Overlanding an Xpedition means loading the front end for days at a time, and the OEM ball joint is held in by a snap ring that can break and let the joint push out. Keller ball joints remove that failure point completely. The threaded housing screws into your A-arm like a nut and bolt, so there is no clip to deform — end-to-end 4340 hardened chromoly, greaseable and rebuildable.
Todd Keller's original design, covering Xpedition ADV and XP models including the five-seat trims, from 2024 onward.
Key Features
- Threaded housing eliminates the OEM snap ring
- End-to-end chromoly construction in hardened 4340 alloy
- Adjustable and greaseable so they run like new on every trip
- Rebuildable rather than disposable
- No A-arm modification required
- Backed by a lifetime warranty
- Made in USA
Built To Solve: Xpedition Ball Joint Failure Far From the Trailhead
- Snap ring breaking and allowing the joint to push out of the A-arm
- Front-end clunk that appears once the machine is loaded for a trip
- Play in the wheel when rocked top-to-bottom on a jack
- Repeat OEM joint failures on an Xpedition carrying gear, racks and a roof load
- Torn boots admitting water and grit on long, wet, multi-day routes
- A breakdown risk you cannot fix a long way from a dealer
Best For: Loaded Overlanding and Long-Range Xpedition Builds
- ADV and XP owners running racks, storage and a full camp load
- Riders covering long multi-day routes away from support
- Five-seat ADV 5 and XP 5 owners carrying more weight through the front end
- Owners running added lift or larger tires
- Anyone who would rather service a joint than be stranded by one
Specifications
- Material: hardened 4340 chromoly alloy, stud and housing
- Design: two-piece threaded housing, no snap ring
- Serviceability: adjustable, greaseable and rebuildable
- A-arm modification: not required
- Positions: upper and lower sold separately, as a matched pair, or as a set of four
- Warranty: lifetime
- Manufacturer Part Number: BJK-P-XP1KT#AC (upper, one joint), BJK-P-XP1KT-K-2#AC (upper, two joints), BJK-P-XPD-001-L#AA (lower, one joint), BJK-P-XPD-001-L-K#AA (lower, two joints), BJK-P-XPD-001-L-K-2#AA (one upper and one lower), BJK-P-XPD-001-L-K-4#AA (two uppers and two lowers)
Fitment
- Polaris Xpedition ADV NorthStar, ADV Premium, ADV Ultimate: 2024 onward
- Polaris Xpedition ADV 5 NorthStar, ADV 5 Premium, ADV 5 Ultimate: 2024 onward
- Polaris Xpedition XP NorthStar, XP Premium, XP Ultimate: 2024 onward
- Polaris Xpedition XP 5 NorthStar, XP 5 Premium, XP 5 Ultimate: 2024 onward
Both the two-row and five-seat trims are covered across ADV and XP. Coverage begins in 2024 and remains open on current machines. Fitment is not guaranteed on applications not listed above.
FAQ
Why do Xpedition ball joints push out of the A-arm?
The OEM joint relies on a snap ring seated in a groove to hold it in place. That ring can break — Keller calls it the biggest weak spot in the stock design — and once it does, the joint has nothing retaining it. Keller joints thread into the arm instead, so no clip is carrying the load.
Do these fit the five-seat ADV 5 and XP 5?
Yes. ADV 5 and XP 5 in NorthStar, Premium and Ultimate trims are all covered from 2024 onward, the same as the two-row models.
Do I need uppers, lowers, or both?
Uppers and lowers are separate parts, sold individually so you can replace just what failed. Read the kit options closely: the two-joint choices are either two lowers or one upper and one lower, and the set of four covers a complete front end.
Do these require A-arm modification?
No. Standard Keller joints thread straight into the factory arm. Only the oversized Mega version needs machined A-arms, and no Mega joint is published for the Xpedition.
Are they worth it if I mostly ride loaded but not aggressively?
Weight is the point. A fully loaded overlanding machine puts sustained load through the front end even at moderate speed, and that is the condition where snap ring retention is least forgiving. The upgrade is about eliminating a failure mode, not chasing performance.
Can these be rebuilt rather than replaced?
Yes. They grease and adjust, and the Keller ball joint rebuild kit for Polaris restores them with a new cup, boot and pin when the internals wear.
Why Keller
Todd Keller designed the two-piece threaded ball joint to fix the one part of a stock front end that keeps failing, and SuperATV now builds and backs the line. The design has barely changed because it does not need to: thread the housing in like a nut and bolt, use a chromoly stud, and make the whole assembly serviceable so a worn joint gets rebuilt rather than binned.
Finish Your Xpedition Overlanding Build
Before ordering, confirm whether you have an ADV or XP, and whether it is a two-row or five-seat model, then decide between a single replacement and a full front-end set. If the joints are sound but a boot has torn, the Keller boot replacement kit is the cheaper repair. If the joints are worn but the housings are good, the Keller rebuild kit for Polaris services them. Riders building for long routes usually carry a rebuild kit as a trail spare once the joints are in.
Installation Video
Official SuperATV installation walkthrough with Todd Keller: How To Install Keller Ball Joints
