{"product_id":"bosflag-gy20629-idler-pulley-2-pack-for-john-deere-cub-cadet-decks-5-23-od-includes-3-8-16-m10-lock-nuts","title":"BOSFLAG GY20629 Idler Pulley 2-Pack for John Deere \u0026 Cub Cadet Decks — 5.23\" OD, Includes 3\/8\"-16 + M10 Lock Nuts","description":"\u003cp\u003e\u003cstrong\u003eThe BOSFLAG 2-pack GY20629 idler pulleys are precision replacement pulleys designed to restore smooth belt tracking and reliable deck operation on compatible John Deere and Cub Cadet lawn tractors.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese aftermarket idler pulleys match critical dimensions and include two lock-nut options to simplify installation across a wide range of mower deck setups. Machined bearing seats and a balanced wheel profile help reduce vibration and promote consistent belt tension, making these pulleys a practical option for routine deck maintenance or mid-season repairs.\u003c\/p\u003e\n\n\u003ch3\u003eWill these pulleys fit my John Deere or Cub Cadet mower?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the BOSFLAG GY20629 pulleys are made to fit many common John Deere and Cub Cadet models by matching the original equipment dimensions and mounting hardware requirements. Check the pulley height, outer diameter, and inner bore against your existing part to confirm compatibility.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with multiple John Deere series (e.g., D100, X100, LA, and Z-series models).\u003c\/li\u003e\n  \u003cli\u003eWorks with Cub Cadet models including XT1, XT2, RZT and similar decks.\u003c\/li\u003e\n  \u003cli\u003eCompare dimensions: height 1.67\" • OD 5.23\" • ID 0.66\" to your existing pulley.\u003c\/li\u003e\n  \u003cli\u003eIncludes 3\/8\"-16 and M10 flanged nylon lock nut options for different mounting studs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the pulley design affect mower deck performance?\u003c\/h3\u003e\n\n\u003cp\u003eProperly sized and balanced idler pulleys keep the belt aligned and under consistent tension, which reduces slippage and uneven wear on blades and belts. BOSFLAG pulleys have precision-machined surfaces to support steady rotation and minimize vibration during normal mowing conditions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBalanced wheel profile cuts vibration and belt chatter.\u003c\/li\u003e\n  \u003cli\u003eMachined bearing seat for smooth rotation and less heat buildup.\u003c\/li\u003e\n  \u003cli\u003eDurable outer surface sustains consistent belt contact area.\u003c\/li\u003e\n  \u003cli\u003eTwo lock-nut choices secure the pulley to common stud sizes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact dimensions and included hardware?\u003c\/h3\u003e\n\n\u003cp\u003eKnowing the pulley measurements speeds up verification and helps avoid returns. The BOSFLAG GY20629 pulleys are specified to match common OEM sizes so they install without modification on the listed tractors.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePulley height: 1.67 inches.\u003c\/li\u003e\n  \u003cli\u003eOuter diameter (OD): 5.23 inches.\u003c\/li\u003e\n  \u003cli\u003eInner diameter (ID\/bore): 0.66 inches.\u003c\/li\u003e\n  \u003cli\u003eHardware: includes both 3\/8\"-16 flanged nylon lock nut and M10 flanged nylon lock nut.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I check during replacement?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation is straightforward for anyone familiar with basic mower maintenance; most pulleys are swapped with simple hand tools. Before final reassembly, inspect the belt for cracks, check spindle studs for straightness, and confirm the new pulley spins freely without wobble.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRemove old pulley and clean mounting area of debris and rust.\u003c\/li\u003e\n  \u003cli\u003eConfirm stud diameter and use the supplied matching lock nut.\u003c\/li\u003e\n  \u003cli\u003eSpin the pulley by hand to check for smooth rotation before tightening.\u003c\/li\u003e\n  \u003cli\u003eRe-route belt and test deck engagement at low throttle first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The BOSFLAG GY20629 2-pack is aimed at homeowners, landscape pros, and small-engine repair technicians who need an affordable, accurately sized replacement pulley for John Deere and Cub Cadet mower decks. It’s useful for seasonal tune-ups, replacing noisy or worn idlers, and keeping older tractors running reliably without sourcing OEM parts.\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 pulley replace John Deere part GY20629?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The BOSFLAG GY20629 matches OEM dimensions and replaces John Deere GY20629 and listed cross-references.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which lock nut should I use for my tractor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Match the stud: use the 3\/8\"-16 flanged nylon nut for inch studs or the M10 nut for metric studs supplied in the kit.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BOSFLAG","offers":[{"title":"Default Title","offer_id":56833123221844,"sku":"B0948RJDFC","price":64.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/bosflag-gy20629-front-view.jpg?v=1787037835","url":"https:\/\/gardenluxe.co.uk\/products\/bosflag-gy20629-idler-pulley-2-pack-for-john-deere-cub-cadet-decks-5-23-od-includes-3-8-16-m10-lock-nuts","provider":"Gardenluxe Uk","version":"1.0","type":"link"}