Ebike Solution
QSMOTOR 138 4000W Air Cooled Mid Drive Motor With Spline Shaft
QSMOTOR 138 4000W Air Cooled Mid Drive Motor With Spline Shaft
Low stock: 3 left
Couldn't load pickup availability
QS138 4000W Mid Drive Motor With Spline Shaft
UK Stock Fast Delivery
Feature
- Light weight and small dimension compare to hub motor
- High performance benefit from flux weakening
- High efficiency during climbing, and better acceleration
- Support regenerative braking
Product details:
- Motor Type: BLDC Inner rotor motor
- Brand: QS Motor
- Magnet Height: 90mm 5 pole pairs
- Rated Power: 7500W
- Speed: 4000RPM
- Max Torque: 72 N.m
- Cooling Method: Air cooling
- Working Temperature:70-120°C Peak 150°C
- Phase Wire: 20mm²
- Colour: Black
- Net Weight: 13kg
- Package Dimensions: 34cm*34cm*34cm
Package Included
- 1 X QS 138 4kW Air Cooled Mid drive motor with spline shaft
- 1 X 428 14T sprocket
Shipping information: We offer free shipping and we dispatch same or next day Monday to Friday.
Guarantee: Offer a money-back guarantee or warranty to give the customer peace of mind when making a purchase.
Feedback:Your satisfaction and positive feedback is very important for us, if you have any problems, don't hesitate to contact us. We'll do our best to serve you.
More info
More info
Shipping information: We offer free shipping on most of our items,dispatched same day Monday to Friday before 4 PM.We can offer next day delivery on some of our items depending on availability and shipping address.
Guarantee: Offer a money-back guarantee or warranty to give the customer peace of mind when making a purchase.
Feedback: Your satisfaction and positive feedback is very important for us, if you have any problems, don't hesitate to contact us. We'll do our best to serve you.
Shipping & Returns
Shipping & Returns
Shipping Information
At Ebike Solution, we aim to deliver your orders quickly and reliably.
- Free UK Shipping on all orders.
- Free next day delivery on orders above £50 (based on availability)
- A tracking number is provided for most items once dispatched.
- Local Collection Available – based in Essex. Please contact us in advance to arrange collection.
International Shipping
- Delivery Time: 7–14 business days (varies by country)
- Customs & Duties Buyer: Paid at the checkout (buyer is responsible for any import fees applicable)
- We currently ship to the EU, and selected worldwide destinations. For specific questions, please at info@ebikesolution.co.uk .
Return Policy
We want you to be fully satisfied with your purchase. If for any reason you are not, we offer a 30-day return policy.
- You have 30 days from the date of delivery to request a return.
- Items must be returned in the same condition as received: unused, unworn, with tags, and in the original packaging.
- To start a return, please email us at info@ebikesolution.co.uk.
- Items sent back to us without prior approval will not be accepted.
- Return cost is flat 3£ on all UK orders.
For any questions regarding returns, you can always contact us at info@ebikesolution.co.uk
Share













Free UK Shipping

Secure Payments

Easy Returns
- Choosing a selection results in a full page refresh.
- Opens in a new window.