Polaris RZR XP 1000 ball joints pull out of the A-arm because a thin snap ring is the only thing holding them in. Keller ball joints delete that snap ring entirely. The two-piece housing threads into the A-arm like a nut and bolt, so there is nothing to shear or pop loose under load. Hardened 4340 chromoly, greaseable and rebuildable, and a direct fit on 2014-2023 RZR XP 1000 and XP 4 1000.
Todd Keller's original two-piece design is what the rest of the industry copied. Buy them one at a time to replace a failure, or as a set of four to do the whole front end at once.
Key Features
- 4340 hardened chromoly steel construction
- Two-piece threaded design doesn't require a snap ring
- Easily adjustable, rebuildable, and greaseable
- Robust boot retaining ring prevents water intrusion
- No A-arm modification required, unlike the Mega version
- Sold individually, in pairs, or as a set of four
Built To Solve: RZR XP 1000 Ball Joint Pull-Out and Snap Ring Failure
- Snap ring shears and the joint separates from the A-arm, usually at the worst possible moment
- Clunking or knocking from the front end over rough ground
- Play in the wheel when you rock it top-to-bottom on a jack
- Repeat OEM ball joint failures on a machine running a lift, portals, or oversized tires
- Torn boots letting water and grit into the joint, so it wears out from the inside
- Replacing joints often enough that you have started buying them in pairs
Best For: Lifted RZR XP 1000 Builds and High-Hour Trail Machines
- XP 1000 and XP 4 1000 owners running larger tires, a lift kit, or portal gears
- Riders who have already replaced OEM joints more than once
- Desert and dune riders loading the front end hard on landings
- Rock and trail riders who need a joint they can grease and rebuild rather than discard
- Anyone rebuilding a front end and wanting to do it once
If your A-arms are already modified for oversized housings, or you are building for maximum strength and accept the extra install work, look at the Mega Keller version instead.
Specifications
- Material: 4340 hardened chromoly steel
- Design: two-piece threaded housing, no snap ring
- Serviceability: greaseable, adjustable, and rebuildable
- Boot: retaining ring designed to prevent water intrusion
- A-arm modification: not required
- Sold as: 1 ball joint, 2 ball joints, or 4 ball joints
- Manufacturer Part Number: BJK-P-XP1KT (single), BJK-P-XP1KT-K-2 (pair), BJK-P-XP1KT-K-4 (set of four)
Fitment
- Polaris RZR XP 1000: 2014-2023
- Polaris RZR XP 4 1000: 2014-2023
- Polaris RZR XP 1000 High Lifter Edition: 2015-2023
- Polaris RZR XP 1000 Trails & Rocks Edition: 2017-2023
The 2024+ RZR XP is a different machine and uses a different Keller joint. Fitment is not guaranteed on applications not listed above.
FAQ
Why do OEM RZR XP 1000 ball joints pull out of the A-arm?
The OEM joint is retained by a snap ring pressed into a groove in the A-arm. Under a hard landing or the extra leverage of bigger tires, that ring can deform or shear and the joint separates. Keller ball joints remove the snap ring from the equation by threading the housing into the A-arm itself.
Will these hold up with a lift kit and oversized tires?
That is the situation they are built for. Larger tires and added lift increase the load and leverage on the joint, which is exactly when snap ring retention tends to let go. The threaded two-piece housing does not rely on a clip to stay put.
Do these fit the RZR XP 4 1000?
Yes. The four-seat XP 4 1000 is covered for 2014-2023, as are the High Lifter and Trails & Rocks editions. The 2024+ RZR XP is a separate platform with its own Keller joint.
Do Keller ball joints require A-arm modification?
Standard Keller ball joints do not. The Mega Keller version uses an oversized housing and does require your A-arms to be modified, which is the main reason to choose one over the other.
How are Keller ball joints installed?
They thread into the A-arm rather than pressing in behind a clip. Todd Keller walks through the process in the official SuperATV install video linked below. Budget time for greasing and setting them properly, and have the machine safely supported before you start.
How many should I buy?
Ball joints wear as a set. Replacing a single failure is fine, but on a high-hour machine most riders do all four at once so the front end is consistent and you are not back under it in a month. The set of four covers a complete front end.
Why Keller
Todd Keller designed the two-piece threaded ball joint to fix the one part of a stock front end that keeps failing. SuperATV now builds and backs the line. The design has stayed essentially unchanged because it works: thread the housing in like a nut and bolt, use a chromoly stud, and make the whole thing serviceable so a worn joint gets rebuilt instead of thrown away.
Complete Your RZR XP 1000 Front End Rebuild
Before ordering, confirm your model year falls in the 2014-2023 range and decide whether you are replacing one joint or refreshing all four. If your boots are torn but the joints are sound, a boot replacement kit may be all you need. If the joints are worn but the housings are good, the Keller rebuild kit for Polaris services them rather than replacing them. Riders doing a full front end at this mileage usually pair new ball joints with a fresh set of A-arms or a look at their tie rods while everything is apart.
Installation Video
Official SuperATV installation walkthrough with Todd Keller: How To Install Keller Ball Joints
