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Locks/Security

Check out all our bike locks and security accessories for sale at South Shore Cyclery in Milwaukee

Protect your bike from theft and tampering with heavy-duty locks and security accessories. South Shore Cyclery offers a wide range of cable locks, U-locks, frame locks, and folding locks. There are also battery locks and security nuts to keep your bike's smaller components safe.

Jump directly to any of our bike accessories categories:

$54.95
OnGuard's Bulldog Combo DT will guard your bike day and night. It boasts a 13mm-wide hardened-steel shackle and OnGuard's resettable 4-digit combination lock for top-notch protection. There's also a 4-foot braided steel cable to lock up wheels and accessories. With the included mounting bracket, you can bring this lock along for every ride.
$67.95
Constantly improving. Kryptonite's New-U generation of U-Locks features a patent-pending double deadbolt design, anti-rotation capability, sliding dust covers, and an updated, modern design. The KryptoLok has a security rating of 6/10 making it a great choice for quick urban stops or longer suburban stops. Specifications & Features: - 6/10 security rating - 12.7mm hardened PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT DESIGN gives additional protection against twist attacks - HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking - Includes 4’ KRYPTOFLEX DOUBLE LOOPED CABLE for securing front wheel or accessories - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - Protective vinyl coating - Key Safe Program - Product dimensions: 3.25” x 7” (8.2cm x 17.8cm) - Product weight: 3.25 lbs (1.47 kgs)
$67.99
Constantly improving. Kryptonite's New-U generation of U-Locks features a patent-pending double deadbolt design, anti-rotation capability, sliding dust covers, and an updated, modern design. The KryptoLok has a security rating of 6/10 making it a great choice for quick urban stops or longer suburban stops. Specifications & Features: - 6/10 security rating - 12.7mm hardened PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT DESIGN gives additional protection against twist attacks - HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - Protective vinyl coating - Key Safe Program - Product dimensions: 4” x 9” (10.2cm x 22.9cm) - Product weight: 2.9 lbs (1.32 kgs)
$63.99
Constantly improving. Kryptonite's New-U generation of U-Locks features a patent-pending double deadbolt design, anti-rotation capability, sliding dust covers, and an updated, modern design. The KryptoLok has a security rating of 6/10 making it a great choice for quick urban stops or longer suburban stops. Specifications & Features: - 6/10 security rating - 12.7mm hardened PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT DESIGN gives additional protection against twist attacks - HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - Protective vinyl coating - Key Safe Program - Product dimensions: 3.25” x 7” (8.2cm x 17.8cm) - Product weight: 2.5 lbs (1.13 kgs)
$109.95
Kryptonite's Evolution Series 4 1090 Integrated Chain is a 10mm-thick, six-sided link chain made of triple-heat-treated manganese steel for maximum strength. At 35.5-inches long, the Evolution gives you biking security in an easy-to-carry package. The links are covered with a weather-resistant nylon sleeve that protects your bike's finish, and it uses an integrated high-security cylinder that is pick, drill, and cut resistant. Three keys are included, including one that has a high-intensity LED bulb for convenient, easy unlocking in the dark. This chain has an anti-theft protection offer.
$59.99
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.
$98.95
Kryptonite's Evolution Series 4 1055 Mini Integrated Chain is a 10mm-thick, six-sided link chain made of triple-heat-treated, boron-manganese steel for maximum strength. At 21.5 inches long, the Evolution gives your bike security in a pint-size package. The links are covered with a weather-resistant nylon sleeve that protects your bike's finish, and it uses an integrated high-security cylinder that is pick, drill, and cut resistant. Three keys are included, including one that has a high-intensity LED bulb for convenient, easy unlocking in the dark. This chain has an anti-theft protection offer.
