{"product_id":"royal-enfield-spacer-sprocket-side-rear-wheel-594051-b","title":"Spacer – Sprocket Side (Rear Wheel) for Bullet 500 Euro 4 \/ Classic 500 Euro 4 – 594051\/B (Replaces 594051\/A)","description":"\u003ch2\u003eProduct Description \u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eRoyal Enfield 594051\/B\u003c\/strong\u003e is the \u003cstrong\u003erear wheel spacer – sprocket side\u003c\/strong\u003e (chain side). This small but critical OEM spacer sits on the sprocket\/chain side of the rear axle assembly and maintains correct wheel alignment, sprocket carrier spacing, and bearing load positioning. If the wrong spacer is fitted (or the original is worn, missing, or damaged after bearing work), you can get chain line offset, abnormal bearing wear, uneven wheel alignment, and repeat failures soon after service.\u003c\/p\u003e\n\u003cp\u003eThis part is also searched as \u003cem\u003erear wheel spacer, sprocket-side spacer, chain side wheel spacer, rear axle spacer, wheel distance piece\u003c\/em\u003e. OEM fit matters here because the thickness\/shoulder is what sets the axle stack-up—mixing spacers from other platforms can create side-load on bearings and misalign the wheel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBefore you buy:\u003c\/strong\u003e confirm your bike’s exact variant\/market (Euro 4\/BS4 UCE 500 family) via VIN or rear wheel assembly diagram, or share photos of your existing spacer + rear axle stack before dispatch.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Royal Enfield OEM spacer – correct thickness \u0026amp; shoulder for factory axle stack-up\u003c\/li\u003e\n\u003cli\u003ePosition: rear wheel, sprocket\/chain side (not disc side)\u003c\/li\u003e\n\u003cli\u003eHelps maintain correct chain line and rear wheel alignment\u003c\/li\u003e\n\u003cli\u003ePrevents bearing side-loading caused by incorrect spacing\u003c\/li\u003e\n\u003cli\u003eUsed during rear wheel bearing, sprocket carrier, or cush rubber service\u003c\/li\u003e\n\u003cli\u003eSupersession: \u003cstrong\u003e594051\/B replaces 594051\/A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmall part, big impact on reliability and return prevention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility Table \u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003ePlatform\/Engine\u003c\/th\u003e\n\u003cth\u003eBS\/Emission\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eStatus (✅\/❓)\u003c\/th\u003e\n\u003cth\u003eNotes\/Constraints\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBullet 500 (EFI)\u003c\/td\u003e\n\u003ctd\u003eUCE 500\u003c\/td\u003e\n\u003ctd\u003eEuro 4 \/ BS4\u003c\/td\u003e\n\u003ctd\u003eApprox. 2017–2021*\u003c\/td\u003e\n\u003ctd\u003e✅\u003c\/td\u003e\n\u003ctd\u003eShown in Bullet 500 Euro IV rear wheel parts catalogue; confirm by VIN\/diagram for market\/year.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClassic 500 (EFI \/ C5)\u003c\/td\u003e\n\u003ctd\u003eUCE 500\u003c\/td\u003e\n\u003ctd\u003eEuro 4 \/ BS4\u003c\/td\u003e\n\u003ctd\u003eApprox. 2017–2021*\u003c\/td\u003e\n\u003ctd\u003e✅\u003c\/td\u003e\n\u003ctd\u003eShown in Classic 500 Euro IV parts catalogue; 594051\/A is superseded by 594051\/B for Euro4 rear wheel stack.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClassic 500 variants (Pegasus \/ Redditch \/ Gunmetal Grey)\u003c\/td\u003e\n\u003ctd\u003eUCE 500\u003c\/td\u003e\n\u003ctd\u003eEuro 4 \/ BS4\u003c\/td\u003e\n\u003ctd\u003eVaries*\u003c\/td\u003e\n\u003ctd\u003e❓\u003c\/td\u003e\n\u003ctd\u003eListed under 594051\/A fitment with supersession to 594051\/B; verify by VIN + rear wheel assembly diagram.