e.g. a 285/75R17 → Width: 285 · Aspect: 75 · Rim: 17
02Vehicle Weight (lbs)
Light
Day run, no gear
Loaded
Camp gear, water
Heavy
Roof tent, trailer
03Terrain Type
🛣️
Pavement
Full PSI
🪨
Dirt / Gravel
Drop 10–15%
⛰️
Rock Crawl
Drop 30–45%
🏜️
Sand
Drop 40–55%
💧
Mud
Drop 35–50%
🌨️
Snow — Soft / Fresh
Drop 35–50%
🧊
Snow — Packed / Ice
Drop 15–25%
❄️
Snow — Deep / Powder
Drop 50–60%
🌊
Water Crossing
Drop 20–30%
🌊 Water Crossing Advisory: A snorkel raises your air intake but PSI still matters — aired-down tires improve grip on river beds and reduce the risk of being swept sideways. Never exceed your vehicle's wade depth. Check current flow before crossing. Recovery gear should be rigged and ready.
04Tire Type
🛞
All Terrain (A/T)
Standard baseline
🔩
Mud Terrain (M/T)
+2–3 PSI stiffer sidewall
🛣️
Highway (H/T)
Less air-down — thinner sidewall
❄️
Winter / Snow
+3–5 PSI cold compound
⚠️
Run-Flat
Do NOT air down
🔐
Beadlock
Can go lower safely
Tire type affects how far you can safely air down. M/T tires have stiffer sidewalls. Run-flats should never be aired down off-road.
05Max Rated PSI
Found on tire sidewall. Max load PSI — we'll never exceed this.
06Temperature Adjustment
°F — Fahrenheit
°C — Celsius
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—
—
Every 10°F rise = ~1 PSI increase inside the tire. Enter the temp when you last checked / set your PSI vs. now.
◉
Recommended PSI
PAVEMENT
Front Axle
--
PSI
Rear Axle
--
PSI
🌡 Temperature Effect
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⚠ Results capped at your tire's max rated PSI. Check your vehicle's door placard for minimum highway PSI.