A practical choice for commuters, students and urban riders who want key-free, frame-friendly security for everyday stops.
The Street Fighter is a compact chain lock for everyday urban riding, commuting and short stops. Its 100 cm length gives you useful reach around a bike frame, seatpost and fixed parking structure, while the flexible chain is easy to wrap around the top tube or seatpost when you are on the move.
At its core is a 5 mm heat-treated hardened-steel chain, designed to resist cutting and tensile force. This is paired with a resettable combination mechanism, so you can set your own code and choose from up to 10,000 unique combinations without carrying or losing a key.
The high-quality nylon sleeve helps protect your paintwork from scratches, and the integrated ULAC Velcro strap keeps the lock neatly secured for transport. At 540 g, it is a sensible option when portability matters, while the 100 cm chain provides more flexibility than a compact rigid lock for typical café, campus and city parking situations. As with any compact everyday lock, choose a secure fixed object and match the lock to the risk level of where you leave your bike.
5 mm hardened-steel chain
Heat-treated steel links provide resistance against cutting and tensile force for everyday bike security.
100 cm locking length
The flexible chain gives you useful reach around your bike and a fixed urban structure.
Resettable combination
Set your own code and choose from up to 10,000 combinations without carrying a key.
Protective nylon sleeve
The sleeve helps prevent the chain from scratching your frame or seatpost during use.
Integrated Velcro storage
The included ULAC Velcro strap keeps the chain compact and easy to manage while riding.
Flexible transport options
Wrap the lock around the top tube or seatpost, or fold it into a backpack between stops.
Portable everyday format
At 540 g, it balances useful chain length with manageable weight for daily urban riding.
General
Materials & construction
Dimensions & weight
Features
What's included
Neo Chain
A compact chain-lock platform designed to balance everyday security with easy transport on your bike or in a backpack.
Heat-treated hardened steel chain
The hardened steel links provide resistance against cutting and tensile force.
Resettable combination mechanism
Set your own combination and choose from up to 10,000 unique combinations without carrying a key.
Nylon protective sleeve
The high-quality nylon sleeve helps prevent the chain from scratching your bike’s paintwork.
A bike lock is not just a bike lock.
ULAC is a Taiwanese bicycle-lock brand established in 1982. It began as an original equipment manufacturer producing high-security solutions for global industry leaders, then transitioned to an independent, consumer-focused brand in 2015 with the Si Works silicone lock collection.
ULAC develops security products through its in-house U-Lab research and development centre and operates its own manufacturing facility. Its work includes integrated alarm systems, NFC smart-lock technology and biometric authentication, alongside conventional bicycle-lock hardware and design-led products.
