{"product_id":"assault-industries-polaris-rzr-rs1-phoenix-axles","title":"Assault Industries Polaris RZR RS1 Phoenix Axles (2018-2021)","description":"\u003cp\u003e\u003cstrong\u003eAssault Industries MAS-223 Phoenix Axles are stock-length front and rear replacement axles for the 2018-2021 Polaris RZR RS1.\u003c\/strong\u003e They pair heat-treated 4340 chromoly shafts, larger than stock, with Assault's proprietary high-temp grease, which showed no breakdown at 586.4°F in lab testing.\u003c\/p\u003e\n\u003cp\u003eChoose Front or Rear. Each axle is sold individually.\u003c\/p\u003e\n\u003cp\u003eThese RZR RS1 axles suit the single-seat machine's hard-charging use. Choose the RS1 front axle or the RZR RS1 rear axle; each RZR RS1 axle is sold on its own. Shoppers comparing Polaris RS1 axles, RS1 axles or Polaris RZR RS1 axles will find these RZR RS1 heavy duty axles are the Phoenix axles Assault builds around its high-temp grease, the Assault Industries Phoenix axle for the RS1.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eProprietary high-temp grease blend, virtually waterproof\u003c\/li\u003e\n\u003cli\u003eGrease resists temperatures above 586.4°F (308°C)\u003c\/li\u003e\n\u003cli\u003eReduced friction prevents heat buildup\u003c\/li\u003e\n\u003cli\u003eHigh pressure tolerance for extreme rides\u003c\/li\u003e\n\u003cli\u003eHeat-treated 4340 chromoly shafts, larger than stock\u003c\/li\u003e\n\u003cli\u003eOperates at high CV angles\u003c\/li\u003e\n\u003cli\u003eField and lab tested; 3-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBuilt To Solve: Overheated CVs on a Polaris RZR RS1\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCV joints failing when stock grease overheats\u003c\/li\u003e\n\u003cli\u003eBoot and CV failures after long, fast pulls\u003c\/li\u003e\n\u003cli\u003eStock shafts bending on rocks and logs\u003c\/li\u003e\n\u003cli\u003eReplacing a broken axle with another stock part\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBest For: 2018-2021 Polaris RZR RS1 Owners\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2018-2021 RZR RS1 owners\u003c\/li\u003e\n\u003cli\u003eSingle-seat dune and trail riders\u003c\/li\u003e\n\u003cli\u003eRiders who run at speed and full articulation\u003c\/li\u003e\n\u003cli\u003eOwners replacing a front or rear axle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Assault Industries\u003c\/li\u003e\n\u003cli\u003eProduct line: MAS-223 Phoenix Axle\u003c\/li\u003e\n\u003cli\u003eShaft: heat-treated 4340 chromoly steel, larger than stock\u003c\/li\u003e\n\u003cli\u003eGrease: proprietary high-temp blend, tested to 586.4°F (308°C)\u003c\/li\u003e\n\u003cli\u003eWarranty: 3 years\u003c\/li\u003e\n\u003cli\u003eLength: stock\u003c\/li\u003e\n\u003cli\u003ePositions: front, rear\u003c\/li\u003e\n\u003cli\u003eSold: individually\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number (front): AXRS01-005F0#AB\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number (rear): AXRS01-002R0#AC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePolaris RZR RS1: 2018-2021\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplaces OEM front 1333434, 1334492 and rear 1333124, 1333439, 1333718, 1333944, 1334307, 1334490. Fitment is not guaranteed on applications not listed above; confirm your year, model and cab before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eAre front and rear the same part?\u003c\/h3\u003e\n\u003cp\u003eNo. The front (AXRS01-005F0#AB) and rear (AXRS01-002R0#AC) are different axles, sold individually.\u003c\/p\u003e\n\u003ch3\u003eWhich years do they fit?\u003c\/h3\u003e\n\u003cp\u003eSuperATV lists the 2018-2021 Polaris RZR RS1.\u003c\/p\u003e\n\u003ch3\u003eWhich OEM part numbers do they replace?\u003c\/h3\u003e\n\u003cp\u003eSuperATV lists front 1333434, 1334492 and rear 1333124, 1333439, 1333718, 1333944, 1334307, 1334490.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the Phoenix grease different?\u003c\/h3\u003e\n\u003cp\u003eAssault Industries uses a proprietary high-temp grease blend that is virtually waterproof. In lab testing it showed no breakdown at 586.4°F (308°C), the limit of the test equipment, while OEM grease broke down at 365°F.\u003c\/p\u003e\n\u003ch3\u003eHow do they compare to SuperATV Rhino 2.0 axles?\u003c\/h3\u003e\n\u003cp\u003eBoth use heat-treated 4340 chromoly. The Phoenix Axle adds Assault's high-temp grease and a 3-year warranty, versus 18 months on Rhino 2.0; Rhino 2.0 costs less. See our Rhino 2.0 listing for the RZR RS1.\u003c\/p\u003e\n\u003ch3\u003eWhat warranty do they carry?\u003c\/h3\u003e\n\u003cp\u003eAssault Industries backs MAS-223 Phoenix Axles with a 3-year warranty.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Assault Industries\u003c\/h2\u003e\n\u003cp\u003eAssault Industries built the MAS-223 Phoenix Axle around its own high-temperature grease. In Assault's viscosity lab testing the grease showed no breakdown at 586.4°F, where the test equipment maxed out; OEM grease broke down at 365°F. Every MAS-223 Phoenix Axle is backed by a 3-year warranty.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eComplete Your RZR RS1 Driveline\u003c\/h2\u003e\n\u003cp\u003eWhen one RS1 axle fails, the others have usually seen the same heat and abuse, so decide which positions you need. Confirm your model, year and option against the fitment list.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are front and rear the same part?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. The front (AXRS01-005F0#AB) and rear (AXRS01-002R0#AC) are different axles, sold individually.\"}}, {\"@type\": \"Question\", \"name\": \"Which years do they fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"SuperATV lists the 2018-2021 Polaris RZR RS1.\"}}, {\"@type\": \"Question\", \"name\": \"Which OEM part numbers do they replace?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"SuperATV lists front 1333434, 1334492 and rear 1333124, 1333439, 1333718, 1333944, 1334307, 1334490.\"}}, {\"@type\": \"Question\", \"name\": \"What makes the Phoenix grease different?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Assault Industries uses a proprietary high-temp grease blend that is virtually waterproof. 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