For bikers who leave nothing to chance, the ABUS Detecto RD SRA disc lock combines robust construction with active alarm technology. Its steel body and colorful plastic shell house a 13.5 mm locking bolt made of specially hardened steel, designed to withstand the most determined forced-entry attempts. ABUS SmartX technology detects the slightest vibration and triggers a powerful alarm, deterring theft before it even begins. SRA-approved and recommended for protecting high-end motorcycles, it stands out as a serious choice for very high-risk environments. Weighing 990 g, it remains portable for everyday use without compromising on strength.