EBG Primary Drive Pulley Kit V2
Primary Drive Pulley Kit for SurRon Ultra Bee
The EBG Primary Drive Pulley Kit V2 is a complete primary belt drive upgrade designed for the SurRon Ultra Bee. The kit combines a CNC-machined 7075-T6 aluminum rear pulley hub, a high-hardness heat-treated 420J2 stainless steel rear pulley ring, a CNC-machined stainless steel front pulley, and an EBG carbon fiber reinforced drive belt.
The hybrid pulley construction reduces rotating mass while maintaining high structural rigidity and wear resistance. Precision CNC machining and controlled manufacturing tolerances ensure accurate belt alignment, consistent tooth engagement, and reliable operation under high-load riding conditions.
Package Includes
- 1 × EBG CNC Hybrid Rear Pulley
- 1 × EBG CNC Stainless Steel Front Pulley
- 1 × EBG Carbon Fiber Reinforced Belt (25 mm)
Outstanding Features
Hybrid 2-Piece Rear Pulley
The rear pulley utilizes a two-piece hybrid construction consisting of a CNC-machined 7075-T6 aluminum hub and a high-hardness heat-treated 420J2 stainless steel pulley ring.
The lightweight aluminum hub reduces rotational inertia, while the hardened stainless steel tooth profile improves wear resistance and maintains tooth geometry during extended operation.
Features:
- Hybrid 2-piece pulley construction
- CNC-machined 7075-T6 aluminum hub
- Heat-treated 420J2 stainless steel pulley ring
- Reduced rotating mass
- High strength-to-weight ratio
- Improved wear resistance
- Long service life
CNC 7075-T6 Billet Aluminum Hub
The rear pulley hub is CNC machined from aerospace-grade 7075-T6 billet aluminum and extensively pocketed to reduce weight without compromising strength.
Its aggressive multi-level machining creates a distinctive three-dimensional appearance while minimizing rotational mass for improved drivetrain response and efficiency.
Finished with a premium anodized coating for enhanced corrosion resistance and long-lasting appearance.
Features:
- CNC Billet 7075-T6 Aluminum
- Aggressive Lightweight Pocketing
- High Strength-to-Weight Ratio
- Multi-Level CNC Machining
- Premium Anodized Finish
CNC Stainless Steel Front Pulley & Rear Pulley Ring
The front pulley is CNC machined from heat-treated 420J2 stainless steel to provide improved wear resistance compared to conventional aluminum pulleys.
The hardened tooth profile maintains accurate belt engagement and minimizes tooth wear during continuous operation.
Features:
- CNC-machined 420J2 stainless steel
- Heat-treated for increased surface hardness
- High wear resistance
- Corrosion resistant
- Long service life
Advantages:
- High-hardness heat-treated 420J2 stainless steel
- Exceptional wear resistance
- Superior durability
- High load capacity
- Corrosion resistant construction
- Extended service life
EBG Carbon Fiber Reinforced Belt
The kit includes EBG’s premium carbon fiber reinforced drive belt, available in a 25 mm width.
Designed for smooth and efficient power transfer, the belt delivers exceptional tensile strength while reducing drivetrain noise and maintenance requirements compared to traditional chain systems.
Available Options:
- 25 mm Carbon Fiber Reinforced Belt
Benefits:
- High tensile strength
- Smooth and quiet operation
- Excellent flexibility
- Long service life
- Low maintenance
Precision CNC Manufacturing
Every component is precision CNC machined to tight tolerances, ensuring perfect alignment, consistent belt engagement, and maximum drivetrain efficiency.
The combination of lightweight 7075-T6 aluminum, high-hardness heat-treated 420J2 stainless steel, and carbon fiber reinforcement creates a premium primary drive system engineered for both everyday riding and high-performance applications.
Technical Specifications
| Component | Material |
|---|---|
| Rear Pulley Hub | CNC Billet 7075-T6 Aluminum |
| Rear Pulley Ring | High-Hardness Heat-Treated 420J2 Stainless Steel |
| Front Pulley | High-Hardness Heat-Treated 420J2 Stainless Steel |
| Drive Belt | Carbon Fiber Reinforced |
| Belt Width | 25 mm |
| Finish | Premium Anodized (Hub) |
| Manufacturing | Precision CNC Machined |
Compatibility
- SurRon Ultra Bee
Why Choose EBG V2?
