3-Pack Spindle Assembly for 54" Deck — Fits MTD / Cub Cadet / Troy Bilt XT1-ST54, XT1-GT54, ZT1-54, ST54, ZT2-54, TB2454, T8400, G8400, Z6660 — 618-06978 / 918-06978

Three spindle assemblies designed for 54" mower decks, compatible with MTD, Cub Cadet and Troy Bilt tractors including models XT1-ST54, XT1-GT54, ZT1-54, ST54, ZT2-54, TB2454, T8400, G8400 and Z6660. Each spindle has a height of 6 13/16" and a pulley outer diameter (OD) of 5 7/16". Supplied as a 3-pack and sold under part numbers 618-06978 and 918-06978, these units serve as direct replacements for lawn tractor parts and are built for reliable, long-lasting performance.