can duallys go in car washes

[SophiaAnn]

Yes, most dually trucks can go through car washes, but it is not recommended for automatic touch-friction (brush) washes. The significantly wider rear axle and fender flares on a dually (a truck with four rear wheels instead of two) pose a high risk of damage. The safest and most recommended method is a touchless or brushless automatic car wash, or a self-service bay where you have full control.

The primary risk with a standard automatic car wash is the mechanical brushes or cloth strips. These are designed for the width of a standard passenger vehicle. A dually's rear track width can be over 10 inches wider, meaning the spinning brushes can aggressively strike and scrape the protruding rear wheels and fender flares. This can cause costly damage to custom wheels, paint, and even the fiberglass flares themselves.

Touchless car washes are a much safer alternative. They use high-pressure water and specialized detergents to clean without any physical contact. While they may not always remove caked-on mud or brake dust as effectively as a friction wash, they eliminate the risk of physical damage. Another excellent option is a self-service bay. This allows you to manually pressure wash the truck, including the hard-to-reach areas around the dual wheels, and then hand-dry it to prevent water spots.

If you must use a friction wash, preparation is key. Consult your owner’s manual for any specific guidance. Look for a wash that advertises a "wide vehicle" or "truck" bay. Before entering, carefully fold in your side mirrors and walk the truck through the wash bay to visually confirm there's ample clearance on both sides. Even then, you assume a significant risk.

Dually Car Wash Consideration	Key Data / Risk Factor	Recommended Action
Rear Track Width	Can be 80+ inches vs. ~65 inches for a standard truck.	Measure your truck's widest point (typically the rear fenders) before entering any wash.
Automatic Touch-Friction Wash	High risk of damage to fender flares, wheels, and paint.	Avoid. Brushes are not calibrated for dually width.
Touchless Automatic Wash	Low physical risk, but may be less effective on heavy grime.	Safest automated option. Ideal for routine cleaning.
Self-Service Bay	Zero risk of automated damage; requires your own effort.	Highly recommended. Allows for precise cleaning of wheels and chassis.
Conveyor Track/Guidance System	Incorrect tire placement can cause undercarriage scraping.	Ensure the guide rails are designed for truck wheelbases and align your tires carefully.

Ultimately, the extra investment of time in a self-service bay or the slightly higher cost of a touchless wash is minor compared to the expense of repairing damaged components on your dually.

[DiBriella]

I drive a dually for work, and I never, ever take it through a regular brush wash. It's just asking for trouble. Those flimsy fender flares are expensive to replace. I stick to the touchless automatic wash for a quick rinse or, even better, the self-service bay on a Saturday morning. It’s worth the extra twenty minutes to spray out all the grime from between the dualies myself and know nothing’s getting scratched up.

[CameronRose]

From a technical standpoint, the clearance is the main issue. The industry-standard equipment in most automatic tunnels is not built to accommodate the increased track width of a dual-rear-wheel truck. The rotating brushes operate on a set path, which will almost certainly make contact with the extended rear fenders and wheels. This contact is not a gentle wipe; it's an impact that can lead to cosmetic and structural damage. Therefore, the only viable automated solutions are touchless systems, which rely solely on chemical agents and high-pressure water jets.

[StChristopher]

It’s all about compromise. Sure, you can probably find a wide-bay car wash that might fit your truck, but why risk it? I see it as a choice between convenience and potential damage. A touchless wash is a great middle ground—it’s convenient and safe, even if it doesn’t get every single spot. For a truly deep clean, hand-washing is the only way to go. You learn to live with the extra effort because you love the truck.

[StElias]

Think of it like this: your dually is a tool, and a valuable one. You wouldn't use a rough, abrasive tool to clean a delicate surface. Similarly, using an aggressive brush wash on your truck is the wrong tool for the job. The design is fundamentally incompatible. I'm meticulous with mine. I use a two-bucket hand-wash method in my driveway. It lets me inspect the tires, brakes, and underside for any issues I’d never see in an automated tunnel. It’s not just about washing; it’s about maintenance.