About The Product
- 104mm/4B alloy chainrings for double cranksets
- Compatible with Shimano and Sram 104mm 4-bolt 10sp cranks
- Ramped and pinned for specific chainring combinations for precise and reliable shifting - see spec column for details
Upgrade your mountain biking performance with the FSA MTB Pro Double Chainring 38t 104 BCD 4-Bolt Aluminum D10 Black, engineered for precision, durability, and seamless shifting on rugged terrain. This high-performance chainring is an essential component for serious MTB riders seeking reliable drivetrain efficiency and a sleek, tactical look.
Materials & Construction:
Made from premium CNC-machined AL7075/T6 aerospace-grade aluminum, the FSA MTB Pro chainring combines lightweight strength with exceptional durability. Its 12mm thick construction ensures optimal stiffness and resistance against impacts and wear, making it a reliable choice for demanding trail riding and aggressive mountain biking.
Performance & Engineering:
Designed with advanced shifting ramps and stainless steel pins, this chainring delivers flawless, crisp gear shifts, minimizing chain slip and improving ride quality across varied inclines and technical sections. Compatible with 10-speed SRAM and Shimano drivetrains, it ensures smooth compatibility and effortless operation, although ideal fitment is guaranteed only on FSA MTB cranksets for maximum performance.
Components & Technology:
The precision CNC machining process guarantees precise tooth profiles and consistent quality, enabling quick, accurate shifts every time. The 38-tooth outer ring features a 104mm BCD (Bolt Circle Diameter) with a 4-bolt mounting pattern, allowing easy installation on compatible cranksets and enabling riders to customize their gear ratios for optimal climbing or speed.
Style & Use Case:
Finished in sleek black, the FSA MTB Pro chainring offers a professional, aggressive aesthetic that complements any mountain bike setup. Perfect for trail riders, enduro enthusiasts, or downhill racers, this component enhances your drivetrain's performance while maintaining a minimalist, high-tech look designed to withstand the rigors of aggressive MTB riding.
Innovative Features & Unique Selling Points:
- Co-engineered for flawless compatibility with 10-speed SRAM/Shimano systems
- CNC-machined from durable AL7075/T6 alloy for strength-to-weight ratio
- Designed with shifting ramps and stainless pins for superior shifting performance
- 12mm thick alloy provides added stiffness and impact resistance
- Optimized for aggressive trail riding, enduro, and cross-country applications
Enhance your mountain bike's drivetrain with the FSA MTB Pro Double Chainring-where precision engineering meets durable performance for serious off-road riders seeking maximum reliability and style.
- Enhanced performance and durability with precision CNC machined AL7075/T6 aluminum alloy construction for lightweight strength and longevity.
- Designed specifically for 10-speed SRAM and Shimano mountain bike drivetrains, ensuring seamless gear shifts and optimal compatibility on FSA MTB cranksets.
- Features advanced shifting ramps and stainless steel pins that improve responsiveness, reduce chain slipping, and provide crisp, reliable shifting performance across rugged terrains.
- Optimized for aggressive mountain biking with a 38-tooth outer ring and 104mm bolt circle diameter (BCD), making it the ideal choice for demanding trail riders seeking precise power transfer and efficient pedaling.
- Sleek black anodized finish offers a stylish look while resisting scratches and corrosion, perfect for aggressive trail riding, enduro, and all-mountain adventures.
| Specification | Value |
|---|---|
| Manufacturer | FULL SPEED AHEAD |
| Manufacturer Part No. | 380-0638B |
| Universal Product Code | 400310055835 |
| Invoice Description | CHAINRING FSA MTB ALY 104mm 38T 4B WB265 2x10s BK |
| Shipping Weight | 0.20 lbs. |
| Package Dimensions | 6.65 x 6.65 x 0.65 |
| Country of Origin | TAIWAN |
| Mount Compatibility | 104mm 4-bolt |
| Teeth | 38T |
| Material | Alloy |
| Spec | 38/24 |
| Color | Black |
| Chain Compatibility | 10sp |
| Tooth Type | Standard |
- Supplier:
- JBI
- Color:
- Black
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
