Hardened Alloy Steel
The 18mm shackles use manganese alloy to resist manual attacks.
Bike locks
/ OKG
OKG Bike locks
These heavy duty security solutions protect motorcycles and electric bikes using hardened alloy steel components. The collection focuses on high-strength shackles and chains designed to resist cutting and prying
Our pick
Worth noticing
Dual-Deadbolt Security
U-locks feature dual-deadbolt mechanisms for anti-theft protection.
Weatherproof Construction
Drill-proof and weatherproof designs ensure long-term outdoor reliability.
Why this brand is here
Heavy Duty Security Standards
The catalog features 12mm chains and 18mm U-shackles built from hardened alloy steel. These models are engineered for motorcycles, trailers, and e-cargo bikes.
- Anti-cut manganese alloy steel
- Dual-deadbolt locking mechanisms
- Four-key security sets
- Drill-proof cylinder protection
- Four-foot hardened chain lengths
- Anti-pry U-lock shackles
Why these models
This range
OKG locks in this range cover Heavy duty bike locks, Heavy duty chain locks, Hardened steel locks, Motorcycle grade locks.
Materials and parts
OKG keeps the build language in the product names: Hardened alloy steel heavy duty chain; Hardened alloy steel small U lock; Manganese alloy steel motorcycle U lock.
Made to use
OKG locks here match Heavy duty bike locks, Heavy duty chain locks, Hardened steel locks, Motorcycle grade locks as the titles describe them.
Details that change
Use Heavy duty bike locks, Heavy duty chain locks, Hardened steel locks, Motorcycle grade locks to tell one OKG model from the next.
Current set
Listed here: 3 locks
Also in For electric bikes Heavy duty
Voices
From this set
The 18mm hardened alloy steel shackle feels incredibly solid on my motorcycle.
I use the 4ft cut-proof chain for my e-cargo bike and it secures easily to the garage anchor.
The dual-deadbolt U-lock is heavy duty and the weatherproof cover keeps the cylinder smooth.
Close labels
Brands like OKG
8.1
Kryptonite
same For electric bikes — 45% higher weight
INTEKIN
same For electric bikes — 44% higher weight
SIGTUNA
same For electric bikes — close across
Via Velo
same For electric bikes — 52% higher weight
Dhiedas
same For electric bikes — same weight
NDakter
same For electric bikes — 21% less weight
Common questions
OKG Questions
What materials are used in OKG U-locks?
The U-locks are constructed from 18mm hardened manganese alloy steel.
Are these locks suitable for outdoor use?
Yes, the models are designed to be drill-proof and weatherproof for outdoor security.
What is the length of the heavy duty chains?
The ultra security chains are 4ft long and 12mm thick.
How many keys are included with the U-locks?
These heavy duty locks come with four keys.