On-site repair, I-40 & I-75

Broke down? We come to you.

Mobile service trucks dispatched same-day for trailer repair at your yard, the highway, or wherever you broke down. We carry common parts. We bill less than your downtime costs.

Call (865) 525-1115 Request a quote

Pulling a broken trailer to the shop is often more expensive than the actual repair. Knox Trailers runs mobile service trucks along the I-40 and I-75 corridors out of Knoxville. We come to your yard, your jobsite, or the side of the road. We carry common parts (slack adjusters, brake chambers, air lines, lights, tires) and the diagnostic tools to figure out what's wrong fast. Most mobile calls are dispatched same-day.

Mobile service we run

Roadside trailer repair

Broken air line, blown tire, light failure, brake adjustment issue. We come to your location with parts and tools. Most roadside calls back on the road within 90 minutes of arrival.

Yard service for fleets

Recurring on-site service at your yard. Brake adjustments, air leaks, light replacements, lube service. Save the cost and time of shuttling trailers to and from the shop.

DOT inspection at your yard

Annual DOT inspections performed at your facility for fleets of 5+ trailers. We bring the inspector to you. Trailers stay productive — no day lost to shuttling.

Mobile reefer service

Reefer unit diagnosis and repair on site. Compressor work, electrical issues, refrigerant service. EPA-certified mobile refrigerant handling.

Tire and wheel service

Roadside tire change, wheel bearing service, hub replacement. We carry common tire sizes for emergency on-site replacement.

Emergency response

24/7 emergency line for our regular fleet customers. Stuck trailer, jackknifed, holding up loading dock — we respond.

Schedule the work or get a quote.

Mon–Fri 7am–6pm. Same-day appointments most weeks.

(865) 525-1115 Request a quote

What good looks like

When you bring a trailer to Knox Trailers, here's what you should expect.

Mobile truck dispatched within 60 minutes of your call
Truck arrives with the parts most likely to fix the issue
Diagnosis on site, repair on site, back on the road on site
Billed by the job, not the hour — no surprise mileage charges
Service records emailed before the truck leaves your location
Follow-up call within 24 hours to verify the fix held

Why fleets keep us on speed dial

Mobile service done right saves money even when our hourly rate is higher than a shop rate. Three hours of downtime for one trailer often costs more than the entire mobile repair. We've calculated this for enough fleets to know the math.

Our mobile trucks are equipped — not just a tech with a toolbox. Diagnostic computers for ABS and reefer units, air system testing tools, common brake and air parts, electrical components, basic tire repair. Most mobile calls get fixed on the first visit.

Common questions

How fast can you get to me?

Mobile trucks are typically dispatched within 60 minutes for fleet customers and 60–120 minutes for first-time callers. Travel time depends on distance and traffic.

What if the repair needs the shop?

We're honest about it. If the issue requires shop-level tools (frame work, major structural, paint), we'll tell you on the call so you can plan towing. We won't bill mobile time for a repair we can't complete on site.

Do you do mobile service after hours?

Yes, for our regular fleet customers on a 24/7 emergency line. After-hours rates apply. For non-customers, after-hours availability depends on what's open in the queue.

Ready to get it fixed?

Same-day appointments most weeks for fleet customers. Call or request a quote and we'll get you scheduled.