Master Lock Co 8170D U-lock Bike Lock 13MM Steel

Product Description

The MASTER LOCK CO 8170D is a U-lock bicycle security lock designed for securing bikes to fixed objects in outdoor and urban environments. The shackle is constructed from 13MM hardened steel, providing resistance against hand tools and common cutting attacks. A high-security disc-style key cylinder is integrated into the lock body to offer additional anti-pick protection against lock-picking attempts. A mounting bracket is included, allowing the lock to be carried on the bicycle frame during transport. Installation and use require no special trade credentials, making this unit suitable for consumers and facilities personnel managing fleet bicycles.

This U-lock is suited for residential, commercial, and institutional applications where bicycle security is required. Typical use cases include securing personal bikes at urban bike racks, commercial fleet bicycles at facilities, and campus or multi-unit residential bike storage. The compact 4 x 8 inch shackle clearance accommodates standard bike frames and common rack configurations. The included mounting bracket supports frame-mounted carry on most bicycle types.

Key Features

• 13MM hardened steel shackle resists hand tools and common cutting attacks
• High-security disc-key cylinder provides anti-pick protection
• 4 x 8 inch interior shackle clearance fits standard bike frames and racks
• Mounting bracket included for frame-mounted carry during transport
• Sold as individual unit within a package quantity of 6

Compatibility

Designed as a general-purpose U-lock compatible with standard bicycle frames, handlebars, seat posts, and common fixed bike rack configurations.

Installation Notes

No specialized trade installation is required for this product. Attach the included mounting bracket to the bicycle frame using the provided hardware before first use. Ensure the shackle is fully engaged and the locking mechanism is confirmed locked before leaving the bicycle unattended. Inspect the shackle and lock body periodically for signs of wear or tampering.

Technical Specifications

• Shackle Material: Hardened Steel
• Shackle Diameter: 13MM
• Interior Clearance Width: 4 inches
• Interior Clearance Height: 8 inches
• Weight: 11.76 pounds
• Package Quantity: 6
• Unit of Measure: EA

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 8170D