What is the bolt pattern on a Ram 4500?
The Ram 4500 commonly uses an eight-lug bolt pattern on a 165.1 mm circle (8x165.1 mm), equivalent to 8 bolts on a 6.5-inch bolt circle. This pattern is standard across most Ram heavy-duty 4500/5500 chassis-cab models, including dual-rear-wheel configurations. If you’re shopping for wheels or tires, this is the pattern you’ll typically need.
Understanding the Ram 4500 bolt pattern
The bolt pattern (also called the bolt circle) is defined by the number of lug holes and the diameter of the circle on which they lie. For the Ram 4500, the typical arrangement is eight lug holes evenly spaced around a circle that measures 165.1 mm in diameter (about 6.5 inches). This specification covers most standard Ram heavy-duty models from several generations, though there can be exceptions for certain export markets or specialized configurations. Always verify on your specific vehicle using the data plate or the factory documentation.
Does it apply to front and rear axles?
Yes. The Ram 4500’s front and rear axles (including dual-rear-wheel setups) generally share the same eight-lug bolt pattern. When evaluating wheels, the pattern is the primary compatibility factor, provided other dimensions such as center bore and offset are also compatible or properly accommodated.
How to verify and shop for wheels
Before purchasing wheels, confirm the exact bolt pattern on your vehicle and match it to the wheel specifications. Check not only the bolt pattern but also center bore size, offset, load rating, and hub compatibility. If in doubt, consult your vehicle’s VIN-derived specification sheet or the wheel manufacturer’s fitment data to ensure a correct match for your Ram 4500.
Summary
The Ram 4500 most often uses an 8x165.1 mm (8 on 6.5 inches) bolt pattern, shared across standard heavy-duty configurations including dual rear wheels. Always verify the pattern for your exact year and market, and consider center bore and offset alongside bolt count when selecting wheels.