- ✔ Complete primary belt drive upgrade kit
- ✔ Advanced hybrid 2-piece rear pulley design
- ✔ Aerospace-grade 7075-T6 billet aluminum hub
- ✔ High-hardness heat-treated 420J2 stainless steel front pulley and rear pulley ring
- ✔ Carbon fiber reinforced drive belt
- ✔ Reduced rotating mass for improved drivetrain response
- ✔ Exceptional wear resistance and extended service life
- ✔ Premium multi-level CNC machining
- ✔ Smooth and efficient power transfer
- ✔ Precision engineered by EBG
Installation Notes
- Direct replacement for the OEM primary drive system.
- Verify proper belt alignment and tension before riding.
- Inspect all fasteners after the first 50 km.
- Periodically inspect the belt and pulley teeth for wear.
| Weight | 0.4 kg |
|---|---|
| Option EBG Pulley CNC | EBG CNC Primary Drive Front & Rear Pulley + EBG Carbon Drive Belt 25mm |
| Motor Option | OEM Motor, VTB Ryuga 81kW |
| color | Black, Blue, Galaxy Purple, Gunmetal blue, Raw Silver, Red |
Shipping Policy
Processing Time
Within 1-2 business days after an order is placed, the item will be handed over to the carrier, and the shipping label will be created. Once your package has been picked up by the carrier, you can track its delivery using the following link: https://www.17track.net/en. Please note that orders will not be processed on weekends or public holidays.
Delivery Time
Our goal is to process and ship your orders efficiently. All products are shipped from Vietnam. Depending on the destination and transportation method, delivery times are as follows:
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United States, Canada, Europe (Standard Shipping): 3-5 business days.
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Other Regions (Standard Shipping): 7-10 business days.
Delivery times may vary due to factors beyond our control, such as customs delays or force majeure.
Order Tracking
An email with tracking details will be sent once your item is dispatched. This will allow you to follow your package’s journey. If you do not receive this email or need additional shipping information, please contact us at ebgvietnam@gmail.com.
Contact Information
For any inquiries, please reach out to us at:
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Address: 225 Nguyen Tieu La Street, Ward 8, District 10, Ho Chi Minh City, VietNam.
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Mobile: +84979681368 (WhatsApp, Telegram)
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Email: ebgvietnam@gmail.com
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Website: https://ebikegarage.shop/
Note
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Pre-order and customized products are excluded from the standard processing and delivery times. The expected delivery date will be stated in the product description or confirmed during order placement.
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Ebike Garage is not responsible for any damage, loss, or theft of goods caused by third-party carriers after the package has been dispatched.
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We are unable to ship to P.O. boxes, APO/FPO addresses, or locations in Puerto Rico and Alaska.
Shipping Policy for Bulk Orders (Dealership)
For bulk orders, we recommend the following:
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Use your own preferred logistics provider to ensure safe delivery.
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Alternatively, you may pick up the goods from our warehouse in Vietnam.
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If neither option is available, we will arrange shipment with a third-party carrier. However, Ebike Garage will not be liable for any damage, loss, or theft caused by third-party carriers once the goods leave our warehouse.
Third-Party Shipping Processing Time
Spot goods will be handed to the carrier within 1-2 business days of order placement. The carrier will process packages within 2 business days of pick-up. Tracking information will be available through: https://www.17track.net/en.
Delivery Areas and Estimated Shipping Time
| Shipping Method | Region | Estimated Delivery Time (Business Days) |
|---|---|---|
| Standard Shipping (UPS, FedEx, DHL) | United States, Canada, France, Germany, UK, Italy, Australia, New Zealand, etc. | 3-5 |
| Brazil, Chile, Russia, South Africa | 7-10 | |
| UAE, Kuwait, Saudi Arabia, Lebanon | 7-10 | |
| All Other Countries | 7-10 |
Address Accuracy
Please ensure that your shipping address is accurate when placing an order. Incorrect addresses may delay or prevent delivery.
Shipping Costs
We offer door-to-door delivery services using local carriers such as UPS, FedEx, or DHL. Shipping costs will be calculated at checkout based on your location and the size of your order.
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