Lightweight black aluminum alloy u-lock

Updated 2026-09-05

The Soloist Sport Si is engineered for cyclists who prioritize weight without sacrificing security. Constructed from high-grade aluminum alloy, this u-lock provides a sturdy physical barrier while remaining significantly lighter than traditional steel alternatives. Its compact dimensions make it an ideal choice for urban commuters who need to secure their frame to standard bike racks.

Security is managed by a 14mm shackle and a high-security dimple key mechanism. This design offers better resistance against picking compared to standard serrated keys. The black finish provides a sleek, low-profile aesthetic that blends well with modern bicycle frames. The package includes three keys, ensuring you have reliable backups for long-term daily use.

This model is particularly effective for road bikes and fixed-gear bicycles where every gram counts. The silicon-coated body helps protect your bike's paintwork from scratches during locking and unlocking. Its 73 by 140mm internal clearance is specifically tailored for tight fits, reducing the leverage points available to potential thieves in high-traffic city environments.

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