About Us

Summit Holdings is a privately-held company that does business as Summit Truck Group, Summit Bus, and Summit Idealease.

The company operates 26 commercial truck and bus dealerships in Arkansas, Kansas, Mississippi, Missouri, Oklahoma, Tennessee, and Texas. Summit Truck Group represents and services International®, Volvo, Mack, Ford, and Isuzu commercial trucks, and Crane Carrier specialty vehicles. Summit Bus represents and services IC Bus™, ElDorado National-Salina, and other commercial bus brands. Commercial truck lease and rental, mobile and dedicated maintenance services are offered through 18 Idealease™ locations. Summit serves customers with more than 1,000 employees, 300 technicians, over 350 service bays, and over $27 million in all-makes stocked parts.  

Our Vision

Continuous improvement in employee satisfaction, customer experience, and financial results.

Our Mission

Create a safe environment where our employees can prosper professionally and personally, while maximizing our customers' productivity.

Two Companies Come Together

On January 1, 2014, the newly merged Diamond Companies and Roberts Truck Center dealerships announced the name of their new organization. The new company will be called Summit Holdings and will do business as Summit Truck Group, Summit Bus, and Summit Idealease.

Partners Dick Sweebe and Blair Roberts say of Summit, “We are a company with a proud 72-year combined history of serving the commercial truck and bus industries. Our name embodies the strong reputation we have built in the markets we serve. Summit will continue to grow and deliver a higher standard of value to our customers because of our dedicated and talented employees and our commitment to integrity, service and quality in all that we do.”

Summit Holdings offers comprehensive transportation solutions that include new and used trucks and buses, parts and service, leasing and rental, financing and more.

Summit Truck Group


Summit Truck Group is the largest International® Truck dealer in North America and also represents and services Volvo, Mack, Isuzu commercial trucks, and Crane Carrier specialty vehicles at select locations. With a 72-year combined history, our team of sales professionals assures that you have the right specifications for your application. Our OEM trained and ASE-certified service technicians take pride in delivering efficient and professional customer service. We assure that the vehicles we sell and support perform with the reliability and uptime that our customers expect by repairing and maintaining vehicles on time, the first time.

Summit Bus

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Summit Bus is full service bus distributor specializing in: new and used bus sales, bus body repair, parts, service and repair for all makes and models. We offer IC Bus™ school and commercial buses, Collins Buses, StarTrans, Braun, and Mobility Works. We offer a full line of school buses, tour buses, passenger buses, childcare buses and vans, and paratransit buses and vans. We are a full service bus dealer for public and private schools, tour companies, bus companies, charter companies, churches, childcare centers, transit agencies, healthcare and retirement centers, hotels and shuttle operators. We are the premier bus dealership in the Oklahoma City, OK, and Little Rock, AR areas. Our experienced sales professionals are here to help you with all your School and Commercial Bus Transportation needs.

Summit Idealease

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Summit Idealease simplifies truck transportation with high-quality commercial vehicles for lease and rental along with dedicated maintenance options, flexible terms, schedules, and agreements that meet your business requirements.  Our locations employ experts in every area of commercial truck rental services and leasing.  We professionally guide our customers from the beginning - designing the right truck for the job, to the end of the vehicle's life - vehicle disposal and replacement.  Because Summit Idealease is able to harness a variety of professional resources, our customers see a difference in their service level and bottom line. 

The Summit Way

With 26 locations in 7 states, Summit Holdings offers comprehensive transportation solutions that include new and used trucks and buses, parts and service, leasing and rental, financing, and more.

Find out first-hand what makes Summit Truck Group tick...it's culture!

Experience Our REACH

Our REACH values serve as a compass for how we interact with our fellow employees and customers. 

How we interact with our customers

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Resolve Needs  

Exceed Expectations  

Act Now  



How we interact with fellow employees

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Reward Results