onlyfire Cast Iron Grill Grate Replacement Gourmet BBQ Syste

The Verdict

If you’ve cooked on a stock Weber 22" kettle grate for more than a season, you know the frustration: thin steel rods that warp, flare-ups that char everything, and heat that vanishes the second you open the lid. The onlyfire Cast Iron Grill Grate Replacement aims to fix all three. After 225 Amazon ratings averaging 4.5 stars, it’s clearly doing something right. But cast iron isn’t a set-and-forget upgrade — let’s talk about what you’re really getting.

What’s in the box

The package includes the main cast iron grate (three hinged sections), a removable 9-inch center circle, and a stainless steel wok ring adapter. No tools, no hardware, no seasoning oil — it arrives bare cast iron, so plan to season it before first use. The total weight lands around 12 pounds, which tells you immediately this isn’t the flimsy stamped steel that came with your kettle.

Build quality and real-world performance

The rods are a genuine 8mm thick — nearly double the stock grate’s thickness. That mass is the entire game here. Cast iron absorbs heat slowly but releases it steadily, which means you get a proper sear on steaks without the center of the grate going cold after you load it with protein. One reviewer put it simply: “Steaks come out with a crust you literally cannot achieve on the original grate.”

The center removable section is the standout feature. Pop it out, drop in the included wok ring, and you’ve got a legit stir-fry station or a griddle surface for smash burgers. It transforms a basic kettle into something closer to a Gourmet BBQ System — at a fraction of Weber’s OEM price. The three hinged sections let you add charcoal without lifting the entire grate, which is genuinely useful for two-zone cooking.

Fit on a 22" Weber kettle is exact. No gaps, no rocking, no bending tabs to make it seat properly. It sits flush with the bowl’s rim, and the handles stay cool enough to grab with a bare hand during a long cook.

What buyers consistently praise

The sear marks are the headline. Multiple reviewers note the crust development on steaks and chops is dramatically better than any steel grate they’ve owned. Heat retention gets equal love — one buyer wrote, “Grilled corn and veggies for 20 people without the temp dropping once.” The wok conversion earns frequent mention too, with several owners saying it replaced their standalone wok burner for outdoor cooking.

Where it falls short

Let’s be direct: cast iron is maintenance. If you leave this grate in the rain, it will rust. If you scrub it with soap, you’ll strip the seasoning. It needs a thin oil coat after every use and immediate drying if you wash it. That’s the tradeoff for the performance. Several reviewers who skipped seasoning entirely reported rust within weeks — this isn’t a defect, it’s the material’s nature.

The weight is a real consideration. Lifting a 12-pound grate one-handed to add coals is awkward, especially when it’s hot. The hinged sections help, but they’re stiff until broken in. Also note: the wok ring only works with flat-bottomed woks, not traditional round-bottom ones — a detail buried in the product description that’s caught a few buyers off guard.

Who should buy this

This grate is for the backyard cook who’s ready to move past basic grilling and wants steakhouse-level sears without buying a separate cast iron skillet. It’s ideal for Weber kettle owners who use their grill multiple times a week and don’t mind ten minutes of post-cook care. If you’re a casual, once-a-month griller who leaves the grill uncovered in the elements, stick with your stock grate — you’ll fight rust more than you’ll enjoy the sear marks.

FAQ

Will this fit my Weber 22" Original Kettle Premium? Yes — it’s designed for all 22" Weber kettle models (Original, Premium, Master-Touch). The only exception is the older 18.5" kettles, which need a different size.

Do I need to season it before first use? Yes, absolutely. Wash it with hot soapy water, dry completely, then coat with a high-smoke-point oil (canola or grapeseed) and heat it on the grill for 30–45 minutes. Skip this and you’ll get rust, not sear marks.

Can I use it with a gas grill? No — this is specifically sized for Weber 22" charcoal kettles. The dimensions won’t match most gas grills.

The Verdict

Buy it if: You own a 22" Weber kettle, you’re serious about sear quality, and you’re willing to spend five minutes oiling the grate after each cook. The combination of thick cast iron, the removable center section, and the exact Weber fit makes this a legitimate performance upgrade at a reasonable price.

Skip it if: You want zero-maintenance grilling, you leave your grill exposed to weather, or you prefer the lightweight feel of steel grates. This is a tool for cooks, not a set-and-forget accessory.

Rating: 4.6/5 — Deducting half a star for the maintenance burden and the wok ring’s flat-bottom limitation. Otherwise, this is the best sub-$100 upgrade you can make to a Weber kettle.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.