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Boss Bearing 50-1207B Rear IRS Knuckle Kit Polaris Sportsman Scrambler 550 850 1000 XP

Independent Suspension Bushing Kit

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50-1207B

The Boss Bearing 50-1207B Rear Independent Suspension Knuckle Kit delivers one of the broadest fitments available for Polaris ATV rear suspension repair, covering the Sportsman 550, 850, and 1000 XP, Scrambler 850 and 1000 XP, Sportsman Forest, and Sportsman Touring across model years 2009 through 2025.

The rear knuckle is a critical structural component of the independent rear suspension system — it connects the wheel hub to the suspension arms and controls the geometry that determines how your machine tracks, corners, and absorbs terrain. A bent, cracked, or worn knuckle throws off wheel alignment, causes uneven tire wear, and can make the machine feel unstable or pull to one side under load. This kit supplies the knuckle component only, making it the right choice when the bearings and hub are still in good shape but the knuckle itself has taken damage — common after impacts with rocks, stumps, or hard landings. Replacing just the knuckle restores correct suspension geometry and gets your machine back to riding the way it should, at a fraction of the cost of replacing the entire hub assembly.

Limited Supply: only 4 remaining
Pricing: $39.69
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Application Detail

YearMakeModelSubmodelNotes
2022PolarisScrambler 850--Two kits required per vehicle
2021PolarisScrambler 850--Two kits required per vehicle
2020PolarisScrambler 850--Two kits required per vehicle
2019PolarisScrambler 850--Two kits required per vehicle
2018PolarisScrambler 850--Two kits required per vehicle
2017PolarisScrambler 850--Two kits required per vehicle
2016PolarisScrambler 850--Two kits required per vehicle
2015PolarisScrambler 850--Two kits required per vehicle
2018PolarisScrambler XP 1000EPSTwo kits required per vehicle
2017PolarisScrambler XP 1000EPSTwo kits required per vehicle
2016PolarisScrambler XP 1000EPSTwo kits required per vehicle
2015PolarisScrambler XP 1000EPSTwo kits required per vehicle
2014PolarisScrambler XP 1000EPSTwo kits required per vehicle
2020PolarisScrambler XP 1000STwo kits required per vehicle
2014PolarisScrambler XP 850--Two kits required per vehicle
2014PolarisScrambler XP 850HOTwo kits required per vehicle
2013PolarisScrambler XP 850HOTwo kits required per vehicle
2014PolarisScrambler XP 850LE HO EPSTwo kits required per vehicle
2013PolarisScrambler XP 850LE HO EPSTwo kits required per vehicle
2013PolarisSportsman 550--Two kits required per vehicle
2012PolarisSportsman 550--Two kits required per vehicle
2011PolarisSportsman 550BrowningTwo kits required per vehicle
2011PolarisSportsman 550Browning EPSTwo kits required per vehicle
2014PolarisSportsman 550EFITwo kits required per vehicle
2011PolarisSportsman 550EFITwo kits required per vehicle
2010PolarisSportsman 550EFITwo kits required per vehicle
2011PolarisSportsman 550EFI EPSTwo kits required per vehicle
2010PolarisSportsman 550EFI EPSTwo kits required per vehicle
2014PolarisSportsman 550EPSTwo kits required per vehicle
2013PolarisSportsman 550EPSTwo kits required per vehicle
2012PolarisSportsman 550EPSTwo kits required per vehicle
2014PolarisSportsman 550ForestTwo kits required per vehicle
2013PolarisSportsman 550ForestTwo kits required per vehicle
2012PolarisSportsman 550ForestTwo kits required per vehicle
2011PolarisSportsman 550ForestTwo kits required per vehicle
2013PolarisSportsman 550LETwo kits required per vehicle
2012PolarisSportsman 550LETwo kits required per vehicle
2014PolarisSportsman 550LE Browning EPSTwo kits required per vehicle
