The Beast offers OnGuard's highest security rating for serious protection in high-risk areas. Its titanium-reinforced, 12mm-thick hexagonal links are nearly impossible to cut or break, while the hardened-steel shackle resists picking and boasts two steel pins that engage at both ends to create a redundant, secure system. This lock comes with five keys, including one with a built-in light. The Beast is so strong, it's also approved for use with motorcycles and scooters.

This is one of Kryptonite’s strongest bicycle U-locks; it has more steel than a bank vault. The 18mm MAX-Performance steel shackle and massive crossbar are designed to withstand the most rigorous tests from thieves. The next generation in disc-style cylinders makes picking nearly impossible and the oversize hardened MAX-Performance steel sleeve over the MAX-Performance steel crossbar adds extreme protection to the locking mechanisms. The New York Fahgettaboudit U-lock is 3.25 x 6-inches and has an anti-theft protection offer of $4,500.

Kryptonite's New York Fahgettaboudit is a 14mm, six-sided link chain made of triple heat-treated, boron manganese steel giving it extreme strength. The chain is covered with a durable nylon covering that protects your bike against scratches. This 3.25-foot chain secures with Kryptonite's New York Disc Lock that boasts a 15mm steel shackle for serious security. Plus, three keys are included, with one that has a high intensity LED bulb for convenient, easy unlocking in the dark. This New York Chain has an anti-theft protection offer of $3,750, too.

The KryptoLok Combo U-lock is like a tough nut: you just can't crack it. Thanks to the 13mm hardened Performance steel shackle that resists cutting and leverage attacks, you get peace of mind while you run into the grocery store or lock up outside the coffee shop. A built-in four-digit resettable combination gives you easy unlocking and locking capabilities--no keys necessary! You can also take advantage of the Transit Flex Frame bracket for plenty of convenient mounting options. The KryptoLok Combo is 4 x 8-inches and has an anti-theft protection offer of $1,250.

Featuring a simple, strong, and aggressive design, ABUS' Ultra 410 is the ideal entry-level U-lock. It's simple design conceals a number of high-tech advancements in security. The addition of the Cobra Cable adds security and versatility. The 12mm double-bolting, temper-hardened steel shackle extends all the way through the lock body, providing excellent protection against cutting and torsion attacks in a simple yet innovative design. • Innovative soft-touch housing cover prevents damage to paint • Pass-through shackle provides anti-twist protection • Easy-to-mount SH 34 bracket mounts easily to frames with a 24-35mm diameter • Double-layered cylinder with special wafers and additional decoy cuttings protects against picking • Mechanism Type: Key • Diameter: 12 mm • Shackle Shape: Round • Shackle Height: 230 mm • Shackle Width Inner: 11.8 cm • 2 keys are supplied with the lock

The KryptoFlex 1004 Double Loop Cable is a 3/8-inch braided steel cable providing increased cut resistance. The double loops are for use with U-locks, disc locks and padlocks. The vinyl coating protects bikes and equipment from scratches. It includes the Hook-n-Loop strap for easy carrying. The KryptoFlex 1004 Looped Cable is 3/8-inch x 4-feet.

OnGuard's Bulldog DT pairs a tough-as-nails U-lock with a sturdy steel cable for increased security. The 1/2-inch hardened steel resists cutting, and OnGuard's stout X2 double-bolt lock mechanism is pick, drill, bump, and pull-resistant. Plus, the included cable is 4-feet long so you can lock both wheels and the frame without any bike disassembly, making lock-up faster, easier and more secure. This great U-lock also comes with five keys, including OnGuard's Microlight key which has a built-in light.

Big cities call for big protection, and Kryptonite's New York Chain delivers with 12mm six-sided chain links made from hardened manganese steel. Wrap this burly lock around your frame worry-free thanks to the durable nylon cover that protects your bike's paint from scratches. Leave with peace of mind knowing the 14mm hardened Max-Performance steel shackle mated to the Evolution Series 4 Disc Lock is on duty. With a double deadbolt design to protect against twist attacks, would-be thieves don't stand a chance. It comes with three stainless steel keys--one of which is lighted for night access!

Kryptonite's Keeper 12 U-Lock is like a tough nut: you just can't crack it. Thanks to the 12mm hardened steel shackle that resists cutting and leverage attacks, you get peace of mind while you run into the grocery store or lock up outside the coffee shop. The shackle connects to the disc-style cylinder for exceptional security, and it all sits in the click-style transportation bracket so it stays stable during transport. To top it all off, you get a reinforced collar over the keyway for added protection, not to mention Kryptonite's $500 Anti-Theft Protection offer.

Kryptonite's Keeper 785 Integrated Chain features a 7mm-thick, four-sided link chain perfect for use in low- to moderate-risk locations. The triple heat-treated manganese steel chain has a durable nylon cover to protect your bike from scratches. Plus, it uses an integrated hardened deadbolt that is pick and drill resistant, and it thwarts most leverage attacks as well.

Kryptonite's Transit FlexFrame U-Bracket makes it easy to carry your U-lock on your bike so it's always handy. This simple mount fits on frame tubes from 25 to 80mm in diameter and it accepts most 13 and 16mm-diameter round-shackle U-locks. Plus, the clamp rotates so you can perfectly align the lock with your bike to keep it tucked out of the way.

ABUS's U-locks offer strength, durability and protection you can count on. Their Ultimate 420 U-Lock boasts a hardened steel shackle and a hardened lock body to keep your bike safe and sound. Plus, its reversible key is easy to use, and you can carry the Ultimate on your bike with the included mounting bracket. The protective cover over the lock barrel keeps dust and dirt out of the key mechanism.

