Garden Parts [Lifetime Warranty] GX20072 Lawn Mower Deck Belt - Compatible with John Deere LA100 LA105 LA110 LA120 LA125 LA135 - Replaces John Deere GX20072 GY20570 42" Deck Sabre GX20072 Craftsman SPM215471655 | 1/2" x 104"
GX20072 lawn mower deck belt in branded packaging, 1/2 inch by 104 inch replacement for John Deere mowers.
GX20072 lawn mower deck belt shown in a promotional graphic with a riding mower in a residential yard.
GX20072 lawn mower deck belt specifications chart showing 1/2 inch width and 104 inch length dimensions.
GX20072 lawn mower deck belt compatibility and replacement part information chart with product image.
GX20072 lawn mower deck belt infographic showing aramid fiber construction and material features.
GX20072 lawn mower deck belt replacement for John Deere, shown with a riding mower and common repair symptoms.
BlueStars GX20072 lawn mower deck belt comparison chart showing aramid cord construction benefits.
BlueStars GX20072 lawn mower deck belt featuring heavy-duty, corrosion-resistant design for John Deere mowers.
GX20072 lawn mower deck belt installation checklist infographic showing belt maintenance tips for pulleys and springs.
GX20072 lawn mower deck belt in branded packaging, 1/2 inch by 104 inch replacement for John Deere mowers.
GX20072 lawn mower deck belt shown in a promotional graphic with a riding mower in a residential yard.
GX20072 lawn mower deck belt specifications chart showing 1/2 inch width and 104 inch length dimensions.
GX20072 lawn mower deck belt compatibility and replacement part information chart with product image.
GX20072 lawn mower deck belt infographic showing aramid fiber construction and material features.
GX20072 lawn mower deck belt replacement for John Deere, shown with a riding mower and common repair symptoms.
BlueStars GX20072 lawn mower deck belt comparison chart showing aramid cord construction benefits.
BlueStars GX20072 lawn mower deck belt featuring heavy-duty, corrosion-resistant design for John Deere mowers.
GX20072 lawn mower deck belt installation checklist infographic showing belt maintenance tips for pulleys and springs.
Lifetime Warranty

[Lifetime Warranty] GX20072 Lawn Mower Deck Belt - Compatible with John Deere LA100 LA105 LA110 LA120 LA125 LA135 - Replaces John Deere GX20072 GY20570 42" Deck Sabre GX20072 Craftsman SPM215471655 | 1/2" x 104"

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GX20072 Lawn Mower Deck Belt (1/2" x 104")

Key Features

  • Type: Mower Deck Drive Belt
  • Length: 103.875 in (2638 mm)
  • Width: 1/2 in (12.7 mm)
  • Construction: Aramid fiber-reinforced for enhanced durability and resistance to stretching
  • Function: Connects the engine pulley to the mower deck spindles to rotate the blades

Replaces / Cross-Reference Part Numbers

  • GX20072
  • GY20570
  • UC32283R
  • 175-919
  • 265-826
  • SPM215471655
  • 75-919

Compatibility & Fitment

  • Designed for many 42-inch John Deere mower decks.
  • Fits John Deere Models: 102, 105, 107S, 115, 125, D100, D105, D110, D120, D125, D130, E100, E110, E120, E130, L100, L105, L107, L108, L110, L111, L118, LA100, LA105, LA110, LA115, LA120, LA125, LA135, S100, S110, S120, S240, X105, X106, X107, X110, X120, X125, X126, X145.
  • Also fits Sabre models including 14.542GS and 17.542HS.
  • Note: Does not fit ZTrak models such as the Z315E. Always verify fitment with your owner's manual.

When to Replace

  • Visible signs of damage such as cracking, glazing, fraying, or splitting.
  • Belt slipping, causing inconsistent blade speed or an uneven cut.
  • Audible squealing from the deck during operation.
  • Scheduled replacement as recommended by the manufacturer's service interval.

