EBG Pulley & 25mm Carbon Belt Kit for Surron Ultra Bee – The Ultimate Drivetrain Upgrade
Upgrade your Surron (Sur-Ron) Ultra Bee drivetrain with the EBG CNC Primary Drive Pulley & Carbon Belt Kit (25mm belt width, stock width 16mm), a precision-engineered system combining a 304 stainless steel front pulley, a 7075-T6 aluminum rear pulley and a high-performance carbon fiber belt. Now available in two versions: Standard for the stock Ultra Bee motor, and Ventus Ryuga with a splined-shaft front pulley for bikes running the Ventus Ryuga 81kW motor.
✅ BIKE FITMENT
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Surron Ultra Bee – Standard version
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Bikes running the Ventus Ryuga 81kW motor (splined shaft) – Ventus Ryuga version
Does not fit: The Standard version does not fit the Ryuga 81kW motor's splined shaft, and the Ventus Ryuga version does not fit the stock Ultra Bee motor. Choose the version that matches your motor.
Available in Black or Gold.
Standard
Best for: Surron Ultra Bee riders on the stock motor or other standard motors.
What's Included: Front pulley (CNC 304 stainless steel), rear pulley (CNC 7075-T6 aluminum, anodized) and EBG 25mm carbon fiber drive belt.
Not included: Mounting hardware (reuse your stock Ultra Bee hardware).
Ventus Ryuga
Best for: Bikes running the Ventus Ryuga 81kW motor with the splined output shaft.
What's Included: Splined-shaft front pulley, rear pulley (CNC 7075-T6 aluminum, anodized) and EBG 25mm carbon fiber drive belt.
Not included: Mounting hardware.
Outstanding Features
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304 Stainless Steel Front Pulley
Superior strength and corrosion resistance, engineered to handle mud, water and heavy loads in off-road conditions.
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7075-T6 Aluminum Rear Pulley
Aerospace-grade lightweight alloy with anodized coating for maximum durability and reduced weight.
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High-Performance Carbon Belt – 25mm width (stock width 16mm)
Carbon fiber composite with high tensile strength, designed to resist stretching, wear and heat under extreme riding conditions.
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Precision CNC Design
Ensures accurate alignment, smooth engagement and minimal friction for quiet, efficient performance.
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Enhanced Durability & Efficiency
Optimized tooth profile increases power transfer, reduces belt slippage and extends drivetrain lifespan.
Technical Specifications
| Component |
Specification |
| Front Pulley |
CNC-machined 304 Stainless Steel (Standard); splined shaft (Ventus Ryuga) |
| Rear Pulley |
CNC-machined 7075-T6 Aluminum (Anodized Finish) |
| Belt |
Carbon Fiber Composite – 25mm Width (High Tensile Strength, Wear Resistant) |
| Compatibility |
Surron Ultra Bee (Standard); Ventus Ryuga 81kW motor (Ventus Ryuga) |
Installation Notes
- Standard version: direct fitment using your stock Ultra Bee hardware (no hardware included).
- Ventus Ryuga version: the front pulley slides onto the Ryuga 81kW motor's splined shaft.
- Ensure correct belt tension for optimal performance and lifespan.
FAQ
Q: What bikes does this EBG pulley kit fit?
A: The Standard version fits the Surron Ultra Bee. The Ventus Ryuga version fits bikes running the Ventus Ryuga 81kW motor with the splined shaft.
Q: Which version do I need?
A: Choose Standard if you're on the stock Ultra Bee motor. Choose Ventus Ryuga if your bike has the Ryuga 81kW motor, since its front pulley is splined to match that motor's shaft.
Q: What comes in the kit?
A: A front pulley, a CNC 7075-T6 aluminum rear pulley and an EBG 25mm carbon fiber drive belt.
Q: How wide is the belt compared to stock?
A: The EBG carbon belt is 25mm wide. The stock Ultra Bee belt is 16mm.
Q: What colors are available?
A: Black or Gold, in both versions.
Q: Is mounting hardware included?
A: No. Set the correct belt tension for the best performance and belt life.
