Onguard Bull Mastiff 8103 Keyed Padlock - Harley & Indian V-Twin
About Onguard
Onguard parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every Onguard item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
The Onguard Bull Mastiff 8103 padlock is a heavy-duty security solution for V-twin motorcycles, built to resist tampering. This keyed lock features a tight shackle-to-body clearance, minimizing pry points and enhancing its strength against forced entry. Designed for convenience, it offers smooth one-handed rotary operation, making it easy to secure your Harley-Davidson or Indian Motorcycle quickly.
Why riders pick this
- Keyed padlock with smooth rotary operation
- Tight shackle-to-body clearance resists prying
- Designed for convenient one-handed use
- Includes five heavy-duty F-style keys
- Heavy-duty construction for V-twin security
When securing your V-twin, you need a padlock that's as tough as your ride. The Onguard Bull Mastiff 8103 delivers with its robust construction and intelligent design aimed at thwarting thieves. The tight tolerances between the shackle and body significantly reduce vulnerable pry points, making it a formidable deterrent against common theft methods. This padlock is ideal for securing chains, gates, or other critical points on your motorcycle.
Robust Design, User-Friendly Operation
- Heavy-duty keyed padlock with smooth rotary operation
- Tight shackle-to-body clearance resists prying and cutting
- Designed for convenient one-handed use
- Includes five heavy-duty F-style keys for spares
- Engineered for V-twin motorcycle security
Reliable Security for Your Motorcycle
The Onguard Bull Mastiff 8103 is a smart investment for any Harley-Davidson or Indian Motorcycle owner looking for reliable security. Its user-friendly one-handed operation means less fumbling when you're trying to secure your bike in a hurry. With five included keys, you'll always have a spare, ensuring long-term utility for this essential security upgrade.
Specifications
- Brand: Onguard
- Manufacturer Part #: 45008103
- UPC: 768661281038
- Length: 6.5 in
- Width: 4 in
- Height: 1.5 in
- Weight: 6.6 lbs
- Country of Origin: China (Mainland)
Common questions
Will this padlock fit my Harley-Davidson or Indian Motorcycle?
Yes, the Onguard Bull Mastiff 8103 is designed for V-twin motorcycles, including Harley-Davidson and Indian models. Please verify your specific application requirements.
How many keys are provided with the Bull Mastiff 8103 padlock?
Each Onguard Bull Mastiff 8103 padlock comes with five heavy-duty F-style keys, so you'll have plenty of spares.
What makes this padlock resistant to prying and cutting?
The Bull Mastiff 8103 features a tight shackle-to-body clearance, which significantly reduces the leverage points available for prying tools and makes it harder to cut the shackle.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Onguard |
| TYPE | Security |
| SKU | 57-9616 |
| WEIGHT | 6.6 lb |
