STI Crane Body vs RKI Crane Body: A Complete Buyer’s Comparison
If you’re building a crane truck for oilfield service, utility work, construction, or heavy mechanical work across Texas and Louisiana, two names come up again and again: STI (Service Trucks International) and RKI (Rawson-Koenig). Both brands are carried here at Star Truck Equipment in Wharton, TX — and both build excellent crane-ready bodies. But they’re built for different operators with different priorities. This guide breaks down exactly how they compare so you can make the right call for your fleet or your next build.
Who Makes STI and RKI?
STI (Service Trucks International) is headquartered in Waco, TX — a purpose-built manufacturer focused exclusively on heavy-duty service truck bodies. Their product lineup spans crane bodies, mechanics trucks, lube trucks, fuel service bodies, and complete upfitted truck packages. STI builds for the demanding world of oilfield service, pipeline maintenance, and heavy construction where downtime costs real money.
RKI (Rawson-Koenig) is manufactured in Houston, TX — one of the few truck body makers building right in the heart of the Gulf Coast energy corridor. RKI is known for service bodies and crane bodies built to handle oilfield and utility work in Texas’s harshest environments. Their proximity to the Houston petrochemical and energy markets has shaped a product that punches above its price point for heavy-duty buyers.
STI vs RKI Crane Body: Side-by-Side Comparison
| Category | STI Crane Body | RKI Crane Body |
|---|---|---|
| Made In | Waco, TX | Houston, TX |
| Primary Market | Oilfield, pipeline, heavy construction, national fleets | Oilfield, utility, Gulf Coast energy sector, regional contractors |
| Chassis Fit | F-450 / F-550 / Ram 4500 / Ram 5500 chassis cabs | F-450 / F-550 / Ram 4500 / Ram 5500 chassis cabs |
| Crane Integration | Factory-engineered crane mounting, pairs with Tiger Cranes + major brands | Crane-ready subframe, works with Tiger Cranes + major brands |
| Body Construction | Heavy-gauge steel, fully integrated compartments | High-strength steel, powder-coat finish, modular compartment options |
| Mechanics Truck Option | Yes — dedicated mechanics body with air compressor mounts, welder brackets | Yes — service/crane hybrid configurations available |
| Lube/Fuel Service | Yes — STI builds complete lube trucks and fuel service body packages | Lube/fuel packages available on select configurations |
| Price Range (Installed) | $18,000–$40,000+ depending on configuration and crane package | $14,000–$30,000+ depending on configuration |
| Finish | Powder-coat (standard); specialty coatings available | Powder-coat (standard) |
| Availability at STE | ✅ Stocked and ordered | ✅ Stocked and ordered |
Where STI Crane Bodies Win
STI is the go-to when you need a fully integrated, purpose-engineered heavy service truck — not just a crane body sitting on a generic platform. Here’s where STI pulls ahead:
1. Complete Mechanics Truck Packages
STI’s mechanics truck bodies are among the most complete in the industry. They’re engineered around real oilfield and pipeline service workflows — with structured air compressor mounts, dedicated welder compartments, organized tool storage, and crane mounting provisions that work as a unified system. For a full mechanics truck build, STI has the most complete factory solution available.
2. Lube and Fuel Service Bodies
If you’re running a lube truck or fuel service truck — common in oilfield and pipeline work — STI is one of the few manufacturers that engineers these as integrated body solutions. The tank mounts, plumbing provisions, and crane interfaces are designed together rather than bolted on as afterthoughts. STI’s lube truck and fuel service body lineup has no real equivalent at RKI’s typical configuration depth.
3. Heavy National Fleet Experience
STI builds for large fleet buyers — pipeline companies, energy sector contractors, and construction firms operating across multiple states. Their engineering documentation, parts support, and fleet pricing structures reflect that scale. If you’re buying 10+ units or need consistent fleet spec across multiple job sites, STI’s infrastructure supports that better than most competitors.