2013PolarisSportsman 550LE Browning EPSTwo kits required per vehicle
2012PolarisSportsman 550LE Browning EPSTwo kits required per vehicle
2014PolarisSportsman 550Pursuit EPSTwo kits required per vehicle
2011PolarisSportsman 550Pursuit EPSTwo kits required per vehicle
2011PolarisSportsman 550Touring EFI EPSTwo kits required per vehicle
2010PolarisSportsman 550Touring EFI EPSTwo kits required per vehicle
2014PolarisSportsman 550Touring EPSTwo kits required per vehicle
2013PolarisSportsman 550Touring EPSTwo kits required per vehicle
2012PolarisSportsman 550Touring EPSTwo kits required per vehicle
2022PolarisSportsman 850--Two kits required per vehicle
2021PolarisSportsman 850--Two kits required per vehicle
2014PolarisSportsman 850ForestTwo kits required per vehicle
2013PolarisSportsman 850ForestTwo kits required per vehicle
2012PolarisSportsman 850ForestTwo kits required per vehicle
2011PolarisSportsman 850ForestTwo kits required per vehicle
2022PolarisSportsman 850High Lifter EditionTwo kits required per vehicle
2021PolarisSportsman 850High Lifter EditionTwo kits required per vehicle
2022PolarisSportsman 850PremiumTwo kits required per vehicle
2021PolarisSportsman 850PremiumTwo kits required per vehicle
2016PolarisSportsman 850SPTwo kits required per vehicle
2022PolarisSportsman 850TouringTwo kits required per vehicle
2022PolarisSportsman 850TouringTwo kits required per vehicle
2021PolarisSportsman 850TouringTwo kits required per vehicle
2021PolarisSportsman 850TouringTwo kits required per vehicle
2020PolarisSportsman 850TouringTwo kits required per vehicle
2011PolarisSportsman 850Touring EFI EPSTwo kits required per vehicle
2010PolarisSportsman 850Touring EFI EPSTwo kits required per vehicle
2014PolarisSportsman 850Touring EPSTwo kits required per vehicle
2013PolarisSportsman 850Touring EPSTwo kits required per vehicle
2012PolarisSportsman 850Touring EPSTwo kits required per vehicle
2013PolarisSportsman 850Touring HO EPSTwo kits required per vehicle
2012PolarisSportsman 850Touring HO EPSTwo kits required per vehicle
2021PolarisSportsman 850TrailTwo kits required per vehicle
2022PolarisSportsman 850Ultimate Trail EditionTwo kits required per vehicle
2021PolarisSportsman 850Ultimate Trail EditionTwo kits required per vehicle
2018PolarisSportsman SP 850--Two kits required per vehicle
2017PolarisSportsman SP 850--Two kits required per vehicle
2016PolarisSportsman SP 850--Two kits required per vehicle
2015PolarisSportsman SP 850--Two kits required per vehicle
2017PolarisSportsman SP 850Pursuit CamoTwo kits required per vehicle
2019PolarisSportsman SP 850TouringTwo kits required per vehicle
2018PolarisSportsman SP 850TouringTwo kits required per vehicle
2017PolarisSportsman SP 850TouringTwo kits required per vehicle
2016PolarisSportsman SP 850TouringTwo kits required per vehicle
2015PolarisSportsman SP 850TouringTwo kits required per vehicle
2022PolarisSportsman Touring 850--Two kits required per vehicle
2021PolarisSportsman Touring 850--Two kits required per vehicle
2020PolarisSportsman Touring 850--Two kits required per vehicle
2022PolarisSportsman Touring 850PremiumTwo kits required per vehicle
2014PolarisSportsman WV850HOTwo kits required per vehicle
2013PolarisSportsman X2 550--Two kits required per vehicle
2012PolarisSportsman X2 550--Two kits required per vehicle
2011PolarisSportsman X2 550--Two kits required per vehicle
2010PolarisSportsman X2 550--Two kits required per vehicle
2014PolarisSportsman X2 550EPSTwo kits required per vehicle
2011PolarisSportsman X2 850EFITwo kits required per vehicle
2021PolarisSportsman XP 1000--Two kits required per vehicle
2020PolarisSportsman XP 1000--Two kits required per vehicle
2019PolarisSportsman XP 1000--Two kits required per vehicle
2018PolarisSportsman XP 1000--Two kits required per vehicle
