GGC Cast-Iron Grill Grates for Weber Genesis II 300 Series — 18.75" x 12.75" 2‑Piece Replacement, Heavy‑Duty Searing

GGC 18.75" cast-iron grill grates are a two-piece replacement set designed to restore heat retention and searing performance to compatible Weber Genesis II 300 and LX 300 series grills.

These heavy-duty grates are engineered to match the footprint of many recent Weber Genesis II models and select KitchenAid equivalents, offering thick matt cast iron that holds heat for crisper sears and long-lasting durability. They measure 18.75 x 12.75 inches each (25.5 inches combined) and come as a two-piece set intended to replace OEM part numbers like Weber 66802 and 66095. Before buying, compare the listed dimensions and your grill’s existing grates to ensure correct fit.

Will these grates fit my Weber Genesis II E-310, S-310 or similar models?

Yes — these grates are made to fit many 300-series Genesis II and LX 300 grill variants produced in 2017 and later. They are compatible with a range of model suffixes (E, S, SE, CE, CSE, CSS) and some KitchenAid models that use the same grate footprint.

• Explicit fit list includes E-310, E-315, E-325, E-330, E-335, S-310, S-335, S-345 and LX S-340 / E-340.
• Replaces Weber part numbers 66802, 66095, 66805 and 7599.
• Also fits KitchenAid parts 720-0954 and 720-0954A where sizes match.
• Always measure your current grates and compare to 18.75 x 12.75 in per piece.

How do these cast-iron grates improve cooking performance?

Cast iron stores and releases heat more evenly than many thin factory grates, helping foods brown and develop distinct grill marks. The mass of the material keeps temperatures steady when the lid opens, which helps maintain consistent searing and finish.

• High thermal mass for stronger sear and consistent heat.
• Matte cast-iron finish promotes even browning and grill marks.
• Non-stick when properly seasoned or oiled before use.
• Durable surface resists warping under regular grilling heat.

How should I care for and maintain these grates?

Cast-iron grates require simple, regular upkeep: season them periodically, avoid long-term moisture exposure, and scrape away food after each use. Proper maintenance extends life and preserves the non-stick cooking surface.

• Season with high-smoke-point oil after cleaning and before first use.
• Brush or scrape while warm to remove debris, then wipe with oil.
• Dry fully after cleaning to prevent rust; store indoors if not used for months.
• Use gentle cleaners; avoid soaking in water for long periods.

What are the exact dimensions and what should I check before ordering?

Each grate measures 18.75 inches long by 12.75 inches wide; the two-piece set spans 25.5 inches when placed side-by-side. Matching dimensions to your grill is the most reliable way to confirm fit.

• Single grate: 18.75" x 12.75" (length x width).
• Two-piece total footprint: 18.75" x 25.5" combined width.
• Compare with your grill’s existing grate layout and mounting points.
• Check compatibility list for model examples and OEM replacements.

Who is this for: Grillers who own a compatible Weber Genesis II 300-series or LX 300 grill (or certain KitchenAid models) and want heavy-duty cast-iron grates to boost searing, heat retention, and longevity. This two-piece set suits backyard cooks who value strong grill marks and a durable cooking surface, and who are willing to season and maintain cast-iron cookware for best results.