Polaris RZR 4 900 2" Forward Offset Boxed A-Arms

Your A-arms work hard every time you hit the trail—whether you're picking your way through rocks or pushing through mud. Stock arms bend and flex under real abuse. These boxed A-arms are built to handle it. With a 2-inch forward offset, they let you fit 30-inch tires without needing a lift kit, and the extra ground clearance keeps you from hanging up on logs, rocks, and rough terrain.

This is a complete A-arm set for your Polaris RZR 4 900 (2015–2018). They come with adjustable pivot blocks already set to factory specs, so your camber stays dialed in whether you're running a lift, extra gear, or just tackling rougher trails. If you want to add ball joints, you can pick from four options at checkout—SuperATV can pre-install them for free if you choose that route. Otherwise, you'll reuse your stock ball joints.

The arms themselves use 1/8-inch steel plating with internal gussets welded throughout for real strength—no weak spots. SuperATV applies a UV-resistant powder coat to keep rust at bay. Preinstalled UHMW bushings are already in place, so you don't have to hunt down extras. These are designed to take years of hard riding without cracking or bending.

Super Duty 300M: Built from 300M-grade steel, these are 2.25 times stronger than stock. Greaseable design and adjustable steel-on-steel construction means you can service them when needed.

Keller Brand: Two-piece design that threads on like a bolt—nearly impossible to pull apart. Chromoly stud with tool-steel body. Greaseable and rebuildable for long-term maintenance.

Heavy Duty: Hardened 4340 VAR steel with zinc plating can handle double the stress of OEM joints. Comes with accessible grease zerks and adjustable geometry.

Standard Duty: Chromoly steel studs and housings with zinc plating. Matches or beats stock strength at a better price.

The adjustable pivot blocks let you dial in camber as your setup changes—add a lift kit or heavier bumpers, and you can still keep things square. A lifetime warranty backs these arms against manufacturing defects. Fitment is confirmed for 2015–2018 Polaris RZR 4 900 models.