The Best Idler Pulley Size Chart of 2025 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Idler Pulley Size Chart of 2025. Check our ranking below.

2,324 Reviews Scanned

Rank No. #1

ACDelco Gold 38001 (88909582) Idler Pulley

Helps keep the drive belt properly aligned and routed.Material:steel
Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Premium aftermarket replacement part
Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

Rank No. #2

2-Pack 179114 Flat Idler Pulley Replacement for Hus qvarna, C Raftsman, Pou LAN Riding Mower - Replaces OEM Parts 532179114, 532194327, 539110311, 592855201, 12644

【Exact OEM Replacement】Direct replacement for primary part numbers 179114, 532179114, 532194327, 539110311, and 592855201. Also interchangeable with AYP/C raftsman/Hus qvarna/Pou lan 5321791-14, 532-179114, 532194326 (when paired), 12644, 280-934, 13-12644, and 78-056. Please verify your original deck pulley part number before ordering to ensure a perfect fit.
【Broad Mower Compatibility】This flat idler pulley is fully compatible with C raftsman lawn tractor models including LT1000, LT2000, 917.275820; Compatible with Hus qvarna mower models YTH1848XP, YTH1542XP, YTH2148, YTH2448, LT1538, LTH1742, YTH1842; Compatible with Pou lan Pro riding mowers HD17542, PD17542LT, PO17542LT, PO19542LT, PO16542LT, PO17542LTX, PR20PH42STA; Also fits for R yobi HDK19H42.
【Optimize Belt Performance】The 179114 / 532194327 idler pulley is designed to ensure the smooth movement of belts within your mower deck. It effectively applies tension to the ground drive belt, reducing wear and tear while allowing the mower blades and drive system to turn efficiently and safely.
【Premium Quality & Specs】 Includes 2 x Ground Drive Fixed Idler Pulleys. Dimensions: 3.5" OD (Outer Diameter), 3/8" (0.375") ID (Inner Diameter), 1" Height. Constructed from heavy-duty, lightweight plastic with pre-greased steel bearings for sturdy, smooth-running, and long-lasting performance under tough mowing conditions.
【Easy to Install】 Save time and money with easy maintenance. Simply align the idler arm on the shoulder washer, slide the pulley washer onto the mounting bolt, slide on the tension pulley, and tighten the nut securely with wrenches. Pull down on the 179114 pulley arm to help hold the bolt in place during tightening.

Rank No. #3

POSEAGLE GY22172 Idler Pulley with GY20629 Idler Pulley Replaces AUC17621 GY22082 GY20067 GY20110 for John Deere D140 D130 D110 L130 L120 L110 L100 LA145 LA115 LA105 LA130 Z225 E140 Lawn Tractors

REPLACES: GY22172 Idler Pulley Replaces John Deere GY22172, GY20067; Size of GY22172 Idler Pulley: Height 1.13 inch, ID 0.68 inch, OD 3.62 inch
REPLACES: GY20629 Idler Pulley Replaces John Deere GY20629, GY20110, AUC17621, GY22082; Size of GY20629 Idler Pulley: Height 1.68 inch, ID 0.66 inch, OD 5.23 inch
HARDWARE KIT: This Hardware Kit Includes 2xM10 Flanged Nylon Nut
PREMIUM HEAVY DUTY BUILD: Crafted from high-quality steel for superior resistance to wear, corrosion and impact, engineered to hold up seamlessly in all harsh mowing conditions—including wet grass, uneven terrain, overgrown brush, muddy yards and rocky lawn areas
RELIABLE PERFORMANCE GUARANTEE: Precision-machined for smooth operation, minimizing vibration and effectively reducing belt slippage, fraying and premature wear. This precision engineering protects your mower’s deck system, drive components and belts from unnecessary strain, ensuring your lawn tractor operates at peak efficiency with every use

Rank No. #4

Antanekr 173437 532173437 Flat Idler Pulley for Craftsman Lawn Mower Tractor, Mower Pulley Fits Husqvarna Poulan 42” 44” Deck Replace 131494 532131494 173438 165888 LT16542 LT18452 LTH1342 LTH1542

