Get Your RS1 Race-Ready
You want to tear up the sand with the big boysbut those OEM axles just aren't going to cut it. You need the best of the best if you want to turn your Polaris RZR RS1 into a real racing machine. That's where Assault Industries' MAS-223 Phoenix Axles come in. They're designed for the most intense riders and the most extreme conditions. Thanks to Assault's proprietary high-temp grease blend and race-ready axle construction, Phoenix Axles dominate the competition.

• Proprietary high-temp grease blend for unmatched performance
• Incredibly high CV angles
• 4340 chromoly steel construction
• Increased shaft size

Built to Withstand Face-Melting Heat!
Here's a simple factheat kills axles. And it doesn't matter if it's the constant heat of the desert or the heat generated by pushing your axles to their limits. As temperatures rise, the axle grease breaks down. Without grease, you get friction. That friction ruins your boots and CV joints, and can even cause catastrophic axle failure. Assault invented a premium axle grease blend that won't break down even in the most extreme conditions. That's rightyou can push your RS1 to its absolute limits without breaking down thanks to Assault's revolutionary Phoenix Axles.

Tested up to 586.4°F
Phoenix Axles really walk the walk. They were tested up to 586.4°Fas hot as the testing can getwithout failure. That's 61% hotter than the OEM grease, which failed at 365°F. That means it could literally be hot enough to fry an egg outside and these axles won't even flinch. No standard axles can compete with that kind of premium performance. If you're looking to race with the professionals (or maybe you ARE a professional), you won't find better performance axles for your RS1.

The Most Reliable CV Joints
Assault knows that it takes more than industry-leading high-temp grease to make the world's best racing axles. They upped the game when it comes to the CV joints too. These CV joints are built for those complex, tricky rides that require high articulation angles. Phoenix Axles deliver 100% power no matter how weird and wild the ride getsand they won't overheat under stress. Whether you're tearing up the trail, racing on sand, or clambering on the rocks, these CV joints can handle it.

Beefy Chromoly Axle Shaft
Of course Assault didn't skimp on the axle shafts either. Phoenix Axles have larger shafts than OEM. Plus they're made with heat-treated chromoly steel. Combined, that makes them nearly unbreakable. No boulder or log is going to take these axles out! Beefy axle shafts, muscular CV joints, and unstoppable grease make Phoenix Axles the world's leading performance axle. Would you expect any less from Assault Industries?

• Polaris RZR RS1 : 2018-2021

Replaces OEM Part #:
Front : 1333434, 1334492
Rear : 1333124, 1333439, 1333718, 1333944, 1334307, 1334490