Custom gym cables are bespoke wire rope assemblies manufactured to fit non-standard cable lengths, end fittings, and pulley configurations on selectorized strength machines. Unlike off-the-shelf cables (typically 48-120 inches), custom cables accommodate unique machine geometries, stack heights, and cable routing paths. The core material is 7x19 aircraft cable (seven strands of 19 wires each) in diameters from 5/32″ (4 mm) to 1/4″ (6.4 mm), with breaking strengths from 2,000 to 4,000 lbs. End fittings include swaged (crimped) ball stops, threaded studs, eyelets, and clevis pins. For commercial gym maintenance, custom cables extend equipment life when original manufacturer parts are discontinued. Manufacturers require exact measurements: total length, end fitting types, and pulley groove dimensions. Nylon-coated cables reduce friction and noise but have shorter lifespan (12-18 months vs 24-36 months for bare galvanized). Buyers should request proof-load testing (125% of working load) and batch traceability. Custom turnaround times range from 5-15 business days plus shipping. Facilities should maintain spare custom cables for high-use machines (lat pulldowns, cable crossovers) to minimize downtime.