About The Product
- Steel Ball Combo lock is permanently forged to a titanium reinforced hardened steel square link chain
- Protective casing protects your chain from the elements and your bike from the chain
- High visibility easy to read digits
High-Security Onguard Combination Chain Lock 6mm | 4-foot / 122cm | Black Titanium Reinforced
Enhance the security of your bike with the Onguard Mastiff Chain Lock, a premium combination lock designed for avid cyclists and urban commuters. This high-performance lock features a durable 6mm hex-link chain forged from hardened steel and reinforced with titanium, making it virtually impossible to cut or break. Its innovative materials and engineering deliver unbeatable security without adding unnecessary weight, perfect for bike riders seeking reliable protection on the go.
Materials & Construction:
Constructed from a hardened steel square link chain, this lock is permanently forged for maximum strength. Titanium reinforcement along each link provides superior cut resistance, elevating security standards for bicycle protection. The chain is equipped with a water- and heat-resistant cover, safeguarding against corrosion, abrasion, and weather elements to ensure longevity and dependable performance in all conditions.
Performance & Engineering:
Engineered for high security and durability, the Mastiff Chain Lock combines cutting-edge steel forging technology with titanium reinforcement to prevent theft attempts involving sawing or cutting tools. The lock features an easy-to-use 5-digit resettable combination mechanism, enabling quick access without keys-ideal for riders who prefer keyless convenience.
Components & Technology:
- Combination Lock: A secure 5-digit resettable digit code offers customizable access and eliminates key concerns.
- Hex-Link Chain: 6mm hex-link chain provides a robust structure resistant to leverage and physical attacks.
- Protective Cover: Water- and heat-resistant casing extends chain lifespan and prevents chain abrasions on your bike frame.
- High-Visibility Features: Bright yellow accents and easy-to-read digits enhance visibility and ease of use.
Style & Use Case:
Designed for urban commuting, bike storage, and high-theft risk environments, the Onguard Mastiff Chain Lock combines sleek black and yellow styling with practical portability. Its 4-foot (122cm) length offers versatile locking options-secure your bike frame and wheel to stationary objects quickly and reliably.
Innovative & Differentiating Features:
- Titanium reinforcement provides nearly unmatched cut resistance.
- Water and heat resistance safeguard against weather-related wear.
- Keyless 5-digit combination enhances convenience and security.
- Heavy-duty forged steel links ensure lasting performance.
Specifications:
- Model Name: Mastiff Chain
- Length: 122cm (48 inches)
- Chain Diameter: 6mm
- Color: Black with Yellow accents
- Lock Type: Combination (5-digit resettable)
Trust the Onguard Mastiff Combination Chain Lock for unbeatable security, durability, and style-perfect for cyclists who demand the best in safeguarding their ride against theft.
- Unparalleled security with a durable 6mm titanium-reinforced hardened steel chain, providing superior cut resistance and peace of mind.
- Constructed with high-strength, lightweight materials-featuring an 8-10mm hex-link chain and a water and heat resistant cover to protect against harsh weather conditions and bike abrasion.
- Equipped with innovative locking technology: select either a keyed lock with five easy-to-use keys-including a micro-light for low-light visibility-or a resettable five-digit combination lock for quick, keyless access.
- Designed for versatile use, this high-security chain lock is ideal for urban commuting, bike storage, or securing high-value bikes, combining style with robust performance.
- Features high visibility, easy-to-read digital or key access, and a sleek black titanium finish, making it both a functional security solution and a stylish cycling accessory.
| Specification | Value |
|---|---|
| Manufacturer | ONGUARD |
| Manufacturer Part No. | 8123 |
| Universal Product Code | 768661281236 |
| Invoice Description | LOCK OG CHAIN 8123 COMBO 4fx6mm BK |
| Shipping Weight | 1.77 lbs. |
| Package Dimensions | 7.2 x 7.3 x 1.9 |
| HTS Number | 8301.10.5000 |
| Country of Origin | CHINA |
| Diameter | 6mm |
| Length | 4`/122cm |
| Type | Combo |
| Color | Blk |
- 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