Exact OEM Replacement - Premium flat idler pulley designed to perfectly replace multiple OEM parts for Husqvarna, Poulan, AYP, and Craftsman mowers. Directly replaces part numbers 173437, 131494, 165888, 532104360, 532131494, 155191104360x, 532173437, 532165888, 173438, 173434, and 532173434. Restore your equipment’s performance with this reliable pulley pro alternative
Broad Husqvarna Compatibility - Fits Husqvarna models perfectly, including: LT16542, LT18452, LTH1342, LTH1542, LTH1742, LTH18542, LTH2042, YTH130, YTH1342XP, YTH1542, YTH1842, YTH1848, YTH18542, YTH2042, YTH2048, YTH2242, ytkh1542xp, LTH1342B, and LTH1342C
Extended Series Fit & Easy Install - Built to exact standards for extended Husqvarna variations, including: YTH1342XPA, YTH1542A, YTH1542B, YTH1542C, YTH1542D, YTH1542E, YTH1542XP, YTH1542XPC, YTH1542XPE, YTH1542XPG, YTH1542XPT, YTH1842XPB, YTH2048A, YTH2242A, YTH2242B, YTKH1542XPA, and YTH1542XPB. Quick and straightforward installation gets your mower back on the grass in no time
Dedicated Craftsman Fitment - The ideal craftsman idler pulley for your 42/44 inch deck. Fully compatible with Craftsman models LT1000 and LT2000 (Specifically for 917.287050, 917.288070). It functions flawlessly as a dependable lawn mower flat pulley, while also cross-referencing with niche part requirements
Precise Dimensions & High Efficiency - Features standard dimensions: 1-1/8" Height, 3-7/8" Outer Diameter, and 3/8" Inner Diameter. Acting as a heavy-duty engine pulley equivalent, it is engineered to reduce friction, streamline your lawn care routine, maximize efficiency, and minimize downtime

Rank No. #5

Gates 36299 Idler Pulley

Steel and thermoplastic construction designed to tight manufacturing tolerances for high durability and quality performance
Built to last with a superior resistance to dirt, salt, chemicals and other under-hood contaminants
OE-quality fit for virtually every domestic or import vehicle on the road today
Bearings meet or exceed OE standards with application-specific speed and load requirements, to withstand high under hood temperatures

Last update on 2025-08-02 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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Is it worth buying an Idler Pulley Size Chart?
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Brand Value: Every brand of Idler Pulley Size Chart has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an Idler Pulley Size Chart?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Idler Pulley Size Chart.
Customer Ratings: Number ratings grade Idler Pulley Size Chart objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Idler Pulley Size Chart.
Product Quality: You don’t always get what you pay for with an Idler Pulley Size Chart, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Idler Pulley Size Chart is should be an indication of how long it will work out for you.

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FAQ:

Q: Is idler pulley the same as the tensioner pulley?

A: The idler pulley and the pulley on the tensioner are the same. They also use the same bearing which is replaceable and at a much reduced price. You should replace both bearings.

Q: What are the symptoms of an idler pulley?

A: Symptoms of a Bad or Failing Idler Pulley Visibly worn pulleys One of the first symptoms of an issue with an idler pulley is visible wear on the pulley. … Belt squealing Another common symptom of a possible issue with the idler pulley is squealing from the engine belts. … Damaged bearing or pulley

Q: What does the idler pulley actually do?

A: The idler pulley is one pulley in a set that drives the belt system of a vehicle. The idler pulley regulates the belts that connect to the crankshaft and are used to produce movement in numerous engine accessories, such as the alternator, steering pump and air-conditioner compressor.

Q: What is the function of the idler pulley on cars?

A: What Is the Function of an Idler Pulley? Function. The idler pulley is one pulley in a set that drives the belt system of a vehicle. … Design. The idler pulley consists of a pulley component called a sheave, or a wheel containing a groove that runs along its end. Wear. An idler pulley’s components experience wear over time. …