Surron Ultra Bee Primary Drive Pulley Kit V2 | EBG
$ 46.00 – $ 236.00Price range: $ 46.00 through $ 236.00
Upgrade the Surron Ultra Bee primary drive with EBG V2’s hybrid rear pulley, heat-treated 420J2 front pulley and 25mm carbon-reinforced belt. Built for precise belt tracking, durable tooth engagement and smooth power transfer on stock or modified Surron Ultra Bee builds.
- Model-specific fitment for Surron Ultra Bee
- Front 27T / Rear 61T pulley set
- CNC 7075-T6 aluminum and heat-treated 420J2 construction
- 25mm carbon-reinforced belt option
- Free EBG Belt Tensioning Tool included
Watch: Pulley Kit V2 Install
Step-by-step install of the EBG Primary Drive Pulley Kit V2. Use the included EBG Belt Tension Tool to set belt tension.
- Filmed step by step in the EBG workshop.
- Stuck on a step? Send us a photo of your bike and we’ll help.
Free EBG Belt Tensioning Tool Included
Every EBG V2 pulley order includes a complimentary EBG Belt Tensioning Tool at no additional cost. This purpose-designed 3D-printed setup tool helps new installers establish drive-belt tension faster and more consistently.
Quick Specs
| Bike Fitment | Surron Ultra Bee |
|---|---|
| Motor Fitment | OEM Ultra Bee motor or selected VTB Ryuga 81kW configuration |
| Tooth Count | Front: 27T / Rear: 61T |
| Pulley Configuration | Model-specific primary-drive configuration |
| Rear Pulley Hub | CNC-machined 7075-T6 aluminum |
| Rear Pulley Ring | Heat-treated 420J2 stainless steel |
| Front Pulley | Heat-treated 420J2 stainless steel |
| Drive Belt | 25mm carbon-fiber reinforced belt |
| Installation Tool | Complimentary EBG Belt Tensioning Tool included |
| Finish | Premium anodized rear hub |
| Manufacturing | Precision CNC machined |
Surron Ultra Bee Primary Drive Performance Upgrade
The heavier, higher-torque Surron Ultra Bee platform places substantial load on the primary drive during hard acceleration and off-road riding. Modified motor and controller setups can increase that load further.
The EBG V2 primary drive pulley kit combines a lightweight 7075-T6 aluminum rear hub with a heat-treated 420J2 stainless steel tooth ring. This hybrid construction reduces unnecessary rotating mass compared with an all-steel pulley while adding a wear-resistant surface where the belt contacts the pulley.
The system is designed to support stable belt tracking, smooth power transfer and consistent drivetrain response during demanding riding.
Built for Stock and Modified Surron Ultra Bee Builds
The EBG V2 kit is developed for everyday riding, off-road use and performance-modified Surron Ultra Bee builds. Its heat-treated pulley teeth help maintain consistent tooth geometry during extended operation, while the carbon-reinforced belt provides quiet, low-maintenance power transfer.
This pulley kit does not increase motor horsepower by itself. It is designed to improve primary-drive durability, belt engagement and the consistency of power transfer.
Hybrid Rear Pulley Construction
- CNC-machined 7075-T6 aluminum hub
- Heat-treated 420J2 stainless steel pulley ring
- Lightweight multi-level CNC pocketing
- Premium anodized finish
- Wear-resistant stainless steel tooth section
- High strength-to-weight ratio
The aluminum hub provides strength with reduced weight, while the heat-treated stainless steel ring handles belt contact and tooth wear.
Heat-Treated 420J2 Front Pulley
The front pulley is CNC machined from heat-treated 420J2 stainless steel. Its hardened tooth profile is designed for consistent belt engagement, improved resistance to tooth wear and stable operation under high drivetrain loads.
Carbon-Reinforced Drive Belt
The complete kit includes an EBG 25mm carbon-reinforced drive belt designed for smooth, quiet and low-maintenance power transfer on the Ultra Bee platform.
Motor Fitment
Choose OEM Motor for the original Surron Ultra Bee motor configuration, or VTB Ryuga 81kW when the bike uses the listed VTB motor option.
If you are using an aftermarket motor or are unsure which option to choose, send us a clear photo of the motor output shaft before ordering.
This product is designed for Surron Ultra Bee and is not intended for other e-bike platforms.
Selectable Configurations and Package Contents
Full Pulley Kit + 25mm Carbon Belt
- 1 × EBG hybrid rear pulley
- 1 × EBG heat-treated 420J2 stainless steel front pulley
- 1 × EBG 25mm carbon-reinforced belt
Bonus included with every configuration: 1 × complimentary EBG Belt Tensioning Tool.
Installation Notes
- Select the correct product and motor option before ordering.
- Use the included EBG Belt Tensioning Tool to establish the initial belt tension.
- Check belt alignment, tension and clearance before riding.
- Check all fasteners and belt tension again after the first 50 km.
- Professional installation is recommended if you are unfamiliar with primary-drive alignment.
Frequently Asked Questions
Is this pulley kit made specifically for Surron Ultra Bee?
Yes. Pulley geometry, shaft fitment and belt length are matched to the Surron Ultra Bee primary drive. It is not intended for other e-bike platforms.
Does this kit add horsepower?
No. The kit does not increase motor output. It is designed to improve belt engagement, drivetrain durability and the consistency of power transfer.
What is included in the kit?
The full configuration includes the front pulley, hybrid rear pulley, 25mm carbon-reinforced belt and complimentary EBG Belt Tensioning Tool.
| Weight | 0.4 kg |
|---|---|
| color | Black, Blue, Galaxy Purple, Gunmetal blue, Raw Silver, Red |
| Motor Option | Keyed Shaft – OEM Ultra Bee / EBMX / TORP / Sotion …, Splined Shaft – VTB Ryuga 81kW |
| Pulley Option | Front Pulley Only, Full Pulley Kit + 25mm Carbon Belt, Rear Pulley Only |
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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30-Day Limited Warranty
Eligible EBG-branded products are covered against confirmed manufacturing defects for 30 calendar days from the carrier-recorded delivery date. Product-specific coverage takes precedence.
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