GX21833 John Deere 48 Inch Deck Belt Part Fit D140 D150 D160 E140 Z355E S140 D155 L120 L130 LA145 E150 E160 E170 LA130 LA140 LA155 LA165 S160 S170 X140 X165 X166 X167 Z255 GX20571 Lawn Mower

Compatible WithFor select mower-deck applications originally using GX21833, GX20571, 754-05008 or 954-05008 ONLY.Product Specifications:Length: 141.70" / 3599 mmTop Width: 0.55" / 12.7 mmMaterial: High-Strength Aramid Tensile CordsConstruction: Wear-Resistant Wrapped V-BeltApplication: Mower Deck Blade DriveDeck Applications: Select 48" and 50" mower decks depending on OEM configurationIMPORTANT: This is a mower-deck blade-drive belt designed to transfer power through the deck system to the cutting blades. It is NOT a hydrostatic belt, transmission belt, traction belt, ground-drive belt, or other belt used to propel the mower.Replacement / Cross-Reference Part NumbersJohn Deere:GX21833, GX20571Cub Cadet / MTD:754-05008, 954-05008Always compare the original OEM belt number before ordering. Similar-looking mower belts can have different lengths, widths, pulley routing and deck applications.John Deere Fitment MatrixFits select John Deere 48-inch mower-deck applications originally using GX21833 / GX20571.145:145 / PC9537155C:155C / PC9538D Series:D140 / PC10445D150 / PC10446D155 / PC12495D160 / PC10447E Series:E140 / PC13338E150 / PC13339E160 / PC13340E170 / PC13341L Series:L120 / PC9290L130 / PC9291LA Series:LA130 / PC9633LA140 / PC9634LA145 / PC9744LA155 / PC9745LA165 / PC9746S Series:S140 / PC13992S160 / PC13994S170 / PC13995X Series:X140 / PC9638X165 / PC10451X166 / PC13345X167 / PC13999Zero-Turn Applications:Z255 / PC11642Z355E / PC12789John Deere model names may be offered with different deck configurations depending on year and equipment package. Verify the original GX21833 / GX20571 belt number and mower-deck configuration before purchase.Toro TimeCutter Fitment MatrixFits select Toro TimeCutter mower-deck applications including:TimeCutter 5000TimeCutter 5000CTimeCutter MX 5000TimeCutter MX 5025TimeCutter MX 5050TimeCutter MX 5060TimeCutter MX 5075TimeCutter MX 5075TTimeCutter ZS 5000TimeCutter ZS 5000TFTimeCutter SS 5000TimeCutter SS 5035TimeCutter SS 5060TimeCutter MyRIDETimeCutter SWX 5000TimeCutter SWX 5050MR5075TCompatible Toro Model Numbers:74387, 74395, 74630, 74631, 74632, 74635, 74637, 74638, 74641, 74643, 74660, 74661, 74694, 74695, 74730, 74731, 74770, 74772, 74775, 74776, 74795, 74798, 75750, 75750TA, 75751, 75753, 75755, 75759, 75761TAToro TimeCutter model names were produced in multiple years and configurations. Do not order by the TimeCutter name or deck width alone. Verify the complete mower model number and original deck-belt specification.Exmark Quest Fitment MatrixFits select Exmark Quest mower-deck applications including:QSS708GEM50200QSS725GKC50200QT24KA501QTE691KA501QTE708GEM50200QTE735KC501QTS691KA502QTS708GEM50200QTS725GKC50200QZE725GKC50200QZS691CKA50200QZS708GEM50200Exmark Quest models may use different deck belts depending on deck size, production year, engine configuration and model number. Verify the complete equipment model number and original belt before ordering.Cub Cadet / MTD ApplicationsFits select Cub Cadet and MTD-built mower decks originally equipped with:754-05008954-05008These applications commonly use select 50-inch mower-deck configurations. The same 141.70-inch replacement belt may cross-reference to GX21833-series applications, but the mower deck itself may be a different size.Do not assume that every Cub Cadet or MTD 50-inch mower uses this belt. Verify the original 754-05008 / 954-05008 part number before purchase.Important Deck-Size NoticeDeck width alone does not determine belt compatibility.This replacement belt may be used on:Select John Deere 48-inch decks originally using GX21833 / GX20571Select Toro, Exmark, Cub Cadet and MTD 50-inch deck applications using the corresponding compatible belt configurationA 48-inch John Deere deck and a 50-inch Toro or MTD-built deck can use a similar replacement belt length because pulley location, spindle spacing, idler position, belt routing and deck geometry differ between mower platforms.Always use the original belt number and equipment model as the primary fitment reference.Important Fitment NotesMany mower model names were produced over multiple years with different deck sizes, pulley systems and drive-belt configurations. The mower brand, model-series name or deck width alone cannot guarantee fitment.Before ordering, please verify that:Your