**Brief Introduction**
SDU11 heavy‑duty wide‑opening U‑lock is defined by its enlarged shackle clearance. Many ordinary U‑locks feature narrow openings insufficient for securing bikes together with thick lampposts or parking bollards. SDU11 expands inner shackle dimensions to lock bicycles alongside large‑diameter fixed posts. Its thick heavy‑duty quenched alloy‑steel shackle and anti‑drill copper key cylinder meet mainstream European high‑security procurement benchmarks. A frame‑mount bracket is supplied as standard. It serves as a flagship heavy‑duty model targeting European and American high‑grade wholesalers and complete‑vehicle‑brand supporting projects.

**Material & Craftsmanship**
Wide‑opening thick quenched alloy‑steel shackle resisting shearing and hydraulic attacks. Anti‑drill precision copper key cylinder with multiple original spare keys. Wear‑resistant protective outer sleeve. Frame‑mount installation bracket included.

**Key Features**

1. Enlarged inner shackle clearance accommodates thick‑diameter posts and railings for expanded locking options.
2. Heavy‑duty thick alloy‑steel shackle achieves high security‑grade satisfying strict overseas security specifications.
3. Anti‑drill copper key‑cylinder defies tool‑drilling and technical picking attempts.
4. Frame‑mount bracket for convenient on‑bike storage during riding.
5. OEM‑ready for custom housing colors, laser‑engraved logos and color‑box packaging.

**Application Scenarios**
E‑bikes, high‑power electric bicycles and mountain bikes for European‑American markets where securing to thick fixed bollards is required.

**OEM & ODM Service**
Custom logos, housing colors and packaging. Relevant overseas‑market supporting documents can be provided for full‑container orders.