The ULAC Eurostile Chain Lock in Yellow is a bright, high-visibility security solution that combines robust physical protection with a bold aesthetic. Part of the Neo Chain collection, it serves as a strong visual deterrent while its 5mm hardened steel links provide the cutting resistance needed for urban environments.
This Bumblebee Yellow model is identical in performance to the other Eurostile locks we've discussed, featuring a protective nylon sleeve to keep your frame pristine and a high-security key mechanism. The 100cm length offers the perfect balance of locking reach and portability for daily riders.
Induction-Hardened Steel: The 5mm chain links are heat-treated to resist cutting and tensile force attacks from common theft tools.
Integrated Dust Cover: Features a protective lid over the keyhole to keep out rain, grit, and road grime, ensuring the cylinder remains smooth over years of use.
Scratch-Free Nylon Sleeve: The high-quality yellow fabric jacket protects your bicycle's paint and dampens noise while riding.
100cm Flexibility: Long enough to easily secure your frame and wheel to a fixed object like a pole or bike rack.
High-Security Keys: Includes two dimple-style keys with up to 500 unique combinations to prevent picking attempts.
Compact Portability: Weighing approximately 545g, it easily wraps around your seatpost or top tube using the included Velcro strap.
| Feature | Specification |
| Chain Thickness | 5 mm |
| Total Length | 100 cm |
| Weight | ~545 g |
| Lock Type | High-Security Dimple Key |
| Colorway | Bumblebee Yellow |
Riders Seeking Visibility: The bright yellow sleeve makes the lock highly visible to you and potential thieves, acting as a strong "stay away" signal.
Urban Commuters: Ideal for those who need reliable daily security for coffee runs, office parking, or university campuses.
Key-Lock Fans: Perfect if you prefer the reassured physical turn of a key over a combination dial.
Maximum Security Situations: If you are leaving an expensive bike overnight in a high-theft area, you should consider a thicker 7mm Diesel Chain.
Keyless Preference: If you find carrying keys a hassle, the ULAC Street Fighter Combo in Yellow offers similar protection with a 4-digit combination.
Minimalist Weight Weenies: At 545g, it is light for a chain, but those looking for the absolute lightest café lock might prefer a thin cable or a small U-lock.
The Eurostile Yellow is not just about looks—the bright color makes it much easier to find your bike in a crowded rack or at night. To keep the yellow nylon sleeve looking fresh, you can clean it with a simple bicycle degreaser or soapy water if it picks up road spray or chain oil. Always ensure the dust lid is closed when the lock is not in use to maintain the internal pins.