original mower-deck belt matches GX21833, GX20571, 754-05008, 954-05008 or the applicable compatible belt specification.The required belt measures approximately 0.55 inch in top width and 141.70 inches in length.You need the mower-deck blade-drive belt rather than a transmission or traction belt.Your mower model and deck configuration appear in the applicable fitment information.The complete equipment model number matches the correct production configuration.Do not measure only the outside circumference of a worn belt. Used belts may stretch, become distorted, lose material or break into sections, resulting in inaccurate measurements. The original OEM part number and equipment parts diagram are generally more reliable than measuring an old belt alone.Not Automatically Compatible WithThis belt is not designed for every John Deere, Toro, Exmark, Cub Cadet or MTD mower with a 48-inch or 50-inch deck.Not for:John Deere D110John Deere D130John Deere L110John Deere GX20072 applicationsJohn Deere GY20570 applicationsJohn Deere UC32283 applicationsMost John Deere 42-inch mower decksTransmission-drive belt applicationsHydrostatic drive beltsGround-drive or traction beltsUpper or lower transmission beltsMowers requiring a substantially different belt length or pulley-routing configurationDo not substitute this belt merely because another belt has a similar appearance or because the mower uses a 48-inch or 50-inch cutting deck.Installation NotesBefore removing the original belt, photograph or draw the existing belt-routing path. Remove the ignition key, disconnect the spark-plug wire when applicable, engage the parking brake and allow the engine and exhaust system to cool before servicing the mower.Inspect the spindle pulleys, idler pulleys, tension arm, tension spring, belt keepers, pulley grooves, bearings and deck alignment before installing the new belt. A seized bearing, damaged pulley groove, weak tension spring, bent belt guide or misaligned deck can cause slipping, overheating, fraying, edge wear or premature belt failure.The V-shaped sides of the belt should sit properly inside grooved pulleys. The wrapped back of the belt may contact smooth idler pulleys where specified by the mower's routing diagram. Make sure the belt passes inside all belt guides and keepers and follows the original routing path.Do not twist the belt during installation. Do not force it over pulleys with sharp tools, and do not apply oil, grease, lubricant or belt dressing.After installation, rotate the pulley system by hand where safe and practical to confirm that the belt remains seated correctly and does not cross, twist or rub against brackets or belt keepers.Reinstall all belt guards before operating the mower. During the initial test, engage the mower deck carefully and stop immediately if you notice smoke, abnormal noise, excessive vibration, unusual belt movement or tracking problems.Why Should You Choose Us?Quality ManufacturingConstructed with high-strength aramid tensile cords to help control stretching and maintain stable tension during repeated starts, stops, bending, pulley engagement and demanding mowing operation.The wear-resistant woven fabric wrap helps protect the belt against pulley friction, heat, grass clippings, dust and outdoor debris while supporting smooth engagement around deck pulleys and idlers.Its flexible yet reinforced construction is designed to maintain consistent blade-drive performance when the belt is correctly matched, routed, tensioned and installed. Stable power transfer helps support steady blade speed, reduced slipping, cleaner cutting and more dependable mowing performance throughout the season.After-Sales SupportYour purchase is backed by our lifetime warranty and responsive after-sales support. If you have questions about compatibility, belt routing, installation, slipping, squealing, abnormal noise, excessive vibration, tracking problems or premature wear, please contact us through Amazon.For faster assistance, please provide the complete mower model number, deck size, original belt number and clear photos of the mower identification label, original belt and pulley-routing system.Our support team will respond within 24 hours and help identify the possible cause while providing appropriate troubleshooting guidance, replacement assistance or warranty support.All brand names, model numbers, equipment names and OEM part numbers are used for compatibility identification only. This is an aftermarket replacement product.

