SPECIFICATIONS

Brand Name: M MATI

Origin: Mainland China

For ATV Brand/Model: Polaris

Special Features: Rear Wheel

MPN： 5135563  3515087  7710440

Package：

Rear Wheel Bearing Carrier x 2
Rear Wheel Bearing Carrier Bearing x 2
Rear Wheel Bearing Carrier Retaining Clip x 2

Placement on Vehicle:  Rear Wheel

Warranty：1 Year

Fit for Polaris ATV as Following

Sportsman 400 HO 2011-2014
Sportsman 450 2007
Sportsman 450 HO 2016-2025
Sportsman 500 HO 2008-2013
Sportsman 500 EFI 2007-2011(Exclude X2 & Touring Edition)
Sportsman 500 Forest 2011-2012
Sportsman 570 2014-2017(Exclude X2 & ACE & 6X6 Edition)
Sportsman 570 2018-2024(Exclude X2 & 6X6 Edition & Sportsman 570 Utility 2018)
Sportsman 570 2025(Exclude X2 & 6X6 Edition & Sportsman 570 EPS Prem)
Sportsman 700 EFI 2007
Sportsman 800 EFI 2007(Only for A07MH76AQ/AX/AY/AZ/MN76AT Edition)
Sportsman 800 EFI 2008-2014(Exclude X2 & Touring Edition)
Sportsman 800 6x6 Big Boss 2009-2014
Sportsman 800 Forest 2012
Sportsman ETX 2015
Hawkeye 325 2x4 2015
Hawkeye 400 2x4 2011-2013

 

🛠️ Installation Tips

• The "Press" Factor: These bearings come pre-installed in the carriers. However, if you ever need to replace the bearings again, always press on the outer race of the bearing. Pressing on the inner race will dimple the ball bearings and cause premature failure.

• Axle Nut Torque: This is critical. For most Sportsman models, the rear axle nut should be torqued to $80\text{ lb-ft}$. An under-tightened nut allows the hub to "chatter" on the axle splines, which will quickly destroy both the new hub and your expensive CV axle.

• Anti-Seize on Splines: Apply a thin layer of anti-seize lubricant to the CV axle splines before sliding the new carrier on. This prevents the aluminum hub from "welding" itself to the steel axle over time, making future repairs much easier.

• Inspect the Bushings: While the carrier is removed, check the condition of your A-arm bushings. If the carrier is new but the bushings are worn, the rear end will still feel loose.

• Cotter Pin Safety: Never reuse an old cotter pin on the axle nut. This kit uses high-torque components; a fresh cotter pin is your only insurance against the axle nut backing off during a ride.

🔍 Troubleshooting Guide

Issue	Possible Cause	Solution
Rear Wheel "Wobble"	Worn bearing or loose axle nut.	Jack up the ATV and shake the tire. If it moves but the A-arms don't, the bearing inside the carrier is shot.
Grinding/Chirping Noise	Dry bearings or sand ingress.	High-pressure washing often pushes water past the seals. If the noise changes with speed, the bearing races are pitted and need replacement.
Brake Rotor Rubbing	Bearing failure causing "tilt."	If the rear brake rotor is hitting the caliper bracket, the carrier bearing has likely collapsed, allowing the entire hub to sit at an angle.
Clicking During Turns	Damaged carrier splines.	If the hub is loose on the axle, it will "click" as the splines jump. Check the internal splines of the carrier for rounded edges.
Overheating Hub	Over-torqued nut or lack of lube.	If the hub is too hot to touch after a short ride, the bearing preload may be incorrect or the internal spacer is missing.