$65.95
- End link locking point for extensive holding power - 4-sided 3t manganese steel chain links - 4 digit resettable combination over 10,000 codes - Patent pending lock head design - Combo Safe Program - Product dimensions: Length 120cm - Product weight: 4.50 lbs
$97.95
Specifications & Features: - 7/10 security rating - 13MM HARDENED MAX-PERFORMANCE STEEL SHACKLE resists bolt cutters and leverage attacks - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist attacks - NEW SLIDING DUSTCOVER - NEW DOUBLE DEADBOLT DESIGN - HIGHER SECURITY DISC-STYLE CYLINDER is pick and drill resistant. - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - 3 STAINLESS STEEL KEYS — including new key design and one LED REPLACEABLE KEY FOB - Protective vinyl coating - Key Safe Program - Product dimensions: 3.25” x 9.5” (8.3cm x 24.1cm) - Product weight: 3.15 lbs (1.43 kgs)
$97.95
Specifications & Features: - 7/10 security rating - 13MM HARDENED MAX-PERFORMANCE STEEL SHACKLE resists bolt cutters and leverage attacks - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist attacks - SLIDING DUSTCOVER - DOUBLE DEADBOLT DESIGN - HIGHER SECURITY DISC-STYLE CYLINDER is pick and drill resistant. - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - 3 STAINLESS STEEL KEYS — including new key design and one LED REPLACEABLE KEY FOB - Protective vinyl coating - Key Safe Program - Product dimensions: 3.25” x 7” (8.3cm x 17.8cm) - Product weight: 3.55 lbs. (1.61 kgs)
$66.99
Constantly improving. Kryptonite's New-U generation of U-Locks features a patent-pending double deadbolt design, anti-rotation capability, sliding dust covers, and an updated, modern design. The KryptoLok has a security rating of 6/10 making it a great choice for quick urban stops or longer suburban stops. Specifications & Features: - 12.7mm hardened PERFORMANCE STEEL SHACKLE - New Patent-pending HARDENED DOUBLE DEADBOLT DESIGN gives additional protection against twist attacks - HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - Protective vinyl coating - Key Safe Program - Product dimensions: 4” x 9” (10.2cm x 22.9cm) - Product weight: 2.9 lbs (1.32 kgs)
$65.00 - $75.00
HEXBAND is the latest addition to the OTTOLOCK line, featuring added resistance to shearing tools and cable cutters, making it a stronger quick-stop bike lock for users with higher security requirements. HEXBAND is differentiated by using six stainless steel band layers (versus three in the original) while still being wrapped in an internal aramid fiber jacket. Weighing just 75 grams more, HEXBAND is ideal for bicycle lock-ups, back- or top-of-vehicle gear, construction equipment, and more. OTTOLOCK is designed for quick stops and protecting against opportunity theft. OTTOLOCK is not a replacement for a U-Lock. OTTO does not claim HEXBAND is unable to be cut. For maximum security, use a redundant locking method with both a U-Lock and a secondary lock. See Use Guidelines. - Extra tough: 6 layers of stainless steel provide added shear resistance. 2.5x steel thickness. - Lightweight: Starting weight only 190g. Lightweight, portable and easy to always carry. - Compact: Coils to a 3-inch diameter. Keep it in or around your saddle bag, backpack, in your pocket, or anywhere you want. - Durable: Chip-resistant Cerakote paint and Santoprene plastic that will not scuff or harm finishes. - Convenient: Keyless resettable combination. - Weight: 18" = 190g / 30" = 250g / 60" = 375g
$54.99 - $69.99
ADDITIONAL SECURITY Our popular ABUS frame lock adapter chain is now available with IvyTex technology.The innovative IvyTex cover is dirt and moisture repellent and even better: it helps to increase protection as the synthetic material slows the penetration of cutting tools. Underneath is a square profile chain made of hardened steel alloy. The chain can be connected to a number of ABUS frame locks and to the Alarmbox 2.0. It serves as additional security, for example to chain the bike to a fixed object with a pre-assembled frame lock. An additional key is not necessary for the plug-in chain. The key of the spoke lock opens and locks both components.The IvyTex connection chain is available in different lengths, chain link thicknesses and even colors. We have the right adapter chain for every city bike. Use and application: To secure the bike to a fixed object in combination with a frame lock or the Alarmbox 2.0 Technology and equipment: - Connection chain with IvyTex coating - Square profile chain made from our own hardened steel alloy - Durable IvyTex synthetic fiber shell offers resistance to sawing attacks - Hydrophobic IvyTex cover repels dirt and moisture - 6 & 8 mm hardened steel square chain - Fabric covering of the loop ring to protect against damage to the paintwork - With frame locks, there is no need to lock the shackle separately - Various connection options to fixed objects or several bicycles - Suitable for ABUS frame locks and alarm box 2.0
$59.99
The Ultra Mini 410 U-Lock is compact and combines high-quality materials with intelligent locking technology. What features does it have to protect against theft? A 12mm thick rounded shackle which is made of specially hardened steel – just like the body and structural parts of the locking mechanism. Combined with a high-quality locking cylinder which offers superb protection against tampering such as picking thanks to "double locking," the Ultra Mini 410 U-Lock is a reliable companion when you are out on your high-end bicycle. The lock passed the ice spray test with flying colors. Technology: - Hardened 15/32" round shackle - The shackle, body and the structural parts of the locking mechanism are made of specially hardened steel - The special, modern design of the lock body casing allows for optimum handling - High-quality locking cylinder for a high level of protection against tampering, e.g. picking Operation and use: - Good protection at medium theft risk - Recommended for securing good bicycles - The longer the shackle, the easier the bicycle can be locked to a fixed object
