Uniflasy cast iron grill grates for Weber Spirit & Genesis — 17.5 x 11.9 in pair, heavy-duty searing

These Uniflasy heavy-duty cast iron grates are a direct-fit replacement for many Weber Spirit and Genesis three-burner grills, delivering superior heat retention and bold searing performance.

If your original grill grates are warped, chipped, or losing heat, this pair of cast iron cooking grates (each 17.5 x 11.9 inches) offers a durable upgrade tailored to a wide range of Weber Spirit 300/700 and Genesis models. Engineered to match OEM mounting points and spacing, the Uniflasy set brings consistent surface temperature, stronger sear marks, and longer service life compared with thin or damaged enamel options.

Which Weber and Genesis models will these grates fit?

These grates are designed for compatibility with many Spirit and older Genesis lines. They fit Spirit 300-series and Spirit 700 grills, and several Genesis models from 2000–2010 as noted below.

• Compatible: Spirit E310, S310, E315, S315, E320, E330, S320, S330, Spirit 700
• Works with: Genesis 1000–3500, Genesis Gold B/C, Silver B/C (2002+), Platinum 2000–2010
• Not compatible: Genesis Silver A and certain Genesis II LX configurations
• Fits common part numbers such as 45010001, 46510001, 47510001, 46810001

How do these cast iron grates affect cooking performance?

Cast iron stores and spreads heat more evenly than thinner metal grates, which helps maintain stable cooking temperatures and creates pronounced sear marks. They’re particularly useful for high-heat grilling and foods that benefit from quick caramelization.

• Superior heat retention for steady grill temperatures
• Enhanced searing and grill marks on steaks, burgers, and vegetables
• Even surface heat reduces cold spots across the cooking area
• Durable weight resists warping under repeated high-heat use

What are the material and care considerations for these grates?

Made from solid cast iron, these grates need basic maintenance to stay rust-free and nonstick. Regular seasoning and proper cleaning extend life and preserve cooking performance.

• Solid cast iron construction resists chipping compared to enamel-coated parts
• Season with oil after cleaning to build a protective nonstick layer
• Use a grill brush or scraper; avoid harsh soap and immediate soaking
• Store dry or indoors during long idle periods to prevent corrosion

Will installation be straightforward and what size should I expect?

Installation is designed to be simple—these grates match the original mounting points and slide into the same supports used on compatible Weber and Genesis models. Each grate is sized to combine into a full two-piece cooking surface.

• Each grate measures 17.5 x 11.9 inches; total coverage 17.5 x 23.8 inches
• Direct-fit replacement for many three-burner Weber Spirit and listed Genesis grills
• No modification required for supported models; straightforward swap-out
• Also available in a stainless-steel alternative (see referenced ASIN)

Who is this for: Grill owners with a Weber Spirit 300-series, Spirit 700, or supported Genesis model who want a long-lasting upgrade for better heat control and searing. These Uniflasy cast iron grates suit backyard cooks who prioritize durable materials and restaurant-style grill marks, and anyone replacing warped or failing original grates from the compatible model list. They’re not the right choice for incompatible Genesis variants, so verify your model number before purchasing.