The best-selling Bulldog series u-locks offer excellent security and have best-in-class features to keep your bike safe in medium crime areas

• X2P Double Bolt Locking Mechanism locks shackle on both sides

• Z-Cylinder is bump-proof and resists picking, pulling, or drilling

• Hefty 11-13mm hardened steel shackle resists cutting, prying, and jacking

• Rounded design and centered keyway eliminates pry points

• Double rubber coated crossbar cover protects paint and finished

• Extra thick molded endcaps protect against bumps and hits

• 5 laser-cut keys, 1 with micro-LED

• All-tube mounting bracket included

ONGUARD INNOVATION MEANS MAXIMUM SECURITY

A lock is only as good as its weakest link. And where some locks secure only one side of the shackle, OnGuards patented X4P Quattro Bolt, X2P Double Bolt and X2P Dual Lock Down mechanisms secure both sides for a double-redundant system that resists attack from pulling, jacking and prying. And OnGuards user-settable SBC Steel Ball Combo locks feature a high security click gear system that resists picking and pulling. Simply put, OnGuard lock technology means maximum security.

Of course OnGuard locks offer the best security in the business. But beyond that OnGuard locks are packed with user- friendly, value added features that make closing the sale a slam dunk. From the pick, pull, drill and bump-proof protection of the new Z-Cylinder to new double rubber coatings to the new Twist Lock mounting bracket, nobody gives you more than OnGuard.

X4P Quattro Bolt

X4P Quattro Bolt mechanism secures the shackle to the crossbar in four places maximizing strength to resist pulling, jacking, prying and twisting.

X2P Double Bolt

X2P Double Bolt mechanism secures both sides of he shackle to the crossbar for high resistance to pulling, jacking and prying.

X2P Dual Lock Down

Padlocks with X2P Dual Lock Down mechanisms secure both sides of the shackle for ultimate pull resistance.

X2P Double Bolt

Cable locks with X2P Dual Lock Down mechanisms secure cable to lock head in two places for high pull and pry resistance.

Steel Ball Combo

Steel Ball Combo locks use a smooth running, steel ball click gear system that resists picking and pulling.

Z-Cylinder

The Z-Cylinder offers high pick protection and feature BumpBlockTM technology rendering bump keys useless. Lock mechanism is encased in ultra-hardened steel to resist drilling or pulling.

• The unique construction makes the Z-Cylinder virtually pickproof

• BumpBlock renders bump keys useless

• Ultra-steel encased mechanism defeats drilling

Laser-cut Keys

Locks equipped with Z-Cylinder systems come standard with 4 laser-cut keys plus 1 micro-light key for night use and can be keyed alike with other OnGuard Z-Cylinder locks. In the event that replacement keys are needed, simply call OnGuard and with your key code (or register online after purchase) and replacement keys can be sent to you for a minimal fee.

GLO – Combo

No more fumbling with combinations in the dark. Our Doberman and Terrier Combo Glo locks feature backlit tumblers for ease of use after dark.

*Models 8031GLO, 8061 & 8062

Twist Lock QR Bracket

OnGuard Cable Locks come equipped with our new TwistLock QR Mounting Bracket is a complete redesign offering improved ease-of use. Simply attach the universal mounting bracket to any tube, insert the lock T fixture and twist. To release push the orange release lever and twist. Carrying your lock has never been easier.

Snap Lock QR Bracket

OnGuard U-Locks and cable locks come equipped with a universal mounting bracket that works with any size bicycle tube (22mm-80mm). Plus, the versatile design allows for a variety of placement options- down tube, top tube, seat post, offset, whatever- eliminating interference with cables, water bottle cages or other accessories. Soft rubber interface wont harm bikes finish.

More Protection

New double rubber coatings on U-lock crossbars and shackles and cable lock heads help protect paint and finishes while metal and thick rubber end caps protect against bumps and hits. Z-Cylinders feature new automatic and manual keyway seals to keep water, dirt and grit out of lock internals. Overall tolerances are tighter for better fit and increased resistance to the elements. Chain covers are embroidered, not screened, for long lasting good looks and feature Velcro tabs to keep covers in place to protect paint and finishes. Cables feature tough vinyl coatings on both cable and swedging for long lasting durability and protection.