$79.99 - $89.99
The dimensionally stable Goose Lock chain lock features a unique housing design, soft-touch coating and specially hardened steel. For the good feeling of security and a special feel. With the Goose Lock, ABUS has developed a dimensionally stable bike lock that is also highly appealing to the eye and to the touch and features impressive colouring and design technology. It is made up of several components: the classic 6-millimetre steel chain, the gooseneck, the foam cover and a coating made of plastic fibres. The steel chain – like the housing and structural parts of the locking mechanism – is manufactured from specially hardened steel. The term "gooseneck" refers to two metal spiral springs wound together that ensure the dimensional stability of the lock. This allows the lock to be bent into the desired shape and wrapped tightly around the bicycle frame. The foam ensures the unmistakable feel of the lock and rattle-free transport. Excellent protection against abrasion and scratches is provided by the durable, highly flexible coating made of plastic fibres. Thanks to the dimensional stability and the foam, it is very easy to transport the lock. It does not rattle on the bike frame, yet still remains flexible. It is available in different colours - for an individual colour statement to match any bike. - 6mm chain with functional, durable and highly flexible textile fibre sheathing - The chain, housing and structural parts of the locking mechanism are made of hardened steel - Won't rattle in transport thanks to dimensional stability
$74.99 - $79.99
A Material That Offers Resistance The concept that the IvyTex technology is based on has already been in use for several years in industrial applications in areas subjected to high wear, where moving parts have to be protected against wear and tear. ABUS has taken advantage of this concept by using it in the sleeves for its chain locks. The effect of this is twofold: it provides protection against wear and tear, as well as preventing the chain from causing damage to the bicycle. IvyTex technology has many other benefits aside from its durability. The hi-tech fabric is also highly flexible as well as weatherproof and resistant to liquids. This prevents water from being absorbed by the fabric, thereby protecting the locks against corrosion. Its durability also means that there's no excuse for not securing your bicycle, even if the weather is bad and you worry about the lock getting dirty. - 7mm square chain with functional, long-lasting, and highly-flexible mesh sleeve to prevent damage to the bicycle's paint - The sleeve offers very high protection against abrasion and does not absorb any liquids, e.g. water or oil - The chain, the case, and supporting elements of the locking mechanism are made of specially hardened steel
$54.99
ABUS' Pro Tectic 4960 Chain provides an additional layer of security when using the Pro Tectic 4960 Frame Lock (sold separately). Patented "push n' lock" technology makes using this accessory chain a snap, no separate closing of the shackle is necessary, and your bike can be easily secured to a fixed object. The 6mm chain is made of special hardened steel. This chain cannot lock to itself, only to the Pro Tectic 4960 Frame Lock. - Mechanism Type: Key - Diameter: 6 mm - Shackle Shape: None - Length: 85 cm/100 cm - For use with the ABUS Pro Tectic 4960 Frame Lock
$103.95
Developed with feedback from New York City bike messengers, the Messenger Mini+ helps you lock more and carry less. Its 7/10 security rating makes it a perfect lock for quick stops in metropolitan areas and college campuses and longer stops in rural and suburban areas. The wheel extender can secure either the front or back wheel while the Mini captures your frame and the immovable object you lock it to. It comes with two stainless steel keys with convenient coiled wrist key chains. Specifications & Features: - 11mm hardened MAX-PERFORMANCE STEEL SHACKLE provides lighter weight lock while maintaining the security level of Messenger Minis - WHEEL EXTENDER can secure either the front or back wheel while the Mini captures your frame and the immovable object - INCREASED SHACKLE DIMENSIONS allows for a wider range of lock up scenarios - NEW patent pending BENTFOOT DOUBLE DEADBOLT DESIGN - REINFORCED CUFF over crossbar and cylinder for additional security - HIGHER SECURITY DISC-STYLE CYLINDER is pick and drill resistant - NEW ROTATING DUST COVER with stopper plug - 2 STAINLESS STEEL KEYS with coiled wrist key chains - Key Safe Program - Product dimensions: 3.75” x 6.5” (9.5cm x 16.5cm) - Wheel extender: 3.25" x 3.75" (8.3cm x 9.5cm) - Product weight: 2.60 lbs (1.18 kgs)
$81.95
- End link locking point for extensive holding power - 4-sided 3t manganese steel chain links - 5 digit resettable combination over 100,000 codes - Patent pending lock head design - Combo Safe Program - Product dimensions: Length 90cm - Product weight: 5.85 lbs
$81.95
Kryptonite's KryptoLok Series 2 995 Integrated Chain is a 9mm-thick, four-sided link chain made of triple-heat-treated manganese steel for serious strength. Its integrated high-security lock cylinder is pick, drill, and cut resistant. This 37.5-inch chain is covered with a weather-resistant nylon sleeve that protects your bike's finish. Plus, the KryptoLok Series 2 has an anti-theft protection offer.
