Every vehicle. Every tyre. One source of truth.
AiR only sets a pressure it can justify. This library holds the curated vehicle placard windows, the global tyre catalogue, the ETRTO and ISO standard tables, and the derivation engine that fills the gaps when no published record exists - always labelled as derived, never presented as published.
Car brands
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Model families
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Tyre brands
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Product lines
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Vehicle lookup
Search the placard library.
Search any make or model held in the curated library. AiR resolves the cold target inside the published light-to-full window using occupancy and cargo, then shows the independent derivation for cross-checking.
Occupants: 2
Cargo: 40 kg
296 GTB / GTS
2022-Front axle target
33.5 PSI
2.31 bar
245/35 ZR20
Rear axle target
37.0 PSI
2.55 bar
305/35 ZR20
Engine reasoning
- - Static axle loads from a 1470 kg kerb weight at a 41/59 split, plus 2 occupant(s) at 75 kg and 40 kg cargo biased 80 percent to the rear.
- - Per-tyre load scaled against the load index capacity at the 36 PSI reference, using load proportional to pressure to the power 0.8, with a 10 percent reserve.
- - Staggered fitment: front and rear are solved independently against their own size markings.
- ! No load index in the supplied size marking, so tyre capacity is unknown. The engine falls back to a conservative fraction of the reference pressure and the result should be confirmed against the placard.
Reference values are indicative engineering data. The pressure placard on the vehicle and the tyre manufacturer's own fitment guidance always take precedence.
Tyre catalogue
Every brand behaves differently between checks.
A premium casing loses around 1 PSI a month. A budget casing can lose half again as much. AiR uses the fitment on the car to set the cadence and to decide whether a loss is normal diffusion or a genuine puncture signal.
Brand profile
Michelin
Long-wearing compounds. Pressure discipline shows up as even shoulder wear across the life of the tyre.
Michelin Pilot Sport 5: Performance road, rewards precise cold pressure. Typical loss around 1.0 PSI a month. This casing holds pressure well, so a repeat loss on one corner is a genuine puncture signal rather than normal diffusion.
Product lines
| Line | Season | Rims | Loss / month | Character |
|---|---|---|---|---|
| Pilot Sport 5 | summer | 17-21" | 1.0 PSI | Performance road, rewards precise cold pressure |
| Pilot Sport 4S | summer | 18-23" | 1.1 PSI | Fast road and occasional track |
| Pilot Sport Cup 2 | track | 18-21" | 1.4 PSI | Track-focused, cold-set pressures matter most |
| Pilot Sport EV (EV) | summer | 18-22" | 1.0 PSI | EV-specific casing and acoustic foam |
| Primacy 4+ | summer | 15-19" | 0.9 PSI | Comfort and wet braking for saloons |
| e.Primacy (EV) | summer | 15-19" | 0.8 PSI | Lowest rolling resistance, very sensitive to under-inflation |
| CrossClimate 2 | all-season | 15-20" | 0.9 PSI | Year-round with 3PMSF certification |
| Pilot Alpin 5 | winter | 17-21" | 1.1 PSI | Performance winter |
| Latitude / Pilot Sport 4 SUV | summer | 17-22" | 1.1 PSI | Heavy SUV sidewall support |
| Agilis 3 | commercial | 14-17" | 1.3 PSI | Van and light commercial, high working pressures |
Standards
ETRTO and ISO tables, decoded.
Every AiR target traces back to published standards: load index capacity, speed symbol limits, and the service markings that change how a casing must be inflated.
Sidewall decoder
- - ZR marking indicates a fitment rated above 240 km/h. The W or Y symbol carries the real limit.
- - Extra Load casing. Target pressures sit above the standard-load equivalent for the same axle load.
Method
How AiR decides a number.
Nothing in the platform guesses. Each target is resolved through a fixed order of precedence, and the source is shown to the driver every time.
1. Published placard
The manufacturer's own cold pressure window for the exact fitment, split into light and full load columns. If it exists, it wins.
2. Load resolution
Occupancy and cargo move the target inside the published window rather than outside it, so AiR never exceeds what the manufacturer sanctions.
3. Derivation
With no published record, the ETRTO load-versus-pressure relationship reconstructs the window from axle load, load index and reference pressure, and the result is labelled as derived.
Reference library compiled for concept demonstration. Load and speed tables follow published ETRTO and ISO conventions; vehicle values are indicative and must be confirmed against the vehicle placard.