2019 Ram ProMaster Tire Size, Pressure, & Wheel Specs

The 2019 Ram ProMaster is a rugged, front-wheel-drive commercial workhorse based on the Fiat Ducato platform. Whether you are running a delivery fleet, outfitting a mobile workshop, or building out a camper van, outfitting your ProMaster with the correct load-rated tires and maintaining proper tire pressure is critical for safety and vehicle performance.

As an ASE-certified master technician, I’ve seen firsthand how overloading and under-inflating can destroy tires on these heavy-duty vans. Here is everything you need to know about the 2019 Ram ProMaster’s tire and wheel specs.

Quick Answer: 2019 Ram ProMaster Tire & Wheel Specs

• OEM Tire Size: LT225/75R16
• Recommended Cold Tire Pressure: 65 PSI Front / 72–80 PSI Rear (varies by payload/placard)
• Bolt Pattern: 5x130 mm (5x5.12 inches)
• Wheel Size & Offset: 16x6.0 inches, +66 mm offset
• Load Index / Speed Rating: 115/112 R (Must be Load Range E / 10-ply rated)
• Spare Tire Size: Full-size matching LT225/75R16 (underbody mount)
• TPMS Sensor Frequency: 433 MHz

Tire Sizes by Trim

Because the 2019 Ram ProMaster is built strictly for commercial hauling, all standard payload trims share the exact same heavy-duty wheel and tire setup. Note: This applies to the full-size ProMaster, not the smaller ProMaster City.

Recommended Replacement Tires

Commercial vans require commercial-grade tires. Standard SUV tires will not safely support the gross vehicle weight rating (GVWR) of a loaded ProMaster. Always choose a Load Range E (10-ply) tire. Here are top choices based on performance and budget:

1. Michelin Agilis CrossClimate (Premium) – The gold standard for commercial vans. Excellent all-weather traction, long tread life, and reinforced sidewalls to prevent curb damage.
2. Cooper Discoverer HT3 (Mid-Range) – A superb highway-terrain commercial tire that offers a quiet ride, even treadwear, and strong load-hauling stability.
3. Nexen Roadian CT8 HL (Budget) – A durable, cost-effective choice frequently used by delivery fleets. Good wet traction and decent longevity for the price point.

When to Inflate to Max Load PSI

The 2019 Ram ProMaster is a heavy-duty commercial van. The tire pressure door placard usually recommends 65 PSI for the front tires and 72 to 80 PSI for the rear tires.

Because the rear axle bears the brunt of the payload, rear tire pressure must be adjusted based on the load. If you are hauling close to your ProMaster’s maximum payload capacity (or if you have built a heavy camper conversion that permanently keeps the van near its GVWR), you should inflate the rear tires to the maximum cold pressure listed on the tire’s sidewall and the door placard (typically 80 PSI for an LT tire). If you are driving completely empty, you can slightly reduce rear tire pressure to improve ride quality and prevent center-tread wear, but always return it to max pressure before loading up.

Lug Nut Torque & Pattern

• Bolt Pattern: 5x130 mm
• Lug Nut / Bolt Torque: 145 ft-lbs (197 Nm)

Tech Note: The Ram ProMaster uses wheel bolts (lug bolts) rather than the standard lug nuts pressed onto hub studs. 145 ft-lbs is a significantly higher torque spec than most standard trucks and SUVs. Always use a calibrated torque wrench. Uneven or inadequate torque can lead to wheel wobble or sheared bolts.

Common Tire Issues for This Vehicle

1. Front-Wheel Drive Cupping & Wear: Because the ProMaster is front-wheel drive, the front tires handle steering, braking, and acceleration. This can lead to accelerated wear and cupping on the front tires if they are not rotated regularly. Rotate tires every 5,000 to 7,000 miles to maximize their life.
2. Curb Damage: Delivery drivers often parallel park or maneuver in tight urban environments, leading to severe sidewall abrasions. Inspect the inner and outer sidewalls for deep gouges that might expose the tire's ply cords.
3. Under-Inflation Blowouts: Running a fully loaded ProMaster with rear tires at 45–50 PSI (instead of the required 72–80 PSI) creates extreme heat due to sidewall flex, ultimately causing catastrophic tire blowouts at highway speeds. Always monitor your TPMS system!

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