Idler Pulley 4.25 Inch Outer Diameter Fits Cub Cadet 50 Inch Deck LTX1040 RZT50 Mower Replacement Part Replaces 756-04129b 756-04129c 753-08171 956-04129 For MTD Troy Bilt
✔️ OD 4.84 in; flat 4.25 in; ID 0.38 in; height 1 in
This idler pulley replacement helps guide and tension the lawn mower belt on 42 to 54 inch deck models, including Cub Cadet, MTD, and Troy-Bilt lines. It is built to fit a wide range of 42 to 54 inch decks and works with the included hardware kit for easy installation.
✅ Outer Diameter (OD) 4.84 in
✅ Flat Outer-diameter 4.25 in
✅ Inner Diameter (ID) 0.38 in
✅ Height 1 in
✅ Hardware kit includes 3/8-16x1-3/4 in hex bolts, 3/8 in flat washer, 3/8-16 in nylon lock nuts
✅ Premium heavy duty steel construction resists wear and corrosion
💡 What is a long-tail question about lawn mower idler pulleys and how replacing it helps belt life?
This handy guide covers why replacing a worn idler pulley matters for belt life and deck performance.
belt life improvement
compatibility with Cub Cadet, MTD, Troy-Bilt deck systems
durable steel construction resists wear and corrosion
easy installation with included bolts, washers and nuts