OnGuard's Terrier is a compact, lightweight cable lock perfect for low-risk areas. It features a resettable 4-digit lock, so you don't have to worry about forgotten keys. The raised dials are easy to use with gloves, a Velcro strap keeps the lock neat so it fits in a pocket, and the vinyl coating protects finishes. Lock up your bike during quick coffee runs or secure your snowboard to the rack—you'll find a million uses for this versatile little lock!

The innovative uGrip Bordo 5700 folding lock from ABUS is secure, slim and handy! This folding lock uses 5mm-thick steel bars to secure your bike to any convenient post or bike rack, and features special rivets to ward off twisting attacks. The soft silicone coating won't scratch your frame and comes in an array of fun colors. An ABUS Premium lock cylinder resists tampering and picking so you can park your bike with confidence.

With OnGuard's Doberman Combo lock, all you need is your bike, the lock, and a number you can remember. This combination lock uses four numbers and can be reset any time. It's made from a strong steel cable covered with tough vinyl to protect both itself and your bike. The Doberman Combo is also self-coiling for easy transport.

The KryptoFlex 815 Combo Cable is an 8mm braided steel cable to be used in low-crime areas or as a secondary security measure. The integrated, four-digit resettable combination lock has indexed number dials to provide error-free combination setting. The KryptoFlex 815 Combo Cable is 5/16-inch x 5-feet.

Lock your bike's quick-release components with Kryptonite's 4-foot long Keeper 512 Combination Cable. It's a 5mm braided steel cable that offers increased cut resistance and features a pre-set combination closure. The vinyl coating protects bikes and equipment from scratches, too.

The KryptoFlex 1230 Combo Cable is a 12mm braided steel cable to be used in low-crime areas or as a secondary security measure. With an integrated, four-digit resettable combination lock that features indexed number dials to provide error-free combination setting, lock up and release are a snap. During transit, the Hook-n-Loop strap supports the cable while the Transit Flex Frame Bracket provides plenty of tool-free mounting options.

Serfas' Combo Cable Lock offers convenient protection. The 12mm-diameter cable reaches over 6-feet and self coils for easy storage. A 4-digit customizable combination lock, surrounded by molded rubber, ensures your bike stays put. And, a vinyl coating protects your bike's finish so it looks just as good when you return to ride it.

Kryptonite's Disc Stainless Steel Padlock features an armor-protected shackle to defend against cutting attacks. The stainless-steel deep-welded body resists hammer and cut attacks, too. And, this fine 70mm lock includes a 5-pin brass cylinder for added protection.

The extra-secure Stronghold In-Ground Anchor provides a convenient place for locking valuable equipment either inside or outdoors. The 16mm-diameter hardened-carbon-steel shackle provides a maximum-security locking point and lays flat when not in use. Easy-to-install cement anchor bolts and masonry bits to install them are included.

Big cities call for big protection, and Kryptonite's New York Fahgettaboudit delivers with 14mm six-sided chain links made from hardened manganese steel. Wrap this burly lock around your frame worry-free thanks to the durable nylon cover that protects your bike's paint from scratches, and leave with peace of mind knowing the 15mm hardened Max-Performance steel shackle is on duty. With a double deadbolt design to protect against twist attacks, would-be thieves with an eye on your bike can fahgettaboudit because you're the only one with access to your bike with three stainless steel keys--one of which is lighted for night access!

Kryptonite's Modulus Accessory Bracket is for use with their Modulus locking system (sold separately). Grab a spare bracket to use your system on a second bike or attach it to your car's bike rack to use your Modulus lock to protect your two-wheelers on trips.

The HardWire 2018 Key Cable is a 20mm braided steel cable that provides increased cut resistance. A reinforced lock head construction with the "TALON" lock pin retention system provides extra holding power, and a dual sliding cylinder weather guard protects the cylinder from dirt, water and road grime. The HardWire 2018 Key Cable is .75” x 6’.

Kryptonite's HardWire 2085 Key Cable is a 20mm braided steel cable that provides increased cut resistance. A reinforced lock head construction with Kryptonite's Talon lock pin retention system provides extra holding power, and a dual-sliding cylinder weather guard protects the cylinder from dirt, water, and road grime. The HardWire Key Cable is 3/4-inch x 2.75-feet.

The KryptoFlex 818 Cable and Padlock is an 8mm braided steel cable providing increased cut resistance. The double loops on the ends easily lock with the included key padlock, while the vinyl coating protects bikes and equipment from scratches. The KryptoFlex 818 Cable & Padlock is 8mm x 6-feet.

Protect your bicycle with the ABUS Tresorflex 1360 Combo lock. It features a tough steel cable that's surrounded by hardened steel links and it's all wrapped up in a finish-protecting sleeve so you can lock up with peace of mind. And, you can set your own combination on the easy-spinning digit wheels, too.

ABUS' U-locks offer strength, durability and protection you can count on. The Buffo 34 U-Lock boasts a 12-mm thick, hardened steel shackle and a hardened lock body to keep your bike safe and sound. Its reversible key is easy to use and you can carry the Buffo on your bike with the included bracket.

The ABUS Booster 670 Cable features a strong, self-coiling 15mm-thick steel cable secured with a sturdy keyed lock. The cable has a soft, durable cover that protects your bike's finish. And, the handy bracket lets you attach the lock to your frame or seatpost for convenient transportation.

ABUS' innovative Bordo Granit X-Plus 6500 folding lock offers serious theft protection in a handy, compact package! Attach the slim case (included) to your frame, pedal away, and when you arrive at your destination, simply pull out your trusty Bordo, unfold it and enjoy the tough security of an ABUS lock! It's made from 5.5mm-thick hardened steel and boasts a soft silicone coating that's gentle on your bike's finish. And, the ABUS X-Plus key cylinder is tamper resistant, too.