# Bike Chain Lock ONGUARD MASTIFF 8120 120 cm × 8 mm with 5 coded keys

**URL:** https://aio.lv/en/product--onguard-ong-8120--12083587
**Data updated:** 2026-03-13 08:55 (EET)
**Category:** Kids’ Ride-On Accessories
**Manufacturer:** ONGUARD
**Manufacturer code:** ONG-8120
**EAN:** 7290001281208
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 47.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 39.66 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onguard-ong-8120--12083587

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

ONGUARD MASTIFF 8120 is a bicycle chain lock with a 120 cm long, 8 mm thick chain designed to secure bikes and similar outdoor equipment. The lock set includes five coded keys for convenient access and key replacement. Its chain format provides flexible fastening around frames, poles or bike racks for everyday urban and commuter security.

## Long description

ONGUARD MASTIFF 8120 is a bicycle chain lock with a 120 cm long, 8 mm thick chain designed for securing bicycles and comparable outdoor equipment. The set includes five coded keys to simplify day-to-day access and to provide spare keys for replacement. The chain format allows flexible fastening around frames, poles and bike racks, making it suitable for urban and commuter use where a combination of reach and moderate resistance is required.
Advantages
The MASTIFF 8120 combines a long, articulated chain with a compact coded locking mechanism to deliver versatile security without excessive bulk. An 8 mm steel chain offers a balance between flexibility and cut resistance for routine outdoor locking. Including five coded keys reduces the risk of being locked out and makes it easier to share access with family members or caretakers. The chain coating protects the bicycle finish while providing weather resistance for everyday use.
Suitable for
 Securing adult and children's bicycles in urban environments
 Locking bikes to racks, poles or fixed structures
 Short- to medium-term locking during commutes, errands or school runs
 Use with scooters, wheelchairs or other outdoor equipment of similar size
Key specifications
 Chain length: 120 cm
 Chain thickness: 8 mm
 Lock type: coded key lock with five supplied keys
 Chain format: articulated links with protective coating
 Primary use: outdoor bicycle security
How to use
Wrap the chain around the bicycle frame and a fixed object such as a bike rack or pole, ensuring it passes through the frame and, if possible, the wheel. Insert the chain end into the locking mechanism and turn the coded key to lock; keep spare keys in a secure location. When unlocking, insert the matching key and rotate to release the chain. Store the lock in a dry place when not in use to prolong life and check the coating and key mechanism periodically for wear or corrosion.
Usage recommendations
For the best practical security, lock the frame and at least one wheel to an immovable object, avoid leaving the bike unattended in high-risk locations for extended periods, and carry a spare coded key separate from the primary key. Regularly inspect the chain coating and moving parts; replace the lock if links show significant deformation or the key mechanism becomes stiff.

## FAQ

### How much does the ONGUARD MASTIFF 8120 bike chain lock 120cm cost, and is it available for purchase?

The price is 47.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ONGUARD products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ONGUARD service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12083587/67567657_large.webp