8Inch vs 12Inch Hub Motor: A Side-by-Side Selection Guide
Wheel hub motors are a practical choice for mobility scooters, electric wheelchairs, medical carts, AGVs, and light electric vehicles because they integrate the drive motor and wheel into one unit. When a buyer needs to choose between an 8-inch and a 12-inch hub motor, the decision depends on installation space, tire type, torque-speed behavior, and brake integration. This guide uses three specific models from Wuxi Speedup Power Co., Ltd. to show how the sizes differ: the 8-inch brushless hub motor 1DY-E5S, the 12-inch brushless hub motor SA06, and the 12-inch brushed wheelchair hub motor 6DY-A4.
8-inch brushless wheel hub motor with electromagnetic brake, model 1DY-E5S.
The core decision: wheel diameter is only part of the motor spec
The first step in a hub motor selection is to match the powered wheel to the vehicle frame and duty cycle. Compact mobility products often use 8-inch wheels because the assembly occupies less space. Products that need higher ground clearance, a larger tire contact patch, or a pneumatic option may move to a 12-inch wheel. But rated speed and torque at the wheel are controlled by the motor voltage, power, and gear reduction as much as by tire size.
Designers should not select a wheel by diameter alone. If the motor speed is too low, the product may not reach the intended travel speed; if it is too high, the vehicle may need a different gear ratio or a different wheel. The loading capacity of the 8-inch model 1DY-E5S and the 12-inch model SA06 is stated as 80 to 300 kg, which indicates these motors are designed for a similar load range. The final decision needs to include speed, brake, and mounting constraints.
Industry background: powered wheel demand in mobility and medical equipment
The global market for powered mobility continues to expand. According to Grand View Research, the global brushless DC motor market was estimated at USD 20,990.5 million in 2024. Another Grand View Research report estimated the global electric wheelchair market at USD 4.49 billion in 2024 and projected growth to USD 9.05 billion by 2030. These figures explain why OEM buyers are evaluating durable wheel hub motors for wheelchairs, scooters, and medical transport equipment.
Wuxi Speedup Power Co., Ltd., established in 2018, is a DC motor manufacturer based in Wuxi, China. The company specializes in DC motors, pancake motors, BLDC motors, wheel motors, and hub motors for industrial and civil applications. Its production facility covers 10,000 square meters, with an annual production capacity of 30,000 pieces. The company reports an export ratio of 90 percent, with main markets in the EU and USA.
Detailed solution: 8-inch and 12-inch hub motors compared
8-inch brushless hub motor - model 1DY-E5S
The 1DY-E5S is an 8-inch brushless wheel hub motor fitted with a 200 mm solid tire and an electromagnetic brake. Its rated voltage is 36V, with 24V and 48V versions also available. Rated power is 300W, rated speed is 150 rpm, and rated torque is 20Nm. The reduction ratio is 1:20, and net weight is 5.5 kg. It uses an outer rotor structure and Rare Earth NdFeB permanent magnets, and it is intended for use in mobility scooters, electric scooters, wheelchair assistance, medical chairs, AGVs, and robots.
The motor is listed with CE, EMC, and RoHS certification. OEM customization options include operating voltage, custom shaft/axis size and profile, tailored performance profiles, and special OEM configurations.
12-inch brushless gear-reduced hub motor model SA06.
12-inch brushless hub motor - model SA06
The SA06 is a 12-inch brushless hub motor with gear reduction. It accepts either pneumatic/inflatable or solid tires. Its base catalog rating is 24V, 300W, 150 rpm, and 20Nm. The reduction ratio is 1:4.5, net weight is 3.5 kg, and loading capacity is 80-300 kg. The motor is protected to IP54 and uses Rare Earth NdFeB permanent magnets. Brake options are electronic brake (EABS) or disc brake.
This 12-inch brushless model is designed for mobility scooters, electric scooters, wheelchair assistance, medical chairs, AGVs, robots, and folding ebikes. It is CE, EMC, and RoHS approved, and it can be customized for voltage, shaft/axis dimensions, performance profiles, and OEM requirements.
