About Tri-State Diesel Repair
At Tri-State Diesel Repair, we’re more than just a truck repair shop—we’re the trusted partner for drivers, fleet owners, and businesses across Belmont, NH, and beyond. Founded in 2017 by Seth Bubar, a seasoned diesel mechanic with over two decades of hands-on experience and a military background, our mission is simple: to deliver honest, high-quality truck repair services that get you back on the road—fast.
From full-service diesel repair to 24/7 mobile truck repair, we offer solutions built around your schedule and needs. Our two fully equipped mobile units serve customers in emergency situations with fast and professional roadside truck repair in Belmont and surrounding areas. Whether you're managing a fleet or driving long-haul, downtime costs money—and that’s why we move quickly to diagnose and resolve your issues, wherever you are.
Built by Mechanics, Driven by Trust
Tri-State Diesel Repair was built from the ground up by working technicians who understand the grind, the stress, and the pressure of keeping diesel trucks on the road. We’ve been in your boots. That’s why every service we provide whether it’s a roadside axle fix or a major engine over haul is grounded in craftsmanship and trust. Our shop is more than a garage it’s a commitment to doing right by every driver who rolls in.
What Makes Us Different?
We combine military discipline, real-world diesel experience, and a community-first approach. While others may treat repairs as transactions, we treat them as opportunities to earn your trust for the long haul. Our team shows up when others won’t—offering dependable mobile diesel mechanic NH services and full diagnostics right where you need us.
Services We Offer
Comprehensive Services, Tailored to You
No two trucks or fleets are alike. That’s why we offer personalized fleet maintenance plans, targeted repairs, and emergency response services designed around your operation. From one-off diesel truck repair near me needs to long-term maintenance contracts, we tailor every solution for maximum uptime and minimum disruption.
Tri-State Diesel Repair is a veteran-owned truck and trailer repair company based in Belmont, NH, offering expert mobile diesel repair, fleet maintenance, and roadside assistance across Lakes Region NH Trusted. Fast.
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