VIAIR 85P Portable Air Compressor

The manufacturer claims it fills a 225/60/18 tire from 30 to 40 PSI in about one minute — that is a 10-PSI top-off, not a flat-fill. For a full flat-to-35-PSI fill on a standard passenger-car tire, community reviews consistently describe a few minutes of inflation time. No canonical stopwatch test from flat to 35 PSI on a P215/65R17 has been found, so treat any specific number as an estimate.

Community evidence is split. One reviewer found the gauge equivalent to a separate dial gauge when read with the compressor off. Another noted readings 3–5 PSI high while the compressor was running. The pattern is consistent with analog gauge behavior: read it after turning the compressor off for the most accurate result. If precision matters, verify with a separate calibrated gauge.

The 85P is rated to 60 PSI maximum working pressure. Most passenger cars (25–44 PSI) are well within range, as are sport bike and motorcycle tires. Light trucks and SUVs that require 60–80 PSI target pressure will exceed the 85P's rated ceiling. The manufacturer states a maximum tire size of 31 inches. For higher-pressure truck tires, the VIAIR 88P (which connects via alligator clips and supports higher pressure) is the appropriate upgrade.

No UL or ETL listing has been confirmed for the 85P in North American certification databases as of June 2026. Searches of UL Product iQ and the ETL Intertek Listed Mark directory returned no confirmed database hit. The quality.md rubric for this product notes CE marking as the stated certification basis, but CE is a self-declared EU conformity mark — it is not independently tested by a third-party lab. No active CPSC recall is on record for the 85P.

Yes — the 85P connects to the cigarette-lighter (12V accessory) socket found in virtually every passenger car. The power cord is 10 feet long; with the approximately 3-foot air hose, total reach is about 13 feet. The unit draws up to approximately 15 amps, which is within the typical 15-amp fuse limit for a car's accessory socket. No AC adapter is included or available for this model.