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Vendor:John Deere
John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers
Regular price $ 30.59 USDRegular priceUnit price perSale price $ 30.59 USD
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Vendor:John Deere
John Deere M154621 Deck Belt for 42" Deck X300 Series
Regular price $ 65.90 USDRegular priceUnit price perSale price $ 65.90 USD
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Vendor:Honda
Honda Original Equipment V-Belt (3L-39.2) - 22431-VR8-N03
Regular price $ 9.41 USDRegular priceUnit price perSale price $ 9.41 USD
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Vendor:John Deere
John Deere Original Equipment Flat Belt (GX20006) - UC30568
Regular price $ 22.76 USDRegular priceUnit price perSale price $ 22.76 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt - GX21833
Regular price $ 46.16 USDRegular priceUnit price perSale price $ 46.16 USD
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Vendor:John Deere
John Deere M82462 Secondary Blade-to-Blade Deck Drive Belt
Regular price $ 22.18 USDRegular priceUnit price perSale price $ 22.18 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt - M143019
Regular price $ 43.36 USDRegular priceUnit price perSale price $ 43.36 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt #M126536
Regular price $ 43.35 USDRegular priceUnit price perSale price $ 43.35 USD
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Vendor:John Deere
John Deere Original Equipment Transmission Drive Belt - GX22036
Regular price $ 34.56 USDRegular priceUnit price perSale price $ 34.56 USD
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Vendor:John Deere
John Deere Original Equipment Flat Belt - GX20072
Regular price $ 40.81 USDRegular priceUnit price perSale price $ 40.81 USD
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Vendor:John Deere
John Deere M88184 Belt Fits STX38 with YELLOW Deck
Regular price $ 23.55 USDRegular priceUnit price perSale price $ 23.55 USD
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Vendor:A&I Products
Replacement Belt for MTD / Cub Cadet # 754-3055 - A-7543055
Regular price $ 24.34 USDRegular priceUnit price perSale price $ 24.34 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt - M174506
Regular price $ 35.70 USDRegular priceUnit price perSale price $ 35.70 USD
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Vendor:John Deere
John Deere GX20305 Deck Drive Belt for 48" Deck
Regular price $ 43.57 USDRegular priceUnit price perSale price $ 43.57 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt - M155452
Regular price $ 37.59 USDRegular priceUnit price perSale price $ 37.59 USD
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Vendor:John Deere
John Deere M77988 Primary Deck Drive Belt for 38" Deck
Regular price $ 24.37 USDRegular priceUnit price perSale price $ 24.37 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt (M172924) - M154897
Regular price $ 43.42 USDRegular priceUnit price perSale price $ 43.42 USD
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Vendor:A&I
A&I Deck Belt - B1532405143
Regular price $ 2.25 USDRegular priceUnit price perSale price $ 2.25 USD
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Vendor:John Deere
John Deere Original Equipment V-Belt (M149970) - M174506
Regular price $ 35.70 USDRegular priceUnit price perSale price $ 35.70 USD
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Vendor:Honda
Honda 22431-VG3-D50 V-Belt (3L-33.3) - 22431-VG3-D50,1
Regular price $ 4.31 USDRegular priceUnit price perSale price $ 4.31 USD
Frequently Asked Questions
How to determine lawn mower belt size?
The best way to figure out the lawn mower belt size is to start with the mower’s model number and the OEM part listing, then confirm whether it’s a deck belt or drive belt, since the routing changes length. If you’re measuring, remove the belt and measure total length, then note width and profile. Also, inspect pulleys and idlers, since wear can mimic a “wrong size” belt.
What is the best type of belt for a lawn mower?
The best type of belt for your lawn mower is the one that matches the original specs, width, and construction. Heavy-use belts with reinforced cords can resist stretching, while standard wrapped belts work well for routine mowing. For outdoor power equipment, correct fit and proper tension matter more than marketing. Replace worn idlers or pulleys at the same time.
What size belt do you need for a 42-inch mower deck?
For a 42-inch mower deck, you'll typically need a 1/2-inch wide deck belt, but the length varies. Belt length depends on brand, pulley layout, and if the deck uses an engagement idler or fixed routing. Use your model number to match the correct belt in the parts list, then compare it to the belt you’re replacing.
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