The specification that defines how the wheel is attached to the vehicle’s hub on a 2018 Ram 3500 truck is a crucial element for wheel compatibility. It refers to the arrangement of the lug studs or bolts on the hub, and is typically expressed as a number indicating the number of studs/bolts and another number representing the diameter of the circle formed by these studs/bolts. For example, a specification of “8×6.5” indicates an eight-lug configuration with a bolt circle diameter of 6.5 inches.
Understanding this specification is paramount for ensuring proper wheel fitment and safe vehicle operation. Using wheels with an incorrect specification can lead to wheel instability, damage to the hub and wheel, and potentially catastrophic failure. Historically, manufacturers have employed different specifications across different models and model years, necessitating careful verification before fitting aftermarket wheels or tires. The proper specification guarantees secure wheel mounting, which is essential for load-carrying capacity and overall driving safety.