The XD137 FMJ wheel by XD Wheels is a stylish and durable option for those looking to enhance the appearance and performance of their vehicle. Here's a detailed description based on the information gathered:

1. Design:

   • The XD137 FMJ wheel boasts an 8-spoke, D-window design which is complemented by a dual simulated beadlock design and a step-down feature, adding a rugged and aggressive look to your vehicle​​.

2. Sizes and Finish:

   • It comes in popular 16, 17, and 20-inch sizes, fitting a variety of trucks and SUVs. You have the option to choose between a Satin Black or Satin Black with Dark Tint finish, allowing for a personalized look that matches your vehicle's aesthetics​​.

3. Specifications:

   • The wheels are available in a variety of specifications to ensure a proper fit for your vehicle. Some key specs include:
     • Bolt Pattern: Ranges from 5X127/5X139.7 to 6X135/6X139.7 depending on the size chosen.
     • Backspace: Varies between 4.53 to 5.00 inches.
     • Offset: Ranges from -44mm to 00mm.
     • Bore: Either 78.10 or 106.10 depending on the model.
     • Weight: Ranges from 34.10 lbs to 49.00 lbs.
     • Load Capacity: All models have a load capacity of 2500 lbs.
     • Lip Size: Varies from 1.50 to 1.90 depending on the model chosen​​.

4. Performance and Durability:

   • The phrase Strength when needed, speed when necessary, show-stopping style always captures the essence of the XD137 FMJ wheel's performance. It's built to endure tough driving conditions while offering a visually appealing look that doesn't compromise on performance​​.

5. Material:

   • The listing on Amazon mentions the inclusion of Chromium (hexavalent compounds) in the construction, hinting at a robust and durable material composition, although the exact material isn't specified​​.

6. Fitment:

   • It's essential to verify the wheel fitment with the manufacturer's guide to ensure compatibility with your vehicle. The official XD Wheels website provides a feature to view this wheel on your vehicle to guarantee fitment​​.

The XD137 FMJ wheels by XD Wheels blend a unique design with practical features, making it a great choice.