FSA Bosch Gen4 Alloy Spider CL50 W0151
EAN: 4710243887394
Part number: 38000446000050
Model: W0151
Type: E-bike chainring spider
The FSA Bosch Gen4 Alloy Spider W0151 is a forged AL6061 aluminum chainring spider designed for Bosch Gen4 e-bike drive systems. It provides a lightweight and rigid interface between the motor and chainring, ensuring efficient power transfer and long-term durability.
Key features
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Designed for Bosch Gen4 e-bike motor systems
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Forged AL6061 aluminum construction
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Lightweight and highly durable design
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Compatible with 104 mm BCD chainrings
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Optimized 50 mm chainline (CL50)
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12.2 mm offset
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Bead-blasted anodized black finish
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Designed for 1x drivetrain configurations
Technical specifications
| Specification | Details |
|---|
| Brand | FSA |
| Part number | 38000446000050 |
| Model | W0151 |
| EAN | 4710243887394 |
| Type | Chainring spider |
| Material | Forged AL6061 aluminum |
| BCD | 104 mm |
| Chainline | 50 mm |
| Offset | 12.2 mm |
| Drivetrain | 1x |
| Motor compatibility | Bosch Gen4 |
| Color | Black |
| Weight | 61.5 g |
Compatibility
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Bosch Gen4 drive units
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104 mm BCD chainrings
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Shimano and SRAM 1x12 chainrings using the 104 mm mounting standard
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E-bike drivetrain systems
In practice
The W0151 spider is an excellent choice for Bosch Gen4-powered e-bikes where low weight, stiffness, and drivetrain efficiency are important. Its forged aluminum construction delivers reliable performance under high loads, while the 50 mm chainline and 12.2 mm offset help optimize chain alignment for smooth operation and reduced drivetrain wear.
