Material first, coverage second. Here is the honest comparison:
| UHMW plastic | Aluminum | |
|---|---|---|
| How it takes a rock | Slides over it quietly and springs back — no dents | Rigid protection that can dent and transmit noise |
| Weight | Heavier per square foot at 3/8 in. and up | Lighter for the same coverage |
| Longevity | Will not crack or corrode and shrugs off repeat hits | Dents accumulate but keep protecting |
| Best for | Rock crawling, technical trails, the machine that grinds its belly | Budget builds, mixed terrain, weight watchers |
| Typical spend | Higher per piece | Lower to mid |
Coverage is a ladder. Guards protect single components: A-arm and CV boot guards run about $160 to $280 and defend the suspension pieces a full plate cannot reach. Partial kits and rock sliders cover the floorboards and sides. Full plates armor the whole belly. Complete multi-piece sets do all of it in one purchase.
What to budget. Three honest tiers, straight from the grid. Budget-friendly: guards and small protection pieces from $19.95 hardware up through A-arm and CV sets around $160 to $280 — the smart starting point if the suspension arms are your worry. The sweet spot, where most RZR 4 owners land: full skid plates from $484 to $930, with most of the 3/8 in. UHMW plates settling around $700 — the whole belly covered, most of the bells and whistles, moderate price. The premium tier: complete multi-piece sets with integrated sliders from about $1,300 to $1,850, the buy-once answer for the machine that lives in the rocks. Every listing shows its exact price. The most common warranty is between 3–6 months, but Everything Polaris RZR does offer extended 1- and 2-year warranties on all products if that is something you are interested in — you can add the extended warranty right at checkout. Most items ship within 24 hours, any exceptions show a lead time right on the product page, and everything carries our risk-free 90-day return policy. See what RZR owners say about us.
Q: UHMW or aluminum — which should I buy? Match it to how you ride. UHMW slides over rock quietly, never dents and shrugs off the repeat hits of technical crawling, which is why the serious rock machines run it. Aluminum costs less for the same coverage, weighs less and protects fine on mixed terrain — it just dents and tells you about every impact. If the machine grinds its belly regularly, spend up on UHMW. If rocks are occasional, aluminum protects the investment for less.
Q: Do I need a full plate or just guards? Start with what your terrain attacks. A full plate defends the tank, frame and drivetrain from below. A-arm and CV boot guards defend the suspension pieces that hang outside a plate's footprint — and torn CV boots are the most common trail casualty on this platform. Riders in real rock country usually end up with both, which is exactly what the complete multi-piece sets bundle.
Q: Will two-seat RZR skid plates fit my RZR 4? No. Plates are cut to the wheelbase and the 4's is longer, so the four-seat versions on this page are the only correct fit. Every listing names its exact models — and when a listing names one machine and you drive another, text us before ordering. It is a thirty-second answer.
Q: Isn't the factory skid plate good enough? For gravel roads, maybe. The stock plate is thin plastic that serious terrain punches through, and the components behind it — tank, boots, axles — cost far more than the armor that protects them. One punctured floorboard pays for a full UHMW plate several times over. That math is the whole category.
Written and reviewed by the Everything Polaris RZR fitment and marketing team — riders and product specialists who work with these machines daily. Spot an error, or have a suggestion that would make this guide more helpful? Email us at marketing@gearup2go.com — we read every note. Last updated: July 2026