 36V intelligent controller
Battery & Charger Down tube bottle battery 5.2Ah/ 5.8Ah/ 6.4Ah , 110-240V Intelligent charger with US/ EU/ AU plug
PAS Torque sensor
Throttle No
Display LCD OMT-M3
Installation Widths (mm / OLD) 135mm or 142 mm
wheel size 16" - 28"
Rim Size N/A
Part Name QTY
1 36V 250W/ 350W motor ( with integrated speed sensor, 36H)  1pc
2 36V intelligent controller  ( installed in battery holder) 1pc
3 OMT-M3 LCD display 1pc
4 Down tube bottle battery ( 7 colors, 5.2Ah/ 5.8Ah/ 6.4Ah) 1pc
5 Bottle battery holder 1pc
6 110-240V Charger 1pc
7 Spoke for 20“/ 26"/ 27.5"/ 700C wheel 36pcs

About shipment ( Important! )

Please read the following terms before placing an order.

The time showed in the " Shipping Method" means the transport time, not including the handling time which takes 1-7 days usually.

Because of the Coronavirus, there are fewer transportation lines, the transportation will take more time than shown on the web, such as DHL may take 10-15 days. Please understand, and all products shipping by DHL would not include the tax ( if any).

1. Battery/ Products with battery

Handling time: 3-7 days
Thanks for purchasing our product.
The battery is a special product which needs several cycle tests before delivery, so production and test time need about 3-7 days.

Due to the express shipping regulation of express company for the risky item like the battery, we ship the battery separately from other goods and via special air method to the destination country, then to your door via UPS, FedEx, or some other express company.

Noted! Handling time of E-bike or electric bike kits please check on their product page.


Shipping time

Customs Tax

European Union

6-12 days


(Delivered Duty Paid for the following countries:

Germany, France, Belgium, Luxembourg, Netherlands,
Denmark, Italy, Czech Republic, Poland,
Austria, Spain, Ireland, Portugal, Sweden)

DDU ( Other countries in European)


 8-15 days

DDP(Delivered Duty Paid)


12-20 days

DDP(Delivered Duty Paid)


 8-15 days


Service area not included

PO BOX; affiliated islands, remote areas: 006-009;  PUERTO RICO AND VIRGIN ISLANDS; 966-969 HAWAII AND GUAM;995-999 ALASKA,  etc. Customers from these areas please contact us to confirm the cost.


10-20 days

DDU(Delivered Duty unPaid)

Service area not included:

P.O.BOX, military address, Northwest, Territories, Nunavut, Yukon, customers from these areas please contact us first to confirm the cost.

South Africa

10-15 days

DDP(Delivered Duty Paid)

Australia, New Zealand

7-15 days

DDU(Delivered Duty Unpaid)
NO tax declare value;AU < AUD1000; NZ<USD300

Malaysia, Thailand

5-7 days

DDU(Delivered Duty Unpaid)


3-5 days

DDU(Delivered Duty Unpaid)


3-5 days

DDU(Delivered Duty Unpaid)


 5-10 days

 DDP(Delivered Duty Paid)

Service area not included
Hokkaido; Okinawa; Fukushima, Radiation Control Area.

We only ship battery/ products with battery to the above countries at present. But we will try our best to add channels to more countries in the future.




2. Other products

Handling time

3-7 days

You can choose the shipping way when you checkout and see the shipping items.

 Please note: Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer's responsibility.

Usually, we will declare a reasonable minimum value to save your customs tax. But due to the different policies in different countries, the customs may ask you to pay the tax.

Ship via ChinaPost

10-30 days

Express company

5-10 days


We understand the importance of the right product and the right fit, we sincerely want you to love your items. To make a return, please follow these guidelines:


Defective item

If an item is defective when you receive it, it will need to be returned to us for a full inspection to ensure it is covered by the warranty. To return a faulty item please follow the procedure below:

To qualify for a return:

Returns will be accepted within 15 days after you receive the product. 

The item(s) must be in new with original packaging.

The damaged item even following the regular operation.

Proof of defective item required.


Items not acceptable by return:

The item was not purchased from ELECYCLES.

The item is unclean.

The item was damaged by improper use or damaged in an accident.


Once the product has been returned to us and has been ascertained as complete and undamaged (including the “original sealed” product box including its original packing materials) your purchase price, and original shipping will be refunded to you. We do not refund any applicable tax. Note that if the product is defective through no fault of your own, you may either request a repair or an exchange.


All returns:

Refunds, including original shipping, will be refunded to the credit card account/ corresponding account used for purchase within 30 days after the return is received. A refund will be applied to the original card used in the transaction.

If an item is returned that does not meet the above criteria, the return will be declined and the item returned to you.


Please noted

1. For the electric bikes or ebike kits or the electric wheelchair or the electric handcycle, shipping fees to return the items are at the customer's own expense.

2. Please consult your local post office to confirm the actual return shipping fee. We advise you use the cheapest registered airmail method that is available.


Wrong item

If we have accidentally sent you the wrong item, you do as below.

A. If the wrong item is acceptable, you could ask for a special offer for this item, the difference would be refunded to your account.

B. You could request the return. The purchase price and original shipping will be refunded.

C. Please contact us if you have any other query or request.


Unwanted item / no faulty

If you have changed your mind on your purchase, please contact us.


If you have any questions regarding your purchase or its warranty, please chat with us one line or email to

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