Strengthen Your XP Pro Rear End — Before the OEM Knuckles Wallow Out and Leave You Stranded

Stop running OEM rear knuckles that are known to wallow out and crack under hard use. The Black Ops Machine Polaris RZR XP Pro Rear Knuckles are machined from 6061 billet aluminum with a sealed bearing carrier for easy serviceability and maximum contamination protection. Hard anodized, direct bolt-in, and sold as a set of 2 spindles — race ready out of the box.

Why XP Pro Riders Choose the Black Ops Machine Rear Knuckles

• 6061 Billet Aluminum – Machined from solid billet — not cast — for superior strength and resistance to the wallowing and cracking that plagues OEM knuckles under hard use.
• Sealed Bearing Carrier – Keeps mud, water, and dirt out of your wheel bearings, extending bearing life and making service significantly easier when the time comes.
• Hard Anodized Black Finish – Corrosion-resistant and aggressive-looking on any XP Pro build.
• Direct Bolt-In – No modifications required — direct replacement for OEM rear knuckles on the Polaris RZR XP Pro.
• Race Ready – Built to the reliability standard that race applications demand — strengthened mounting points and billet construction for maximum confidence at speed.
• Sold in Pairs – Set of 2 spindles per order — always replace both sides at the same time.

Perfect For

🏜️ Desert racing • 🪨 Rock crawling • 🏖️ Dune riding • 🌲 Trail riding • 🏁 Race builds • 💥 Any XP Pro owner tired of OEM rear end failures

Complete Kit Includes

• ✓ Two (2) 6061 billet aluminum rear knuckles / spindles (pair)
• ✓ Sealed bearing carrier
• ✓ Hard anodized black finish
• ✓ All required hardware

Technical Specifications

Vehicle Fitment

• Polaris RZR XP Pro (all years) — rear knuckle / spindle position
• Polaris RZR XP Pro 4 (all years) — rear knuckle / spindle position

Why Billet Beats OEM XP Pro Rear Knuckles

OEM Polaris RZR XP Pro rear knuckles are cast aluminum — adequate for stock use but not for the forces generated by aggressive off-road riding, especially at the rear where lateral loads from hard cornering and jumps are highest. Cast aluminum has inherent porosity and inconsistency that makes it susceptible to cracking and wallowing at the mounting points over time. Billet aluminum is machined from solid stock, eliminating those inconsistencies and delivering a significantly stronger, more consistent part. The sealed bearing carrier addresses the other primary failure mode: contamination. OEM knuckles allow mud and water to reach the wheel bearing, accelerating wear. The sealed design keeps that contamination out and makes bearing service straightforward when the time comes. Direct bolt-in fitment means no modifications — pull the OEM knuckles, install these, torque to spec, and ride.

Real Riders, Real Results

"Wallowed out an OEM rear knuckle after a hard landing in the desert. Put these billet units on and the rear end feels completely transformed — tight and confidence-inspiring. Direct bolt-in made the install straightforward."

"The sealed bearing carrier is the feature that sold me. My OEM bearings were constantly contaminated from mud riding. Two seasons on these knuckles and the bearings are still clean and tight."

100% Risk-Free With R1 Protect

✓ 30-Day Returns - Don't love it? Return it hassle-free
✓ Fast Shipping - Quick dispatch on in-stock orders
✓ Expert Support - 801-899-2520 | Real UTV techs

Stop waiting for OEM knuckles to fail at the worst moment. Upgrade to billet and ride with confidence.