Installation Tips

  • Disconnect the spark plug wire before performing any maintenance.
  • Lower the mower deck to its lowest position to relieve belt tension.
  • Document or photograph the belt's routing path around all pulleys before removal.
  • Ensure all pulleys are clean, free of debris, and spin freely.
  • Confirm the new belt is properly seated in all pulley grooves before re-engaging tension.
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  • EXACT REPLACEMENT

    EXACT REPLACEMENT

    Replace part number GY20570, GX20072, SPM215471655, 10436, 230-5026, 7-078275, B1JD90, 175-919, 75-919, 265-826
  • ARAMID FIBER CORD

    ARAMID FIBER CORD

    Made of high-quality Aramid fiber cord , along with chloroprene rubber & two-layer wrapping cover that can endure in harsh environment
  • SAVING SOLUTION

    SAVING SOLUTION

    Enjoy the great feeling when your mower is repaired and works like before - BlueStars brings DIY solutions to help you deal with any trouble
  • SIMPLE INSTALLATION

    SIMPLE INSTALLATION

    Because the lawn mower belt is a simple part, the installation just takes few minutes and will save you at least a hundred bucks in labor
RUGGED BUILT FOR LONG-LASTING DURABILITY

RUGGED BUILT FOR LONG-LASTING DURABILITY

BlueStars Lawn Mower Belt's sturdy appearance and construction ensure long-lasting durability
TWO-LAYER WRAPPING COVER

TWO-LAYER WRAPPING COVER

GX20072 Lawn Mower Belt layers can protect the belt construction , improve grip and resists abrasion
#1 SOURCE OF HIGH-QUALITY LAWNMOWER PARTS

#1 SOURCE OF HIGH-QUALITY LAWNMOWER PARTS

Enjoy your fresh garden with the support of our lawn mower replacement parts
Brand Model Number
Replaces Part Numbers John Deere: GX20072, GY20570, UC30567, Sabre: GX20072, GY20570, Husqvarna / Poulan / Craftsman / AYP / RedMax: SPM215471655, MTD / Cub Cadet / Troy-Bilt: 10436, 230-5026, 7-078275, B1JD90, Oregon: 175-919, 75-919, Stens: 265-826
John Deere 100 & D100 Series (42" Deck) 102 (Belt, Deck 42" & Belt, Edge Deck 42"), 105, 107S, 115 (Belt, Deck 42" & Belt, Edge Deck 42"), 125 (Belt, Deck 42" & Belt, Edge Deck 42"), 135, D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115, D117, D118, D119, D120, D121, D122, D123, D124, D125, D126, D127, D128, D129, D130
John Deere L Series (42" Deck) L100, L101, L102, L103, L104, L105, L106, L107, L108 (Belt, Deck 42" & Belt, 3N1 Deck 42"), L109, L110 (Belt, Deck 42" & Belt, 3N1 Deck 42"), L111, L112, L113, L114, L115, L116, L117, L118 (Belt, Deck 42" & Belt, 3N1 Deck 42"), L119, L120, L121, L122, L123, L124, L125
John Deere X Series & Special Models X120, X145, 108-14.5, 108-17HS, 14.542GS, 1642HS, 17.42HS, 17.542HS, 1742HS
Sabre & Scotts (John Deere Brands) Scotts L17.542 (2002), Scotts L1742, Sabre 1642HS, Sabre 17.542

FAQ

This belt is designed for 42-inch mower decks and is compatible with a wide range of John Deere models, including the D100, D105, D110, D120, D125, D130, E100, E110, E120, E130, L100, L110, L118, L130, L1742, LA100, LA105, LA110, LA115, LA120, LA125, LA135, S100, X105, X106, X110, X125, X126, and X145 series.
This belt serves as a direct replacement for John Deere OEM part numbers GX20072, GY20570, and UC32283R. It also cross-references with Craftsman part number SPM215471655.
You likely need a new belt if you notice the mower blades are not spinning at full speed, the mower is leaving uncut grass patches, or you hear a squealing noise when the deck is engaged. Additionally, if the belt shows visible signs of fraying, cracking, glazing on the sides, or has stretched to the point where the tensioner can no longer keep it tight, it should be replaced.
Replacing the deck belt is a standard maintenance task that typically takes 30 to 60 minutes. While it can be done with the deck on the mower, many find it easier to remove the mower deck entirely to gain better access to the pulleys. You will generally need basic hand tools, such as a socket set or wrench, to release the tensioner and guide the belt around the pulleys.
Yes. When replacing the belt, it is good practice to inspect the deck pulleys for smooth rotation and check the tensioner spring for proper resistance. If the pulleys have excessive play or do not spin freely, they may cause premature wear on your new belt. Also, clear any built-up grass or debris from the top of the deck, as this can cause the belt to run hot and fail prematurely.
The most common causes of belt failure include running the mower through tall, wet grass that bogs down the deck, debris buildup that creates friction, or misaligned pulleys. Additionally, if the belt tensioner is weak, the belt may slip under load, which generates excessive heat and leads to glazing or snapping.