Serfas Lock 5Ft X 20 Mm Cable Combo 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 6Ft of total length, enough to pass through frame, front wheel, and whatever permanent structure you a locking up to.