About The Product
- Replacement/upgrade crankset spiders for use with Bosch Gen 4 E-bikes
Full Speed Ahead (FSA) Bosch Gen 4 Spider - BCD 104, 50mm Chainline, Black
Upgrade your e-bike's drivetrain with the FSA Bosch Gen 4 Spider, engineered for optimal performance, durability, and sleek style. Crafted from premium alloy, this high-performance spider is compatible with Bosch Gen 4 systems, ensuring seamless integration and reliable power transfer.
Materials & Construction:
Constructed from lightweight yet robust aluminum alloy, the FSA Spider offers exceptional stiffness and durability to withstand the rigors of off-road adventures and daily commuting. Its black anodized finish not only adds a sleek, modern look but also provides corrosion resistance for long-lasting performance in diverse weather conditions.
Performance & Engineering:
Designed specifically for e-bikes, this spider features a precise 50mm chainline to enhance drivetrain efficiency and smooth gear shifting. It expertly balances weight savings with structural integrity, ensuring your e-bike maintains optimal power delivery and responsiveness during intense rides.
Components & Technology:
Compatible with Bosch Gen 4 drive units, the FSA Spider incorporates advanced engineering principles to improve pedal efficiency and reduce drivetrain noise. Its standardized BCD 104mm bolt pattern ensures easy installation and compatibility with a wide range of chainrings, allowing for customizable gearing setups.
Style & Use Case:
This black alloy spider complements the modern aesthetic of any e-bike, whether you're tackling mountain trails, urban commutes, or long-distance touring. Its durable construction and precision engineering make it the perfect choice for riders seeking reliable performance and a sleek appearance.
Innovative Features:
- Designed explicitly for Bosch Gen 4 e-bike systems
- 50mm chainline optimized for efficient power transfer
- Robust alloy construction with corrosion-resistant finish
- BCD 104mm compatibility for versatile chainring options
- Engineered to withstand the demanding conditions of e-bike riding
Upgrade your e-bike's drivetrain with confidence - the FSA Bosch Gen 4 Spider is built to deliver enhanced performance, longevity, and style. Whether upgrading an existing setup or building a new bike, this premium component is your ideal choice for a reliable, high-performing e-mountain bike or urban e-bike.
- Maximize your e-bike's performance with the Full Speed Ahead Bosch Gen 4 Spider featuring a 50mm chainline, optimized for efficient power transfer and smooth riding.
- Constructed from high-grade alloy, this FSA spider offers exceptional durability and lightweight performance, reducing overall bike weight without sacrificing strength-ideal for aggressive e-bike rides and long-distance commuting.
- Engineered specifically for Bosch Gen 4 motors, the BCD104 bolt pattern ensures universal compatibility with a wide range of chainring options, allowing for personalized gearing setups and upgrading flexibility.
- Designed in a sleek black finish, this spider provides a professional, modern aesthetic that seamlessly integrates with your e-bike's styling while resisting corrosion and wear for long-lasting use.
- Featuring advanced manufacturing and precision-engineered components, this FSA alloy spider delivers enhanced stiffness and reliability under demanding riding conditions, making it a key upgrade for serious e-bike enthusiasts.
| Specification | Value |
|---|---|
| Manufacturer | FULL SPEED AHEAD |
| Manufacturer Part No. | 38000373000050 |
| Universal Product Code | 840031062567 |
| Invoice Description | CHAINRING SPIDER FSA EBIKE BOSCH GEN4 104 1X BK |
| Shipping Weight | 0.26 lbs. |
| Package Dimensions | 8.9 x 7.4 x 0.3 |
| Country of Origin | TAIWAN |
| Mount Compatibility | 104mm 4-Bolt |
| Type | 1x |
| Material | Alloy |
| Color | Black |
- Supplier:
- JBI
Bike Junkies offers no‑hassle returns and exchanges within 60 days of delivery. We want every customer to feel confident when shopping with us, and our return process is designed to be simple, fair, and fast.
Return Eligibility
To qualify for a return or exchange, the following conditions must be met:
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The item must be in new, unused, and uninstalled condition.