Where RKI Crane Bodies Win
RKI holds its own in several areas — and for many Texas and Louisiana buyers, it’s the smarter choice:
1. Price Point for Comparable Crane-Ready Builds
RKI consistently delivers crane-ready service bodies at a lower installed price than comparable STI configurations. For single-truck buyers, small fleets, or contractors who need crane capability without the full mechanics-truck package, RKI gives you a solid platform at a more accessible entry point. You’re not sacrificing quality — you’re getting right-sized specs for the job.
2. Houston-Built Durability for Gulf Coast Conditions
RKI’s manufacturing roots in Houston mean the product was born in a coastal, high-humidity, saltwater-adjacent environment. The powder-coat finishes and steel construction specifications reflect real Gulf Coast service conditions — an important consideration for Louisiana buyers and coastal Texas operators dealing with marine air, refinery environments, and year-round humidity. These trucks live outside in some of the toughest weather in the country.
3. Aluminum Service Body Options
RKI offers aluminum service body configurations on select models — a meaningful advantage for operators who need to preserve payload capacity on F-450 and F-550 platforms while running a crane. Aluminum service bodies can save 300–500 lbs versus comparable steel, which translates directly into usable crane capacity and payload margin. STI’s lineup skews heavier-gauge steel, which makes sense for their typical oilfield applications but isn’t always the right spec for every buyer.
Crane Pairing: Tiger Cranes Work With Both
At Star Truck Equipment, we pair crane bodies with Tiger Cranes for complete truck-mounted crane builds. Tiger Cranes — available in 3, 5, 7, and 10 ton-meter configurations — mount cleanly to both STI and RKI crane-ready subframes. Whether you choose STI or RKI for the body, the crane installation process is similar and the end result is a capable, work-ready crane truck built and upfitted right here in Wharton, TX.
Typical complete builds:
- Light crane service truck: RKI crane-ready service body + Tiger 3-ton-meter crane on Ford F-450 or Ram 4500
- Heavy oilfield crane truck: STI crane body + Tiger 7–10 ton-meter crane on Ford F-550 or Ram 5500
- Full mechanics crane truck: STI mechanics body + Tiger 5-ton-meter crane + air compressor on F-550 chassis
Which Should You Choose?
Here’s the straightforward decision guide:
Choose STI If:
- You need a complete mechanics truck package with air compressor, welder, and crane mounts as a unified system
- You’re building a lube truck or fuel service body with integrated tank and plumbing provisions
- You’re operating in heavy oilfield, pipeline, or large-scale construction environments where durability over everything matters
- You need fleet-scale purchasing with consistent specs across multiple units
- Your chassis is an F-550 or Ram 5500 and you want maximum crane capacity
Choose RKI If:
- You need a crane-ready service body at a lower entry price without sacrificing real-world durability
- You want aluminum service body options to preserve payload capacity on your chassis
- You’re in coastal Texas or Louisiana and want a body built with Gulf Coast conditions in mind
- You’re a smaller contractor or single-truck buyer who needs crane capability but not the full mechanics-truck package
- You want a Houston-built body from a manufacturer with deep roots in the Gulf Coast energy sector
See Both at Star Truck Equipment — Wharton, TX
At Star Truck Equipment, we carry both STI and RKI and we’re happy to walk you through the right fit for your truck, your job, and your budget. We serve contractors, oilfield operators, utility companies, and trades workers across Texas and Louisiana — from Houston and Corpus Christi to Baton Rouge and Lake Charles. Our team will help you spec the right crane body, pick the right crane, and get your truck built and working fast.
Ready to start your build? Call us at (979) 532-1486 or browse our crane bodies online. You can also explore our service bodies, STI product page, and RKI product page to get a sense of what each brand offers before you call.
Star Truck Equipment — 2507 County Rd 231, Wharton, TX 77488 — (979) 532-1486
