OnGuard BullDog Series U-Lock - 4.5 x 9" | Combination

OnGuard BullDog Series U-Lock - 4.5 x 9" | Combination OnGuard

OnGuard BullDog Series U-Lock - 4.5 x 9" | Combination

OnGuard BullDog Series U-Lock - 4.5 x 9" | Combination

OnGuard logo

Why Is the BullDog U-Lock a Top Pick for Cyclists?

The OnGuard BullDog Series U-Lock is built for cyclists who want serious security without the key fumble. The X2P Double Bolt lock mechanism engages both ends of the shackle simultaneously, making it exponentially harder to defeat than single-bolt designs. The 13mm hardened steel shackle provides a full circle of cut resistance, giving you confidence at any rack in any neighborhood.

At 4.5 x 9 inches, the BullDog offers a practical locking footprint that fits most bike frames and standard racks without excess play for a pry bar. The combination format removes the need to carry keys, making it ideal for riders who prefer a streamlined kit. It's a well-priced, high-protection lock suited to urban commuters, café racers, and anyone parking regularly in moderate to high-theft areas.

$54.95
$54.95
Shipping calculated at checkout.

2 in stock

  • Orders over $100 ship free!
  • Estimated delivery: Mar 18 - Mar 22

Ask a question

The fields marked * are required.

more details:

OnGuard logo

Specifications

  • Shackle: 13mm hardened steel
  • Lock Mechanism: X2P Double Bolt combination
  • Interior Dimensions: 4.5 x 9 inches
  • Lock Type: Combination (no key)

FAQ

What does the X2P Double Bolt mechanism do?

It locks both ends of the shackle simultaneously, creating a full circle of protection and making it significantly more resistant to cutting and prying than single-bolt locks.

Is the BullDog combination lock resettable?

The BullDog combination is factory-set and not user-resettable. For a resettable option, see the OnGuard Terrier cable lock.

What size bike will the BullDog 4.5 x 9 fit?

The 4.5 x 9 inch interior fits most road, gravel, and mountain bike frames when locking through the frame and rear wheel to a standard rack or post.

Best For

Urban commuters and cafe cyclists who want high-security, key-free locking in a compact U-lock format, especially in moderate to high-theft environments.

OnGuard BullDog Series U-Lock - 4.5 x 9" | Combination Reviews:

You may also like