GELASKA Idler Pulley Kit for John Deere 100-Series — 2x GY22172 + GY20629, Aluminum Alloy, Includes M10 Nuts

GELASKA replacement kit includes two GY22172 flat idler pulleys and one larger GY20629 idler pulley engineered to restore smooth belt routing and reduce deck vibration on compatible John Deere lawn tractors.

When a deck starts rattling, belts slip, or you hear worn bearings, the idler pulleys are often the source. This GELASKA kit supplies the exact-size pulleys and three M10 flanged nylon lock nuts to replace worn originals on many 100-series John Deere and compatible Scotts tractors. Made from aluminum alloy, the parts aim to resist corrosion and provide a precise fit so you can get the mower back to dependable cutting performance.

Which machines will these pulleys fit?

These pulleys are specified to match common John Deere part numbers and fit a wide range of 100-series tractors and related Scotts models. Check your original part numbers (such as GY22172, GY20629, GY22082, GY20110, AUC17621) or compare pulley diameters before ordering.

• Compatible models include John Deere D140, D155, D160, E140, E150, E160, E170, L120, L130, LA145, LA165, S140, S160, S170, X165, X166, X167 and other 100-series tractors.
• Also fits select Scotts/Lawn-Boy models that accept the same part numbers and sizes.
• Compare IDs and ODs: GY22172 — ID 0.66 in, OD 3.62 in, height 1.14 in; GY20629 — ID 0.66 in, OD 5.25 in, height 1.67 in.

How do these pulleys improve mower performance?

Replacing worn idler pulleys reduces belt slip, lowers noise, and steadies the cutting deck. New bearings and true pulley diameters keep belts aligned, which improves the cutting consistency and can prolong belt life.

• Restores correct belt tension and alignment for cleaner, more even mowing.
• Aluminum alloy construction helps resist rust and deformation under normal use.
• Includes three M10 flanged nylon lock nuts for secure reinstallation.

What exactly comes in the GELASKA kit and what are the dimensions?

The kit bundles two smaller flat pulleys (GY22172) and one larger idler (GY20629), plus mounting hardware so you have what’s needed for a typical deck replacement. Dimensions are provided to confirm compatibility before purchase.

• Contents: 2 x GY22172 pulleys, 1 x GY20629 pulley, 3 x M10 flanged nylon lock nuts.
• GY22172 size — inner diameter 0.66"; outer diameter 3.62"; height 1.14".
• GY20629 size — inner diameter 0.66"; outer diameter 5.25"; height 1.67".

Are these pulleys durable and easy to install?

GELASKA manufactures these pulleys from aluminum alloy to offer a balance of strength and corrosion resistance. Installation follows standard deck disassembly steps; most homeowners familiar with mower maintenance can complete the swap with basic hand tools.

• Aluminum alloy construction for corrosion protection and dimensional stability.
• Comes with flanged lock nuts to secure pulleys and resist loosening in vibration-prone applications.
• Fits standard shaft sizes (0.66" ID) used in the specified John Deere and compatible models.

Who is this for: This kit is aimed at homeowners or service technicians restoring deck performance on John Deere 100-series and compatible Scotts tractors. If your mower shows belt misalignment, excess deck vibration, or noisy bearings, this replacement kit supplies the pulleys and hardware needed to get the deck running smoothly again. Always verify part numbers and pulley measurements against your machine before ordering to ensure an accurate fit.