About The Product
- The KFX Stem is 3D forged and CNC-machined from AL2014 alloy that is then combined with a carbon structure using FSA CSI (Carbon Structural Integration) technology
- CSI is a process that permanently bonds carbon to alloy to create a true hybrid product, with many of the benefits of aluminum and carbon
- Titanium hardware
Upgrade your mountain biking setup with the Full Speed Ahead KFX ST Stem 31.8mm 80mm -12 in sleek black aluminum and carbon construction. Engineered for cross-country and trail riders demanding superior responsiveness and lightweight performance, this high-end MTB stem combines cutting-edge materials, innovative design, and precision CNC-machined components to enhance your bike's handling and style.
Materials & Construction:
Built from premium AL2014 aluminum alloy with integrated carbon reinforcement, the FSA KFX Stem provides an optimal balance of strength, lightness, and durability. Its CNC-machined alloy body ensures precise manufacturing standards, resulting in exceptional stiffness and resilience on rugged terrains.
Performance & Engineering:
Designed for aggressive trail riding and competitive cross-country racing, the 80mm length paired with a -12 angle delivers an aggressive yet comfortable riding position. The high-stiffness construction minimizes flex, translating rider input into immediate steering response - ideal for technical climbs, fast descents, and sharp cornering.
Components & Technology:
Featuring a 31.8mm clamp diameter compatible with modern mountain bike handlebars, this stem incorporates advanced CNC machining techniques for superior fit and finish. The robust construction supports high-performance components, ensuring reliable handling over rough terrain.
Style & Use Case:
With its sleek black finish and minimalist profile, the FSA KFX ST Stem combines aesthetic appeal with functional excellence. Perfect for trail, cross-country, and all-mountain riders seeking a lightweight, responsive cockpit upgrade. Its versatile design makes it an essential component for riders aiming for precision control and a race-ready stance.
Innovative & Differentiating Features:
- CNC-machined AL2014 alloy body with carbon reinforcements for enhanced strength-to-weight ratio
- Aggressive -12 rise enables an aerodynamic, race-oriented position
- 80mm length designed for balanced handling and control
- Lightweight yet durable construction for demanding mountain rides
Specifications:
- Material: AL2014 aluminum alloy with carbon reinforcement
- Ideal for Road and Mountain Bike applications
- Handlebar Clamp: 31.8mm
- Fork Diameter: 1-1/8"
- Drop: -12 for optimized rider positioning
- Finish: Matte Black (35)
Elevate your mountain biking experience with the Full Speed Ahead KFX ST Stem - engineered for riders who demand precision, style, and cutting-edge performance from their cockpit. Whether building a custom bike or upgrading for race season, this stem is your go-to choice for superior handling and confident rides.
- Lightweight AL2014 Aluminum and Carbon composite construction provides an optimal balance of strength, weight savings, and durability for aggressive trail riding.
- Advanced CNC-machined design enhances precision fit and structural integrity, ensuring reliable performance under demanding conditions.
- Designed with a 12 drop and 80mm length, this stem offers an aggressive, race-ready positioning ideal for cross-country and trail enthusiasts seeking responsive handling.
- Featuring a sleek black finish and modern aesthetic, it seamlessly integrates into premium MTB cockpits, elevating your bike's style and performance.
- Innovative materials and engineering make this stem highly responsive and stiff, delivering immediate power transfer and improved control on technical climbs and descents.
| Specification | Value |
|---|---|
| Manufacturer | FULL SPEED AHEAD |
| Manufacturer Part No. | 175-0042065030 |
| Universal Product Code | 840031066442 |
| Invoice Description | STEM FSA KFX ST 80mm -12d 31.8 BK |
| Shipping Weight | 0.68 lbs. |
| Package Dimensions | 8.8 x 4.3 x 3.2 |
| Country of Origin | TAIWAN |
| Type | Road |
| Fork Dia | 1-1/8" |
| Length | 80 |
| Bar Clamp | 31.8 |
| Angle | -12° |
| Color | Black |
| Material | AL2014/Carbon |
| Stack Height | 35 |
- 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
-
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
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