12-inch brushed hub motor - model 6DY-A4
The 6DY-A4 is a 12-inch single-shaft wheelchair hub motor with a 305 mm solid tire. It is a brushed DC motor with an integrated electromagnetic brake. The base rated voltage is 24V, and 36V and 48V systems are also available. At 24V, the motor delivers 200W of power and a rated speed of 70 rpm. The gear reduction ratio is 1:40.
According to the product description, the motor has a built-in brake with an electromagnetic clutch and can support a manual clutch. It uses printed armature technology and Rare Earth NdFeB permanent magnets. Main materials are aluminum alloy, copper, magnet, and rubber. It is manufactured for electric wheelchair applications and is also listed for mobility scooters, electric scooters, wheelchairs, medical chairs, hospital carts, and robots.
12-inch brushed wheelchair hub motor model 6DY-A4.
Side-by-side comparison table
| Specification | 1DY-E5S 8-inch brushless | SA06 12-inch brushless | 6DY-A4 12-inch brushed |
|---|---|---|---|
| Tire/diameter | 200 mm (8-inch) solid tire | 12-inch pneumatic or solid tire | 305 mm (12-inch) solid tire |
| Motor technology | Brushless DC, outer rotor | Brushless DC, outer rotor | Brushed DC with printed armature |
| Rated voltage | 36V (24/48V options) | 24V (36/48V options) | 24V (36/48V options) |
| Rated power | 300W | 300W | 200W |
| Rated speed | 150 rpm | 150 rpm or customized | 70 rpm |
| Rated torque | 20Nm | 20Nm | Not stated |
| Reduction ratio | 1:20 | 1:4.5 | 1:40 |
| Brake type | Electromagnetic brake | Electronic brake (EABS) or disc brake | Electromagnetic brake with electromagnetic clutch and manual clutch support |
| Net weight | 5.5 kg | 3.5 kg | Not stated |
| Loading capacity | 80-300 kg | 80-300 kg | Not stated |
| Waterproof rating | Not stated | IP54 | Not stated |
| Certifications | CE, EMC, RoHS | CE, EMC, RoHS | CE, EMC, RoHS |
Step-by-step selection workflow
- Confirm the load and operating profile. Check total vehicle weight, passenger weight, terrain, and daily run time. The 8-inch 1DY-E5S and the 12-inch SA06 record loading capacity of 80-300 kg, so load alone may not separate them.
- Determine wheel diameter and tire type. If the product needs a compact chassis and a solid tire can meet the ride requirement, the 8-inch 1DY-E5S is a candidate. If a 12-inch pneumatic tire or a larger footprint is preferred, evaluate the 12-inch SA06. For a 12-inch solid-tire wheelchair drive, evaluate the 6DY-A4.
- Match the speed class. The brushless 1DY-E5S and SA06 are catalogued at 150 rpm. The brushed 6DY-A4 is catalogued at 70 rpm at 24V. Choose a speed class that supports the intended travel speed and acceleration of the device.
- Choose the braking method. Electromagnetic brakes hold the wheel when power is off and are used on the 1DY-E5S and 6DY-A4. Electronic brake or disc brake is available on the SA06. Wheelchair and medical applications often need fail-safe holding, so brake type should be reviewed with the system integrator.
- Verify the electrical system. 1DY-E5S uses 36V as its base rating, while SA06 and 6DY-A4 use 24V as their base rating. All three list 36V or 48V as availability options, so confirm with the motor supplier before controller selection.
- Check certifications and OEM options. The three models are listed with CE, EMC, and RoHS certification. Custom made and OEM production types are available, including custom shaft/axis sizes and tailored performance profiles.
- Request a sample or technical review. A physical sample and motor controller check help confirm acceleration, braking, and mounting compatibility before mass production.
Use cases and application fit
Electric wheelchair wheel motor application.
Compact scooters and service robots
The 8-inch 1DY-E5S can be a fit for compact mobility scooters, electric scooters, wheelchair assistance devices, medical chairs, AGVs, and robots. Its 200 mm solid tire and integrated electromagnetic brake help simplify the wheel assembly. Since it is brushless, the motor is designed to run smoothly and quietly.
