# ONGUARD bicycle chain lock MASTIFF 8021 — 180 cm length, 10 mm chain, includes 5 coded keys

**URL:** https://aio.lv/en/product--onguard-ong-8021--12058836
**Data updated:** 2026-07-08 17:26 (EEST)
**Category:** Bicycle accessories
**Manufacturer:** ONGUARD
**Manufacturer code:** ONG-8021
**EAN:** 7290001280218
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 101.49 €
**Prices and availability valid until:** 2026-08-16 23:59
**Price without VAT (21%):** 83.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onguard-ong-8021--12058836

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.08.2026 | free |
| Pickup points | 11.08.2026 | 1.79 EUR |
| Courier delivery to door | 11.08.2026 | 4.99 EUR |

## Summary description

ONGUARD MASTIFF 8021 is a bicycle chain lock with a 180 cm long, 10 mm thick chain designed for securing bikes and similar outdoor equipment. The lock set includes five coded keys for shared use or spares. It provides flexible coverage for frame and wheel locking, suitable for urban commuting, short-term stops and securing multiple bicycles together.

## Long description

ONGUARD MASTIFF 8021 is a bicycle chain lock with a 180 cm long, 10 mm thick chain designed to secure bicycles and similar outdoor equipment. The chain provides flexible reach to loop around frames, wheels and fixed objects, while the included locking mechanism accepts five coded keys, allowing multiple users or spare keys for shared use. The design balances portability with coverage, making it suitable for everyday urban use and short stops.
Advantages
The 10 mm hardened chain combines resistance to casual attacks with manageable weight for carrying during commutes. The 180 cm length enables versatile locking configurations, including securing a bike to bike racks, poles or grouping several bicycles together. Including five coded keys reduces the need to duplicate or share keys immediately and simplifies access for multiple users. The lock head is integrated for straightforward operation.
Suitable for
Securing commuter and city bicycles during short stops
Locking children's bikes and similar outdoor ride-on equipment
Grouping multiple bicycles together at racks or stands
Temporary locking in urban environments such as campuses or bike parking areas
Key specifications
Chain length: 180 cm
Chain thickness: 10 mm
Locking mechanism: keyed cylinder with coded keys
Number of keys included: 5 coded keys
Intended use: outdoor bicycle security for short to medium duration stops
How to use
Wrap the chain around the bicycle frame and a fixed object or through the wheel and frame as appropriate, then insert the chain end into the lock head and turn the key to secure. When unlocking, insert the correct coded key and turn to release the chain. Carry the chain lock on the frame using a mount or in a bag when not in use. Regularly check the locking cylinder for debris and operate the key gently to maintain smooth function.
Usage recommendations
For best security, pass the chain through the frame triangle and at least one wheel, and secure to an immovable object. Use multiple locks or combine with a U-lock for higher-risk locations. Store spare coded keys separately and periodically lubricate the cylinder with a dry lubricant to reduce wear and prevent jamming.

## FAQ

### How much does the ONGUARD MASTIFF 8021 bicycle chain lock cost, and is it available for purchase?

The price is 101.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 06.08.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can ONGUARD MASTIFF 8021 bicycle chain lock be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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/12058836/67544541_large.webp