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBullet Trials 500\u003c\/td\u003e\n\u003ctd\u003eUCE 500\u003c\/td\u003e\n\u003ctd\u003eEuro 4 \/ BS4\u003c\/td\u003e\n\u003ctd\u003eVaries*\u003c\/td\u003e\n\u003ctd\u003e❓\u003c\/td\u003e\n\u003ctd\u003eAppears in dealer part-number fitment search for 594051\/B; request photo\/VIN confirmation before dispatch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNot compatible (common confusion)\u003c\/td\u003e\n\u003ctd\u003e650 Twins \/ J-Series 350\u003c\/td\u003e\n\u003ctd\u003eBS6+\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e❓\u003c\/td\u003e\n\u003ctd\u003eDo not assume: spacers differ by platform. Order only if your EPC\/diagram matches 594051\/B.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e*Years are indicative because Royal Enfield variants overlap by market. Always confirm by VIN \/ rear wheel assembly diagram.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eVariants\u003c\/h2\u003e\n\u003cp\u003eNo variants.\u003c\/p\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1 (Fitment): How do I confirm 594051\/B is the correct spacer for my bike?\u003c\/strong\u003e\u003cbr\u003eConfirm (1) your model\/platform is within the Euro 4\/BS4 UCE 500 family, (2) your rear wheel assembly diagram\/VIN search shows \u003cstrong\u003e594051\/B\u003c\/strong\u003e, and (3) your removed spacer matches the same position (sprocket\/chain side) and dimensions. If unsure, share a photo of the rear axle stack\/spacer next to a scale before dispatch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2 (Fitment): Will this fit BS3 UCE 500 or older AVL\/Carb models?\u003c\/strong\u003e\u003cbr\u003eDo not assume. Royal Enfield used different axle\/spacer stacks across years and markets. If your catalogue shows \u003cstrong\u003e594051\/A\u003c\/strong\u003e, this is typically superseded to \u003cstrong\u003e594051\/B\u003c\/strong\u003e—but confirm via VIN\/diagram before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3 (Comparison): 594051\/A vs 594051\/B—what changed?\u003c\/strong\u003e\u003cbr\u003e594051\/B is the \u003cstrong\u003ecurrent replacement\/supersession\u003c\/strong\u003e for 594051\/A in Royal Enfield’s parts systems. When your model lists 594051\/A, ordering 594051\/B is usually correct as the updated supply reference—verify with your VIN if you want zero-risk.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4 (Installation): Any precautions while installing this spacer?\u003c\/strong\u003e\u003cbr\u003eClean the axle and spacer seats, lightly grease the axle, ensure the spacer sits flush (no burrs), and tighten axle torque as per service manual. After installation, check wheel free rotation, chain alignment, and rear brake function.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5 (Symptoms): What problems does a wrong\/missing sprocket-side spacer cause?\u003c\/strong\u003e\u003cbr\u003eRear wheel misalignment, chain running off-line, abnormal sprocket\/cush wear, premature bearing failure, wheel side-play, and uneven rear tyre wear—especially soon after a bearing\/sprocket job.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ6 (Returns-prevention): What should I send you to confirm before shipping?\u003c\/strong\u003e\u003cbr\u003eSend (1) your VIN (last 6 digits okay), (2) a clear photo of your rear wheel\/axle area during removal (showing spacer position), and (3) your bike’s exact model + year\/market. This prevents wrong-platform spacer orders.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Royal Enfield","offers":[{"title":"Default Title","offer_id":51047488651559,"sku":"594051\/B","price":86.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/Royal_Enfield_594051_B_spacer_sprocket_side_rear_wheel_for_Bullet_500_and_Classic_500_Euro_4.png?v=1771576995","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-spacer-sprocket-side-rear-wheel-594051-b","provider":"UNDER THE HOOD","version":"1.0","type":"link"}