Polaris RZR HD Reverse Load Upper Ball Joint | ZBroz Racing

Polaris RZR HD Reverse Load Upper Ball Joint by ZBroz Racing Eliminate 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. Whether 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. Key Features Reverse Load Design — corrects the factory load direction that causes most failures Hardened HD Construction — built for aggressive off-road use, not just OEM replacement Direct OEM Fit — drops into factory A-arms with no machining or fab Eliminates Common Pull-Out Failure at full droop and big-hit loading Long-Life Sealing — keeps grit out, grease in Engineered and Manufactured in the USA by ZBroz Racing Built To Solve OEM upper ball joint pull-out under hard hits, high steering load, or aggressive suspension cycling. Loose front-end feel caused by worn ball joints and excessive steering knuckle play. Premature wear from big tires, hardpack chop, dunes, rocks, and long ride days. Front suspension noise, clunking, or wandering caused by a tired factory joint. Weak OEM hardware that can become a failure point on built Polaris RZR platforms. Best For Polaris RZR XP 1000, XP Turbo, Turbo S, RS1, Pro R, and Turbo R owners upgrading weak front-end hardware. Riders running larger tires, heavier wheels, or more aggressive terrain than stock parts were built around. Dune, desert, trail, and rock riders who want stronger steering and suspension confidence. Machines with visible ball joint play, clunking, or worn factory front-end components. Preventive maintenance during control arm, knuckle, wheel bearing, or suspension service. Specifications Heavy-duty reverse-load upper ball joint (single unit — order quantity per A-arm needed) Hardened steel construction Direct OEM replacement — no modifications required Sealed greaseable design Engineered for Polaris RZR HD applications Designed and manufactured by ZBroz Racing in the USA Fitment Polaris RZR XP 1000, XP 4 1000, XP Turbo, XP 4 Turbo Polaris RZR RS1 Polaris RZR Pro XP, Pro XP 4 Polaris General 1000, General 4 1000 Direct fit on factory A-arms Not compatible with Pro R, Turbo R, or Pro S (those use different ball joint specs) Frequently Asked Questions What does "reverse load" actually mean? 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. Will this fit my Pro R or Turbo R? No. 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. Is this a single ball joint or a set? Each 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. Will it work with aftermarket A-arms? Yes for most aftermarket A-arms that retain the factory ball joint pocket dimensions. Verify with your A-arm manufacturer if uncertain. Is installation DIY-friendly? Yes — plan 1-2 hours per side with a ball joint press or a quality ball joint service tool. Detailed instructions are included. Why ZBroz Racing ZBroz'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. Order Yours Stop 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. Install Video General reference: watch the ZBroz tech walkthrough on how to press a ball joint in and out of an A-arm on a side-by-side. The same press-and-install procedure applies to this ball joint.