{"product_id":"polaris-rzr-hd-reverse-load-upper-ball-joint","title":"Polaris RZR HD Reverse Load Upper Ball Joint | ZBroz Racing","description":"\u003ch1\u003ePolaris RZR HD Reverse Load Upper Ball Joint by ZBroz Racing\u003c\/h1\u003e\n\u003cp\u003eEliminate the most common Polaris RZR upper ball joint failure with the ZBroz HD Reverse Load Upper Ball Joint. The factory upper ball joint is loaded the wrong way for hard off-road use — under aggressive driving and at full droop, the housing wants to pull the ball stud out the bottom of the joint. The ZBroz reverse-load design flips that geometry so the load pushes against the strongest point of the assembly.\u003c\/p\u003e\n\u003cp\u003eWhether you're racing, hammering whoops, or just running an aggressive trail bike harder than Polaris designed for, this is the upgrade that ends the failure mode that takes out factory upper ball joints. Direct OEM replacement — no fabrication, no modifications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Load Design\u003c\/strong\u003e — corrects the factory load direction that causes most failures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardened HD Construction\u003c\/strong\u003e — built for aggressive off-road use, not just OEM replacement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Fit\u003c\/strong\u003e — drops into factory A-arms with no machining or fab\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEliminates Common Pull-Out Failure\u003c\/strong\u003e at full droop and big-hit loading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-Life Sealing\u003c\/strong\u003e — keeps grit out, grease in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngineered and Manufactured in the USA\u003c\/strong\u003e by ZBroz Racing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-duty reverse-load upper ball joint (single unit — order quantity per A-arm needed)\u003c\/li\u003e\n  \u003cli\u003eHardened steel construction\u003c\/li\u003e\n  \u003cli\u003eDirect OEM replacement — no modifications required\u003c\/li\u003e\n  \u003cli\u003eSealed greaseable design\u003c\/li\u003e\n  \u003cli\u003eEngineered for Polaris RZR HD applications\u003c\/li\u003e\n  \u003cli\u003eDesigned and manufactured by ZBroz Racing in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePolaris RZR XP 1000, XP 4 1000, XP Turbo, XP 4 Turbo\u003c\/li\u003e\n  \u003cli\u003ePolaris RZR RS1\u003c\/li\u003e\n  \u003cli\u003ePolaris RZR Pro XP, Pro XP 4\u003c\/li\u003e\n  \u003cli\u003ePolaris General 1000, General 4 1000\u003c\/li\u003e\n  \u003cli\u003eDirect fit on factory A-arms\u003c\/li\u003e\n  \u003cli\u003eNot compatible with Pro R, Turbo R, or Pro S (those use different ball joint specs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does \"reverse load\" actually mean?\u003c\/h3\u003e\n\u003cp\u003eFactory upper ball joints are loaded so that the ball stud is pulled out the bottom of the housing under suspension load — the weakest direction. Reverse-load design flips that geometry so the load pushes against the strongest part of the assembly, dramatically extending service life.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my Pro R or Turbo R?\u003c\/h3\u003e\n\u003cp\u003eNo. The Pro R, Turbo R, and Pro S use a different ball joint design. ZBroz makes a dedicated 300M HD lower ball joint for those models — contact Dunes 2 Dezert SXS for the correct part.\u003c\/p\u003e\n\u003ch3\u003eIs this a single ball joint or a set?\u003c\/h3\u003e\n\u003cp\u003eEach unit is a single ball joint. Most RZR applications need two upper ball joints (one per A-arm side) — verify your needs and order accordingly.\u003c\/p\u003e\n\u003ch3\u003eWill it work with aftermarket A-arms?\u003c\/h3\u003e\n\u003cp\u003eYes for most aftermarket A-arms that retain the factory ball joint pocket dimensions. Verify with your A-arm manufacturer if uncertain.\u003c\/p\u003e\n\u003ch3\u003eIs installation DIY-friendly?\u003c\/h3\u003e\n\u003cp\u003eYes — plan 1-2 hours per side with a ball joint press or a quality ball joint service tool. Detailed instructions are included.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy ZBroz\u003c\/h2\u003e\n\u003cp\u003eZBroz's racing program identified the factory upper ball joint failure mode in actual desert competition, then engineered the reverse-load fix. Same heat-treated construction used on their race trucks, available as a direct OEM replacement for your trail or sport build.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCTA\u003c\/h2\u003e\n\u003cp\u003eStop replacing the same upper ball joint every season. Upgrade to the ZBroz HD Reverse Load design and eliminate the failure mode for good. Order from Dunes 2 Dezert SXS.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What does reverse load actually mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Factory upper ball joints are loaded so that the ball stud is pulled out the bottom of the housing under suspension load — the weakest direction. Reverse-load design flips that geometry so the load pushes against the strongest part of the assembly, dramatically extending service life.\"}},{\"@type\":\"Question\",\"name\":\"Will this fit my Pro R or Turbo R?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The Pro R, Turbo R, and Pro S use a different ball joint design. 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Detailed instructions are included.\"}}]}\n\u003c\/script\u003e","brand":"ZBroz Racing","offers":[{"title":"Default Title","offer_id":43031611965476,"sku":"K37-4875-0","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/6488\/3236\/files\/k37-4875-0-upper-ball-joint-single_grande_f255742a-6628-4ddd-99b6-77e228bf3ac7.jpg?v=1765307850","url":"https:\/\/dunes2dezertsxs.com\/products\/polaris-rzr-hd-reverse-load-upper-ball-joint","provider":"Dunes 2 Dezert SXS","version":"1.0","type":"link"}