Serfas CL-20 Coiled Cable Combination Lock

5-Digit programmable combination lock and beefy 20mm thick twisted steel coiled cable, covered in a protective vinyl rubber to prevent frame scratches and rattling.

At 2.6 pounds, the CL-20 provides medium level protection with 4.5Ft of total length, enough to pass through frame, front wheel, and whatever permanent structure you a locking up to.