Polaris RZR 900 Ball Joints

Your ball joints take a beating on the trail — rocks, ruts, hard landings, and constant steering abuse all wear them down. A worn-out ball joint can get loose, affect your handling, or fail completely, leaving you stranded. The good news is you've got three solid options here, depending on how hard you ride.

Super Duty 300M — Maximum Strength

Want the toughest option available? This one's built from 300M steel — the hardest stuff we could source — hardened, then black oxide coated to resist corrosion. The stud itself is thicker and doesn't taper down as much as the stock design, which means it can handle way more abuse. Testing shows this ball joint sits at 2.25x stronger than what Polaris bolted on from the factory. Pick this if you're running hard terrain regularly and want zero doubt about durability.

Heavy-Duty 4340 — Solid Middle Ground

Not everyone needs the absolute top tier. This version uses hardened 4340 steel with black oxide coating and a wider base for extra support where it counts. It'll run nearly 2x stronger than your original equipment and stands up to serious abuse without breaking the bank. A solid pick for weekend trail riders who want real improvement without going all-in.

OE Replacement — Stock Strength

Just need to swap out a worn joint and keep things simple? This matches factory specs and works fine for lighter, casual riding.

What You Get

Every ball joint includes a grease zerk fitting so you can actually lubricate it and keep it running smooth. The design lets you adjust the fit on steel-to-steel contact, which means you stay in control of how tight or loose it sits as miles add up.

Fitment

• Polaris RZR 900 : 2015-2020
• Polaris RZR S 900 : 2015-2020
• Polaris RZR 4 900 : 2015-2018
• Polaris RZR S4 900 : 2018
• Polaris RZR XC 900 : 2015-2017

Fits both upper and lower A-arms on the models listed above.