About The Product
- 1/2" X 1/8" chain for use with single speed, internally geared and fixie bikes
- Anti-Drop design helps reduce the likelihood of dropped chains
- Formerly the Z410 model
Upgrade your bike's drivetrain with the KMC S1 Chain Single Speed 1/2" x 1/8" - a high-performance, durable, and stylish chain designed for single speed, BMX, fixie, and track bikes. Engineered for reliability and optimized for smooth, secure riding, this black anti-drop chain ensures you stay focused on the road or trail without worry of chain drops.
Materials & Construction:
Made from high-quality, corrosion-resistant alloy steel (DB), the KMC S1 chain offers exceptional strength and longevity. Its black finish not only provides a sleek, modern aesthetic but also adds an extra layer of corrosion resistance, making it ideal for urban environments, beach cruisers, and electric bikes.
Performance & Engineering:
Featuring a lightweight yet robust design, this chain is built for high efficiency and durability. The anti-drop design reduces chain derailments, ensuring a safer ride on rough terrain or during aggressive riding styles. The chain's 8.6mm width and 112 links make it suitable for various single speed and internally geared bikes.
Components & Technology:
The KMC S1 chain incorporates premium components like heavy-duty outer plates with specially shaped, extra-thick design for frequent grinding and tough riding conditions. The bulls-eye riveting enhances chain strength and performance under load, while the bushing-less design minimizes unnecessary weight and simplifies maintenance.
Style & Use Case:
With its sleek black finish, the S1 chain complements urban, BMX, fixie, and track bike aesthetics. Whether you're commuting through city streets, hitting the BMX park, or customizing your fixed gear, this chain delivers a blend of style and function. Its versatile design makes it suitable for electric bikes, beach cruisers, and bikes with internal gear hubs.
Innovative & Differentiating Features:
- Anti-drop design reduces chain drops during high-intensity rides
- Heavy-duty outer plates with extra-thick construction for increased durability
- Bulls-eye riveting for enhanced strength and longevity
- Bushing-less design for simplified maintenance and reduced weight
- Suitable for 1-speed, BMX, fixie, and internal gear hub setups
Item Specifications:
- Size: 1/2" x 1/8"
- Material: Alloy Steel (DB)
- Links: 112
- Width: 8.6mm
- Color: Black
- Model: S1 BMX (formerly Z-410)
- Compatibility: Single speed, internally geared bikes, and fixies
Whether upgrading your existing drivetrain or building a custom ride, the KMC S1 Chain offers premium engineering, reliable performance, and a sleek black look. Optimize your bike's efficiency today with this high-quality, SEO-friendly cycling essential!
- High-performance 1/2" x 1/8" single speed chain designed for BMX, mountain bikes, fixies, and track cycling, ensuring durability and smooth power transfer.
- Constructed from high-grade stainless steel and nickel-plated options, offering excellent corrosion resistance and long-lasting performance in diverse riding conditions, including electric bikes and beach cruisers.
- Features innovative anti-drop technology and chamfered links to minimize chain drops during aggressive rides, providing added security and confidence on challenging terrains.
- Engineered with extra-thick outer plates, bulls-eye riveting, and a bushing-less design, optimizing strength, flexibility, and efficiency for frequent grinding, jumping, and intense cycling sessions.
- Sleek black finish with precise engineering makes this chain both stylish and functional, ideal for upgrading your singlespeed, fixed gear, or internal gear hub bike to improve drivetrain performance and reliability.
| Specification | Value |
|---|---|
| Manufacturer | KMC |
| Manufacturer Part No. | CN41070 |
| Universal Product Code | 766759241070 |
| Invoice Description | CHAIN KMC S1 1s BK 112L |
| Shipping Weight | 0.81 lbs. |
| Package Dimensions | 3.9 x 4.1 x 1 |
| Country of Origin | TAIWAN |
| Speeds | 1sp |
| Size | 1/2x1/8 |
| Links | 112L |
| Material | DB |
| Color | Black |
| Width | 8.6mm |
- 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
