Factory rear knuckles on a Polaris RZR XP Turbo S are built for stock riding. Hit a rock or a hard landing with the throttle down and a cast knuckle can crack, ending the ride on the spot. These Billet Rear Knuckles are machined from 7075 aluminum and are two times stronger than the factory parts, made for the kind of riding that makes your heart rate jump.
Highlights
- 7075 billet aluminum construction
- Twice as strong as factory knuckles
- Matches OEM dimensions
- Works with stock and aftermarket suspension and wheel bearings
- Extra clearance built in for better compatibility
- Left and right rear knuckles included
- Replaces OEM 5141782 (LH carrier) and 5141783 (RH carrier)
Double the Strength
7075 is one of the strongest aluminum alloys made, far stronger than the cast material used for stock knuckles. Machined from solid billet, these knuckles give you double the strength so you can keep the pedal down when the trail gets rough.
Bolts Up Like Stock
Because they match OEM dimensions, the knuckles work with the stock trailing arms, radius arms, axles and bearings, as well as aftermarket suspension parts. Built-in extra clearance helps with compatibility further. No guessing, no modifications.
When Billet Knuckles Make Sense
If you've ever cracked a rear knuckle, run big tires or portal-free lifts, or ride rocky desert terrain at speed, billet knuckles remove one of the most common rear-end failures.
What's in the Box
- Left and right billet rear knuckles
Who It's For and What Pairs Well
For aggressive Turbo S riders and builds with larger tires. Strengthen the rest of the rear suspension with parts from RZR Turbo S radius arms, RZR Turbo S trailing arms and RZR Turbo S axles.
Fitment
| Year | Make | Model |
|---|---|---|
| 2018-2021 | Polaris | RZR XP Turbo S |
| 2019-2021 | Polaris | RZR XP 4 Turbo S |
| 2019+ | Polaris | RZR XP Turbo S Velocity |
| 2019+ | Polaris | RZR XP 4 Turbo S Velocity |
Replacement for OE Part Numbers
- 5141782 - LH Carrier
- 5141783 - RH Carrier
Installation Notes
Remove the wheel, brake caliper, axle nut and radius arm bolts, then swap the knuckle and transfer or replace the wheel bearing. Torque all hardware to factory spec.
- source:
- superatv
- satv_url:
- https://www.superatv.com/polaris-rzr-turbo-s-billet-rear-knuckles
- fitment_raw:
- Polaris RZR XP Turbo S 2018-2021; Polaris RZR XP 4 Turbo S 2019-2021; Polaris RZR XP Turbo S Velocity 2019+; Polaris RZR XP 4 Turbo S Velocity 2019+
- install_pdf:
- https://madmin.superatv.com/amfile/file/download/file/5046/product/26109/
- desc_status:
- rewritten_2026-10-26
