Frequently Asked Questions About Peterbilt 387 Air Tanks, Wraps & Mounting

What air tank sizes are compatible with my Peterbilt 387, and how do I determine the right fit?

The Peterbilt 387 typically accommodates air tanks ranging from 11" to 13" in diameter, with lengths varying from 20" to 30" depending on your truck's configuration. To determine the correct size, measure your existing tank's diameter and length, or check the data plate on your current tank. Most 387 models from 2000-2011 use standard 11" diameter tanks, but always verify your specific setup as custom configurations may vary. Consider your air system requirements and available frame space when selecting replacement tanks.

Can I install these air tank wraps and mounting brackets myself, or do I need professional help?

Most air tank wraps and basic mounting brackets can be installed with standard hand tools and moderate mechanical experience. Wraps typically require removing the tank, cleaning the surface, and securing with provided hardware or straps. However, replacing air tanks or modifying mounting systems requires disconnecting air lines, which involves depressurizing the system and potentially adjusting brake components. If you're not comfortable working with air brake systems, professional installation is recommended to ensure DOT compliance and safety.

What's the difference between aluminum and steel air tanks for my 387?

Aluminum tanks are lighter (typically 40-50% less weight than steel), resist corrosion better, and help improve fuel economy. Steel tanks are more affordable upfront, extremely durable against physical damage, and better suited for harsh winter conditions where road salt is minimal. For Peterbilt 387s operating in corrosive environments or weight-sensitive applications, aluminum is preferred. Steel remains popular for heavy-duty applications where impact resistance is crucial. Both meet DOT requirements when properly maintained.

Will aftermarket air tank mounting brackets fit my specific year Peterbilt 387?

Most universal mounting brackets fit Peterbilt 387 models from 2000-2011, but frame rail spacing and tank positioning can vary based on wheelbase and factory options. Measure your frame rail width (typically 34" outside-to-outside) and current bracket spacing before ordering. Some 387s with extended wheelbases or custom suspensions may require adjustable brackets. Always verify bracket load ratings match or exceed your tank weight, and ensure mounting holes align with existing frame holes to avoid drilling.

How do I know when my air tank wraps need replacement, and what materials last longest?

Replace air tank wraps when you notice fraying, loose straps, rust bleeding through, or exposed tank surface. Quality stainless steel wraps typically last 5-7 years, while polished aluminum wraps can last 8-10 years with proper maintenance. Heavy-duty rubber-backed wraps provide the best protection against vibration damage but may trap moisture if not properly ventilated. Inspect wraps every 6 months for signs of wear, especially at contact points with mounting brackets. Choose wraps with drainage slots to prevent moisture accumulation.