$64.99 - $84.99
The Ultimate 420 radiates a feeling of security through its appearance alone. There are locks and then there is the Ultimate 420. If you are looking for a shackle lock that will deter potential thieves just by looking at it, then you don't have to look far. Thirteen millimeters of hardened special steel and aggressive coloring make it immediately clear to any bicycle thief that they have no chance here. At the same time, the Ultimate 420 is so compact that you can easily stow it away. It finds its place in every backpack and bag and is therefore always with you when you need to secure your valuable bicycle. Technology: - Hardened 13mm round bracket - The shackle, housing, and supporting parts of the locking mechanism are made of specially hardened steel - Special, modern design of the lock body sheathing enables optimum handling - High-quality locking cylinder for high protection against manipulation, e.g. picking Operation and use: - Good protection at medium theft risk - Recommended for securing good bicycles - The longer the shackle, the easier the bicycle can be locked to a fixed object
$79.99
At just 440g, the BORDO Lite 6055C Mini is a lightweight lock that offers the perfect security-to-weight ratio. Due to its small size, the BORDO Lite Mini easily fits into jersey pockets. Alternatively, you can use the included SH Bracket, which allows you to carry the lock underneath your saddle to save space in your jersey pocket or on the bike frame. And, thanks to the individually configurable digit code, you no longer have to take an additional key with you during bike rides. - Special steel design with color-coordinated plastic casing to prevent damage to the bike's paint - The bars and housing are manufactured using particularly lightweight materials and steel alloys - Bars connected with special rivets - Two-component number tumblers guarantee long-term readability of the digits - Individually configurable code - Perfect security-weight ratio - Includes SH Bracket
$54.99 - $64.99
A Material That Offers Resistance The concept that the IvyTex technology is based on has already been in use for several years in industrial applications in areas subjected to high wear, where moving parts have to be protected against wear and tear. ABUS has taken advantage of this concept by using it in the sleeves for its chain locks. The effect of this is twofold: it provides protection against wear and tear, and it prevents the chain from causing damage to the bicycle. IvyTex technology has many other benefits aside from its durability. The hi-tech fabric is highly flexible, weatherproof, and resistant to liquids. This prevents water from being absorbed by the fabric, thereby protecting the locks against corrosion. Its durability also means that there's no excuse for not securing your bicycle, even if the weather is bad and you worry about the lock getting dirty. - 6mm square chain with functional, long-lasting, and highly-flexible mesh sleeve to prevent damage to the bicycle's paint - The sleeve offers very high protection against abrasion and does not absorb any liquids, e.g. water or oil - The chain, the case, and supporting elements of the locking mechanism are made of specially hardened steel
$64.95
OnGuard's Akita cable lock provides years of sturdy, reliable protection. This lock comes in several different cable widths, offering various levels of security. All are easy to use and tough. Plus, they all boast OnGuard's X2 double-bolt locking mechanism and come with five laser-cut keys, including one Microlight key with a built-in light.
$64.99 - $69.99
-5 mm bars with a core of light steel and synthetic coating to prevent damage to the bicycle‘s paintwork -The bars and the lock body are made of particularly light materials and ferrous alloy -Bars are linked with special rivets -Premium automatic cylinder -The Bordo Lite Mini fits perfectly into jersey pocket
$86.95
Specifications & Features: - 7/10 security rating - 13MM HARDENED MAX-PERFORMANCE STEEL SHACKLE resists bolt cutters and leverage attacks - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist attacks - NEW SLIDING DUSTCOVER - NEW DOUBLE DEADBOLT DESIGN - HIGHER SECURITY DISC-STYLE CYLINDER is pick and drill resistant. - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - 3 STAINLESS STEEL KEYS — including new key design and one LED REPLACEABLE KEY FOB - Protective vinyl coating - Key Safe Program - Product dimensions: 3.25” x 5.5” (8.3cm x 14cm) - Product weight: 2.65 lbs (1.20 kgs)
$59.00 - $95.00
- The ideal solution to bicycle wheel theft - Includes a front and rear wheel locking skewer, with each lock operated using a unique multi combination key, to ensure the security of your wheels at a fraction of their replacement cost
$59.95
- Defender ring lock with E-bike battery lock - The ring lock has maximum security with plug in option - Hardened steel bracket and lock housing - Anti drilling plate in cylinder - Online key service - 720 grams/181 grams
$59.95
- End link locking point for extensive holding power - 4-sided 3t manganese steel chain links - 4 digit resettable combination over 10,000 codes - Patent pending lock head design - Combo Safe Program - Product dimensions: Length 90cm - Product weight: 3.75 lbs
$91.95
- 3mm hardened steel links for moderate security lockups - Includes easy to install transport bracket for hassle free transportation - Easy to use dials with highly visible digits that provide a high level of ergonomics - Compact and easy transport - Product dimensions: Length 85cm - Product weight: 2.18 lbs
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