OnGuard

Lock Og U 8013M Bulldog Med

What Our Gearhead® Experts Are Saying:

"I use the Bulldog 8013M for daily bike commuting, and it’s the perfect size for locking up in tight urban spots. The double-bolt system adds serious security, and the shorter shackle fits around those tricky meter posts without extra bulk. It feels solid, locks cleanly, and gives me peace of mind every time I walk away from my ride."

Whether we’re navigating tight city blocks or running errands on our daily commuter, the Bulldog Medium U-Lock #8013M keeps our ride secure without adding unnecessary bulk. Compact, strong, and thoughtfully engineered, this best-selling lock features a hardened 13mm steel shackle and double-bolt X2P locking system that holds tight against cutting and leverage attacks. The Z-Cylinder resists picking, pulling, and drilling for extra peace of mind during long lock-ups.

Designed to thrive in fast-paced urban environments, the Bulldog’s short shackle easily wraps around parking meter posts and bike racks. Its fully rubber-coated body and double-rubber crossbar cover protect bike finishes while the included all-tube mounting bracket keeps it at the ready. Built for messengers, commuters, and everyday cyclists, the Bulldog 8013M strikes the perfect balance between portability and power.