• 【Recommended Replacement】 A worn mower deck belt can cause blade slipping, uneven cutting, squealing, vibration, reduced blade speed, or sudden belt failure. Replace your GX21833 deck belt when you notice cracks, frayed edges, glazing, stretching, or loss of tension. Built with high-strength aramid cords and a wear-resistant wrapped cover, this replacement belt is designed to handle repeated flexing, pulley friction, heat, dust, grass debris, and demanding mowing conditions. Helps restore smooth power transfer, stable blade rotation, and consistent cutting performance for a cleaner, more efficient mow.
• 【Quality Manufacturing】 Built for demanding mower-deck operation, this GX21833 / GX20571 replacement belt combines high-strength aramid tensile cords with a durable woven fabric outer wrap. The reinforced cord structure helps resist stretching and maintain stable tension, while the wrapped surface helps protect against abrasion, heat, dust, grass clippings, and repeated bending around deck pulleys and idlers. Its flexible yet tough construction promotes smooth engagement, reduced slipping, consistent blade speed, and dependable performance throughout demanding mowing seasons.
• 【Replacement Parts & Specifications】 Replacement / cross-reference for John Deere GX20571, GX21833; Cub Cadet / MTD 754-05008 and 954-05008. Belt dimensions: 0.55-inch width x 141.70-inch length. Designed as a mower-deck blade-drive belt for select compatible 48-inch and 50-inch deck applications, depending on the original equipment configuration. This is not a hydrostatic, transmission, traction, or ground-drive belt. For accurate fitment, always compare the original OEM belt number, mower model, and deck configuration before ordering rather than relying only on brand or deck width.
• 【John Deere Compatibility】 Fits select John Deere 48" deck models: 145 (PC9537), 155C (PC9538), D140 (PC10445), D150 (PC10446), D155 (PC12495), D160 (PC10447), E140 (PC13338), E150 (PC13339), E160 (PC13340), E170 (PC13341), L120 (PC9290), L130 (PC9291), LA130 (PC9633), LA140 (PC9634), LA145 (PC9744), LA155 (PC9745), LA165 (PC9746), S140 (PC13992), S160 (PC13994), S170 (PC13995), X140 (PC9638), X165 (PC10451), X166 (PC13345), X167 (PC13999), Z255 (PC11642), Z355E (PC12789). Verify GX21833 / GX20571 before purchase.
• 【Toro TimeCutter Compatibility】 Fits select Toro TimeCutter 5000, 5000C, MX5000, MX5025, MX5050, MX5060, MX5075, MX5075T, ZS5000, ZS5000TF, SS5000, SS5035, SS5060, MyRIDE, SWX5000, SWX5050 and MR5075T. Compatible model numbers include 74387, 74395, 74630, 74631, 74632, 74635, 74637, 74638, 74641, 74643, 74660, 74661, 74694, 74695, 74730, 74731, 74770, 74772, 74775, 74776, 74795, 74798, 75750, 75750TA, 75751, 75753, 75755, 75759 and 75761TA. Verify original belt number before ordering.
• 【Exmark, Cub Cadet & MTD Compatibility】 Fits select Exmark Quest models: QSS708GEM50200, QSS725GKC50200, QT24KA501, QTE691KA501, QTE708GEM50200, QTE735KC501, QTS691KA502, QTS708GEM50200, QTS725GKC50200, QZE725GKC50200, QZS691CKA50200 and QZS708GEM50200. Also fits select Cub Cadet / MTD deck applications originally using 754-05008 or 954-05008. Always confirm the original OEM belt number and deck configuration before purchase.
• 【Important Fitment Notice & Lifetime Support】 Brand and deck width alone do not guarantee fitment. Verify the OEM belt number, mower model, deck configuration, and 0.55" x 141.70" size before ordering. John Deere GX21833 applications are primarily select 48" decks, while 754-05008 / 954-05008 may use select 50" decks. Not for D110, D130, L110, GX20072 / GY20570 / UC32283, 42" decks, or transmission-drive applications. Inspect pulleys, idlers, belt keepers, tension springs, and routing before installation. Backed by our lifetime warranty and responsive after-sales support. Contact us through Amazon; our team will respond within 24 hours.