OnGuard Mastiff Chain & Lock
Best heavy-duty security for urban commuters needing reliable bike protection.
This heavy-duty chain provides serious peace of mind for high-risk parking situations. The titanium-reinforced links are built to withstand aggressive cutting tools, while the four-sided locking mechanism effectively thwarts picking and pulling. It is a robust, no-nonsense solution for keeping a bike secure.
$87.96
at
Lockitt
More Mastiff options
Who it's for
- Urban commuters needing maximum theft deterrence for high-risk areas
- Cyclists seeking heavy-duty protection against aggressive cutting tools
- Forgetful owners who appreciate backup keys and registration support
Who should skip it
- Cyclists locking up in tight, space-constrained urban environments
- Commuters who prioritize a lightweight, portable bike setup
- Budget-conscious riders looking for an affordable, entry-level lock
Performance breakdown
Theft Deterrence
Hardened steel links provide serious resistance against bolt cutters and saws.
Portability
Heavy-duty construction makes this a challenge to carry on long rides.
Locking Versatility
The chain length offers enough flexibility to secure frames to awkward racks.
Build Durability
Rugged materials withstand harsh weather and daily abuse without showing wear.
Key Convenience
Five included keys ensure you always have a spare ready.
Ease of Use
The weight and chain bulk require some patience during quick stops.
Key Specs
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10mm
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3.5 feet
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Hardened steel
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Mini U-lock / Disc Lock (Model 8048)
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14mm
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5
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