2017PolarisSportsman XP 1000--Two kits required per vehicle
2016PolarisSportsman XP 1000--Two kits required per vehicle
2015PolarisSportsman XP 1000--Two kits required per vehicle
2021PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2020PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2019PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2018PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2017PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2016PolarisSportsman XP 1000High Lifter EditionTwo kits required per vehicle
2021PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2020PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2019PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2018PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2017PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2016PolarisSportsman XP 1000Hunter EditionTwo kits required per vehicle
2019PolarisSportsman XP 1000LETwo kits required per vehicle
2018PolarisSportsman XP 1000LETwo kits required per vehicle
2017PolarisSportsman XP 1000Matte Copper LETwo kits required per vehicle
2020PolarisSportsman XP 1000PremiumTwo kits required per vehicle
2015PolarisSportsman XP 1000PursuitTwo kits required per vehicle
2021PolarisSportsman XP 1000STwo kits required per vehicle
2020PolarisSportsman XP 1000STwo kits required per vehicle
2015PolarisSportsman XP 1000Titanium Matte Metallic LETwo kits required per vehicle
2021PolarisSportsman XP 1000TouringTwo kits required per vehicle
2020PolarisSportsman XP 1000TouringTwo kits required per vehicle
2019PolarisSportsman XP 1000TouringTwo kits required per vehicle
2018PolarisSportsman XP 1000TouringTwo kits required per vehicle
2017PolarisSportsman XP 1000TouringTwo kits required per vehicle
2016PolarisSportsman XP 1000TouringTwo kits required per vehicle
2015PolarisSportsman XP 1000TouringTwo kits required per vehicle
2016PolarisSportsman XP 1000Touring LimitedTwo kits required per vehicle
2015PolarisSportsman XP 1000Touring Pearl White LETwo kits required per vehicle
2021PolarisSportsman XP 1000TrailTwo kits required per vehicle
2020PolarisSportsman XP 1000TrailTwo kits required per vehicle
2009PolarisSportsman XP 550EFITwo kits required per vehicle
2009PolarisSportsman XP 550EFI EPSTwo kits required per vehicle
2014PolarisSportsman XP 850--Two kits required per vehicle
2014PolarisSportsman XP 850BrowningTwo kits required per vehicle
2011PolarisSportsman XP 850BrowningTwo kits required per vehicle
2011PolarisSportsman XP 850Browning EPSTwo kits required per vehicle
2010PolarisSportsman XP 850Browning EPSTwo kits required per vehicle
2011PolarisSportsman XP 850EFITwo kits required per vehicle
2010PolarisSportsman XP 850EFITwo kits required per vehicle
2009PolarisSportsman XP 850EFITwo kits required per vehicle
2011PolarisSportsman XP 850EFI EPSTwo kits required per vehicle
2010PolarisSportsman XP 850EFI EPSTwo kits required per vehicle
2009PolarisSportsman XP 850EFI EPSTwo kits required per vehicle
2013PolarisSportsman XP 850HOTwo kits required per vehicle
2012PolarisSportsman XP 850HOTwo kits required per vehicle
2014PolarisSportsman XP 850HO EPSTwo kits required per vehicle
2014PolarisSportsman XP 850LE Browning HO EPSTwo kits required per vehicle
2014PolarisSportsman XP 850LE HO EPSTwo kits required per vehicle
2012PolarisSportsman XP 850PursuitTwo kits required per vehicle
2011PolarisSportsman XP 850PursuitTwo kits required per vehicle
2014PolarisSportsman XP 850Pursuit HO EPSTwo kits required per vehicle
2010PolarisSportsman XP 850Touring EPSTwo kits required per vehicle

Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W6.0000” x H2.0000” x L9.0000”
  • Free Shipping!

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