7638 Grill Grates for Weber Spirit I & Spirit II 300 Series - Reliable

Our review of the 7638 Grill Grates explains why these cast iron replacement grates are a practical option for owners of compatible Weber Spirit and Genesis grills who want solid heat retention and straightforward installation. The 2-pack set measures 17.5 x 11.9 in each and is sold as a pair that covers an entire cooking area, making it a direct replacement for original part # 7638 and compatible numbers noted by the manufacturer. For anyone needing durable, heavy-duty grates without premium brand pricing, these deliver reliable performance and long-term use.

Key Features

• Precise fit: Each grate measures 17.5 x 11.9 in so the pair matches the expected dimensions of Spirit I & Spirit II 300 series models for an accurate replacement.
• Direct replacement: Designed as a replacement for Spirit E/S-310, E/S-320, E/S-315, E/S-330 and many Genesis Silver/Gold/Platinum B and C models, simplifying part selection.
• Cast iron construction: High-quality cast iron provides strong heat retention and searing capability for consistent grill marks and even cooking.
• Durability: Heavy cast-iron build resists warping under high temperatures and repeated use, extending working life on busy grills.
• Value pack: Two grates are included to cover the full 17.5 x 23.8 in cooking surface, avoiding partial replacements and saving installation time.
• Original part compatibility: Matches the original part number 7638 and is listed as a substitute for several original Weber part numbers for easier sourcing.

Who It's For

This set is best for owners of compatible Weber Spirit I & Spirit II 300 series gas grills and the listed Genesis models who need an affordable, durable replacement that delivers strong searing and heat retention. It suits people who prefer cast-iron grates for their ability to hold heat and create defined grill marks.

Those who should look elsewhere include owners of Weber Genesis 300 series grills, since these grates are not compatible, and buyers seeking lightweight, rust-proof materials like stainless steel - cast iron requires periodic care to maintain seasoning and rust resistance.

Pros & Cons

Pros

• Solid fit and straightforward installation on supported Spirit and Genesis models.
• Cast iron provides excellent heat retention and consistent searing performance.
• Two-piece set covers the full cooking area, offering good value for replacement buyers.
• Durable construction resists warping under high temperatures.

Cons

• Not compatible with Weber Genesis 300 series, so model verification is required before purchase.
• Cast iron needs maintenance to prevent rust; it is not as low-maintenance as stainless options.

Specifications

Material	Cast iron
Quantity	2-pack (pair of grates)
Single grate size	17.5 x 11.9 in
Total covered area	17.5 x 23.8 in (pair)
Replaces	Original part # 7638; also listed as replacement for 7639, 7525
Compatible models	Spirit I & Spirit II 300 series, Genesis Silver/Gold/Platinum B C, Genesis 1000-5000 side control

Our Verdict

The 7638 cast iron grill grates are a sensible, value-focused replacement for owners of supported Spirit and Genesis models who want dependable heat retention and searing. They are well suited to gridded cooking and heavy use, though buyers should confirm model compatibility and be prepared to maintain the cast-iron finish to prevent rust. For most compatible grill owners, they offer strong performance at a reasonable cost.

Frequently Asked Questions

Will these grates fit my Spirit 320?
Yes, the grates are listed as compatible with Spirit E/S-320 and similar Spirit I & II 300 series models when dimensions match.

Are these the same size as the original parts?
Each grate measures 17.5 x 11.9 in and the pair covers 17.5 x 23.8 in, matching the original part # 7638 dimensions specified by the maker.

Do they come pre-seasoned to resist rust?
The product is cast iron and customers report good rust resistance after proper seasoning, but routine maintenance is recommended to preserve the finish.