Flat Idler Pulley for GY22172 GY20067 John Deere L100 LA145 LA130 LA120 LA110 LA115 LA105 D140 D100 L110 L111 L118 D110 D105 D125 X145 D130 Fits 48" Deck Lawn Mowers (2 Pack)

What It Is

This is a flat idler pulley (2-pack) that guides and tensions the mower deck belt on 48-inch cutting decks used by John Deere lawn tractors. It replaces worn or seized pulleys to prevent belt slippage, noise, and uneven cutting.

Fitment & Compatibility

• Deck size: Fits only 48-inch (48") John Deere mower decks. Do not use on 42" or 54" decks without cross-checking.
• Models: Compatible with L100, LA145, LA130, LA120, LA110, LA115, LA105, D140, D100, L110, L111, L118, D110, D105, D125, X145, D130 series. Also fits some older LT and LX models with 48" decks.
• OEM reference: Replaces John Deere parts GY22172 and GY20067. Aftermarket part, not OEM.
• Check before buying: Measure the outer diameter (should be ~4"–4.5") and the center hole diameter (typically 5/8" or 3/4"). Ensure the bearing spins freely and the pulley is flat (not crowned) to match your belt type. Verify your deck’s spindle and idler arm spacing.

Key Things to Know

• Quality: Budget aftermarket set. Bearings are sealed but may have shorter lifespan than OEM. Inspect for burrs or rough edges before installing.
• Installation difficulty: Easy – remove belt, unbolt old pulley, bolt on new one. Use a socket wrench; no special tools needed.
• Common gotcha: The flat pulley design works only with flat belts. If your deck uses a V-belt, this pulley will cause slippage and rapid wear.
• Tip: Always replace both idlers at once if one is bad – the other is likely close to failing. Check belt condition and tensioner spring while you’re at it.

Should You Buy It

If you have a 48" John Deere deck with a flat belt and want a low-cost, functional replacement for worn idlers, this two-pack is a solid value. It’s not built for commercial use, but for occasional residential mowing it will get the job done. Double-check your deck size and belt type before ordering.