Outdoor mobility scooters and folding ebikes
The 12-inch SA06 is useful when a product can accept a larger wheel and when designers want the option of a pneumatic or solid tire. The IP54 rating provides extra environmental protection, and the 150 rpm rating makes it suitable for low-to-medium speed mobility products. Catalog applications include mobility scooters, electric scooters, wheelchair assistance, medical chairs, AGVs, robots, and folding ebikes.
Electric wheelchairs and hospital carts
The 12-inch 6DY-A4 is positioned for electric wheelchair manufacturing and is also listed for wheelchairs, mobility scooters, medical chairs, hospital carts, and robots. Its 70 rpm rating and 1:40 reduction provide a lower-speed drive profile. The built-in electromagnetic brake with electromagnetic clutch and manual clutch support addresses holding and maneuvering requirements.
FAQ: 8-inch vs 12-inch hub motor selection
How do I decide between an 8-inch and a 12-inch hub motor for a mobility or medical device?
Confirm the installation space, tire requirement, speed target, and brake method. The 1DY-E5S is an 8-inch brushless motor with a 200 mm solid tire and electromagnetic brake, rated at 36V, 300W, 150 rpm, and 20Nm. The SA06 is a 12-inch brushless motor with pneumatic or solid tire options, rated at 24V, 300W, 150 rpm, and 20Nm, with IP54 protection. The 6DY-A4 is a 12-inch brushed motor with a 305 mm solid tire, rated at 24V, 200W, and 70 rpm, with a 1:40 reduction. Choose based on chassis size, required wheel speed, and brake behavior.
Can the 12-inch brushless motor SA06 use pneumatic tires, or only solid tires?
The SA06 is described as accepting both pneumatic/inflatable and solid tires. The 6DY-A4 is specified with a 305 mm solid tire. If your product depends on a pneumatic tire for ride comfort or traction, the SA06 is the model to review.
What are the available voltage ratings for these hub motors?
The 1DY-E5S is rated at 36V, with 24V and 48V versions available. The SA06 lists 24V as its catalog rating, and 36V and 48V versions are also available. The 6DY-A4 also lists 24V as its base rating, with 36V and 48V options available. Final operating voltage should be confirmed with the motor manufacturer before controller integration.
What certifications do these wheel hub motors carry?
The product data for the 1DY-E5S, SA06, and 6DY-A4 lists CE, EMC, and RoHS certification. Buyers should still request current certificate copies during supplier qualification because certifications are part of the purchasing review.
What should I check with a DC motor manufacturer before sourcing a hub motor?
For an OEM project, verify rated voltage, rated power, output speed, torque, gear reduction, brake type, tire type, loading information, and shaft customization. Ask whether samples and motor-controller matching support are available. Wuxi Speedup Power Co., Ltd. lists custom made and OEM production types for these products. You can contact May Hoo at speedupmotor@outlook.com or WhatsApp +86-18151710527 for application review.
Conclusion
Choosing between an 8-inch and a 12-inch hub motor should be a product-level decision, not a standalone specification. The 8-inch 1DY-E5S offers a compact 200 mm solid-tire design with a 150 rpm brushless profile. The 12-inch SA06 adds a larger wheel diameter, pneumatic/solid tire flexibility, and IP54 protection while retaining a 150 rpm brushless profile. The 12-inch 6DY-A4 moves to a brushed DC platform with 70 rpm output and a 1:40 reduction, making it useful for lower-speed wheelchair and medical transport applications.
For OEM buyers, the next step is to compare the selected motor with the vehicle controller, battery voltage, wheel mounting, and safety brake requirement. Wuxi Speedup Power Co., Ltd. can provide technical review, custom shaft options, and prototype support. Download the company brochure for a broader product overview, or contact May Hoo by email or WhatsApp to request a sample and quotation.
Wuxi Speedup Power warehouse and production support.
Need help choosing a hub motor for a mobility or medical project? Email speedupmotor@outlook.com or contact May Hoo by WhatsApp at +86-18151710527.