What tire pressure should I run on my Tiffin motorhome’s tires?
Great question—tire pressure on your Tiffin motorhome is critical not just for ride comfort, but for safety, braking, fuel economy, and tire life. The exact pressure depends on three key things:
✅ 1. Load-Based PSI is King
- The only accurate way to determine tire pressure is to:
- Weigh your motorhome on a certified scale (per axle, ideally per corner).
- Use the tire manufacturer’s load/inflation chart to match your actual weight to the recommended PSI.
- Example: For a Michelin 275/80R22.5 XZE, front axle at 12,000 lbs might call for ~105 PSI.
🧾 2. Use the Coach Sticker as a Baseline
- Located on the driver’s side wall or near the seat, this label provides Tiffin’s recommended cold inflation pressure based on GVWR (maximum load).
- Example: Many Tiffin Class A coaches show 110 PSI cold for front and rear tires (assuming full load).
🔧 3. Tire Pressure Monitoriing System (TPMS) Systems & Adjustments
- If you're using a TPMS, calibrate it based on your actual loaded weight PSI—not just the sticker.
- Check pressures when tires are cold, before driving.
- Adjust for elevation and temperature shifts during long trips.
⚠️ What NOT to Do:
- Don’t guess based on ride feel—under inflated tires can overheat and blow out.
- Don’t rely solely on Tiffin's door label if you've heavily customized or changed weight distribution (like added lithium batteries, solar, extra cargo, etc.).
- Never exceed the max PSI printed on the sidewall unless load charts require it.