Frequently Asked Questions About Kenworth W990 Frame Steps & Acc.

What material are these frame steps made from, and will they rust or corrode over time?

Most W990 frame steps are constructed from either polished stainless steel or heavy-duty aluminum. Stainless steel options offer superior corrosion resistance and maintain their shine with minimal maintenance, while aluminum steps are lightweight and naturally resist rust. Both materials are designed to withstand road salt, weather exposure, and daily wear. For maximum longevity, we recommend stainless steel steps for trucks operating in harsh winter conditions or coastal areas.

Will these frame steps fit my specific W990 model year, and are there different mounting configurations?

Frame steps are typically compatible with W990 models from 2018 to present, but mounting configurations can vary based on your truck's wheelbase and factory options. Standard cab trucks usually require different brackets than extended cab models. Before ordering, verify your truck's exact specifications including cab configuration, wheelbase length, and whether you have factory air ride suspension, as these factors affect mounting point locations.

How difficult is the installation process, and what tools will I need?

Installation typically takes 2-4 hours and requires basic hand tools including socket wrenches, drill with metal bits, and measuring tape. Most frame steps come with pre-drilled mounting brackets that align with existing frame holes, though some applications may require drilling 2-4 additional holes. Professional installation is recommended if you're uncomfortable drilling into your frame rails. Always use the provided grade 8 hardware and follow torque specifications to ensure safe, secure mounting.

What's the difference between standard and wide frame steps, and which should I choose?

Standard frame steps typically measure 4-5 inches wide and work well for most drivers, while wide steps measure 6-7 inches and provide extra foot space and stability. Wide steps are particularly beneficial for drivers wearing work boots or those who frequently enter and exit the cab in slippery conditions. Consider your typical footwear, physical mobility needs, and whether you'll be climbing in and out multiple times daily when making your selection.

Do these frame steps affect ground clearance, and are they DOT compliant?

Quality frame steps are designed to maintain adequate ground clearance and meet DOT regulations when properly installed. Most steps position 8-12 inches below the frame rail, preserving sufficient clearance for normal highway and job site operation. All steps sold for highway use should meet FMCSA requirements for commercial vehicle access systems. Check that any step you consider includes certification documentation and maintains the minimum 7-inch ground clearance required in most jurisdictions.