{"product_id":"bosflag-john-deere-100-series-spindle-kit-2-pack-with-gx20367-pulley-1-2x103-belt-cnc-aluminum-direct-fit","title":"BOSFLAG John Deere 100 Series Spindle Kit 2-Pack with GX20367 Pulley \u0026 1\/2x103 Belt — CNC Aluminum, Direct-Fit","description":"\u003cp\u003e\u003cstrong\u003eThe BOSFLAG 2 Pack GY21098 Spindle kit includes two complete spindle assemblies, two GX20367 pulleys and one 1\/2\" x 103\" belt to restore cutting performance on compatible John Deere 100 Series mower decks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a direct-fit replacement for common John Deere part numbers, this kit supplies the most frequently worn deck components in one package. Each spindle assembly is precision-machined from high-grade aluminum alloy with steel grease zerks and quality fasteners, while the GX20367 pulley and the 1\/2\" x 103\" belt are sized to match factory specifications. The 2-pack layout makes it convenient for homeowners and technicians who service full mower decks or multiple machines.\u003c\/p\u003e\n\n\u003ch3\u003eHow will replacing these spindles and pulleys affect my mower's cutting quality?\u003c\/h3\u003e\n\u003cp\u003eWorn or damaged spindles and pulleys often cause uneven cuts, blade wobble, and accelerated blade wear. Installing fresh spindle assemblies and correctly sized pulleys restores smooth blade rotation, helping blades maintain the designed cutting plane and finish.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEliminates spindle play and reduces blade vibration.\u003c\/li\u003e\n  \u003cli\u003eRestores correct pulley alignment for belt tracking.\u003c\/li\u003e\n  \u003cli\u003eImproves deck balance to reduce scalping and striping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these parts fit my John Deere 100 Series tractor and how do they match OEM specs?\u003c\/h3\u003e\n\u003cp\u003eThis kit is made to replace commonly used John Deere numbers including AUC15811, GY20454, GY20867, and GY21098 for spindles, as well as GX20367 for pulleys and GX20072 for the belt. Dimensions are manufactured to match the original equipment so installation uses existing mounting points and hardware.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpindle compatible with John Deere 100 Series models listed in the product features.\u003c\/li\u003e\n  \u003cli\u003ePulley spec: height 0.83\"; inner diameter 0.58\"; outer diameter 7-1\/8\" to match OEM geometry.\u003c\/li\u003e\n  \u003cli\u003eBelt size: 1\/2\" width, 103\" length to replace GX20072.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and manufacturing details ensure long-term reliability?\u003c\/h3\u003e\n\u003cp\u003eThe spindles are CNC-machined from high-grade aluminum alloy for a balance of strength and weight, and fitted with steel grease zerks for regular lubrication. Fasteners and critical mating surfaces are engineered for repeatable torque and secure clamping to resist loosening under deck vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminum alloy spindle body for corrosion resistance and stiffness.\u003c\/li\u003e\n  \u003cli\u003eSteel grease zerks for easy maintenance and prolonged bearing life.\u003c\/li\u003e\n  \u003cli\u003ePrecision threading and high-strength screws for secure installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the 2-pack configuration save time and money?\u003c\/h3\u003e\n\u003cp\u003eBy providing two spindles and two pulleys plus the belt in one kit, you can service the entire mowing deck or keep a spare spindle on hand. This reduces downtime, avoids repetitive ordering, and often costs less than buying components separately.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete deck servicing in a single purchase.\u003c\/li\u003e\n  \u003cli\u003eLower per-part cost versus single-item ordering.\u003c\/li\u003e\n  \u003cli\u003eUseful for multi-tractor households or professional maintenance plans.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The BOSFLAG 2 Pack GY21098 kit is aimed at homeowners, landscapers, and small-fleet technicians who operate or maintain John Deere 100 Series tractors and need dependable OEM-style replacements. If you experience uneven mowing, blade vibration, or belt tracking issues, or if you perform routine deck overhauls, this kit supplies the matching spindles, pulleys, and belt to bring the deck back to factory-like function without custom modifications.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit fit John Deere 102 and 125 models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit fits many John Deere 100 Series models including 102 and 125; check your deck's part numbers against the replacements listed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the belt included and what size is it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The package includes one belt sized 1\/2\" width by 103\" length, replacing John Deere GX20072.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BOSFLAG","offers":[{"title":"Default Title","offer_id":56839296221524,"sku":"B0CLHX4F96","price":128.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/bosflag-front-assembly-packaging.jpg?v=1787066078","url":"https:\/\/gardenluxe.co.uk\/products\/bosflag-john-deere-100-series-spindle-kit-2-pack-with-gx20367-pulley-1-2x103-belt-cnc-aluminum-direct-fit","provider":"Gardenluxe Uk","version":"1.0","type":"link"}