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All original packaging, tags, hardware, and accessories must be included and intact.
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Items showing wear, installation marks, damage, or improper use cannot be accepted.
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An order number is required.
Once your return is received at our warehouse, a refund will be issued within 5 days after inspection.
Refunds
Refunds are issued to the original form of payment once the returned item has been received and approved. If we are unable to refund to the original payment method, the refund will be issued as store credit.
Depending on your bank or credit card provider, it may take an additional 2–3 business days for the refund to appear in your account.
Exchanges
To make an exchange, simply complete the return process and then place a new order for the item you want instead. This ensures the replacement item is reserved and ships quickly.
How to Start a Return
To request a Return Authorization (RA#), contact us at support@bikejunkies.com. Please include your order number and the item you wish to return.
Once approved:
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You will receive a Return Authorization email with instructions.
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Print the prepaid label provided by us. ($9.99 will be deducted from your refund)
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Ship the item back within 7 days of the RA being issued as RA #'s are only valid for 7 days.
Please do not tape anything to the original product packaging. Place the item inside a proper shipping box. Using the manufacturer’s box as the shipping container will result in damage and the return may be rejected.
Be sure to keep your return tracking number. Powersport Junkies is not responsible for lost return shipments. You will receive a confirmation email once your return has been processed and refunded.
Defective, Incorrect, or Damaged Items
If you receive a defective, damaged, or incorrectly shipped item, contact us immediately. We will cover the return shipping cost and ensure the issue is resolved quickly.
Non‑Returnable Items
Certain items cannot be returned, including:
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Electronics with opened packaging or broken manufacturer seals
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Any part that has been installed or shows installation attempts
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Tools or chemicals that have been opened or unsealed
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Open‑box items with destroyed or missing packaging
Our Info
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Storefront name: Bike Junkies
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Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
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Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
This Shipping Policy explains how orders are processed, handled, and delivered by Bike Junkies, including delivery timelines, shipping coverage, and special conditions for military addresses. It is designed to give customers a clear understanding of what to expect when placing an order.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Order Processing and Handling
Orders are processed quickly to ensure fast delivery. Our standard handling time is 0–1 business days. Order cutoff time is 12 PM PST Monday-Friday and orders placed after that will be shipped shipped next business day.
Transit Times
Once shipped, orders typically arrive within 2–3 business days. Transit times may vary slightly depending on the destination, weather conditions, or carrier-related delays. Delivery estimates apply only after the order has left our facility.
Delivery Schedule
Standard delivery occurs Monday through Friday. Saturday delivery may be available.
Shipping Coverage
Bike Junkies offers free shipping to the lower 48 states of the United States. We do not ship to the following locations:
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Alaska
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Hawaii
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Puerto Rico
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Any international destination outside the United States
Orders placed with shipping addresses in restricted locations will be canceled and refunded.
Military Shipping (APO/FPO)
Bike Junkies ships to APO/FPO military addresses using USPS only.
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We cannot ship hazardous materials or oversized items to military addresses due to carrier and military mail restrictions.
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Transit times to APO/FPO locations may vary significantly depending on military mail processing.
Address Accuracy and Delivery Issues
Customers are responsible for ensuring that all shipping information provided at checkout is accurate and complete. Bike Junkies is not responsible for delays, lost packages, or delivery failures caused by incorrect or incomplete addresses. If a package is returned due to an address error, additional shipping charges may apply to resend the order.
Lost, Delayed, or Damaged Shipments
If a shipment is delayed, lost, or arrives damaged, customers should contact us promptly so we can assist with initiating a claim or resolving the issue with the carrier. While we support the process, final decisions regarding claims are made by the carrier.
Tracking Information
A tracking number is provided via email once the shipping label has been created. Tracking updates may take up to 24 hours to appear after the label is generated.
Shipping Restrictions
Certain items may be subject to shipping restrictions due to size, weight, or hazardous material regulations. If an order cannot be shipped due to such restrictions, we will notify the customer to arrange an alternative solution.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
For warranty issues please contact us at support@bikejunkies.com. Each Brand is different and we can provide instruction to complete warranty issues.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
