how long will it take to pump 4 off 265/75/16 from 15psi to 60psi

My tires are 285/75R16 and it takes about 4 minutes to air up from 30 psi to 65 psi (each tire). So, about 16 minutes for all four. The run time is 20 minutes per hour, so no cool down is necessary with the 400P model.

Can it fill 5th wheel tires to 110 PSI ST235/85R16 (G)

The specifications on the manufactures website says the max working pressure of the 400P is 150 psi. Please note the 400P has an 8ft power cord and 25ft air hose. Depending were you will receive power from, you might want to consider also purchasing the 30ft extension hose. Viair part number 00030.

I have 33x12.5.15 inch General Grabber offroad tires, will this compressor work well?

I also have 33x12.5 off road tires that I air down on the trail and use this compressor to air them back up. It works well and it is quick.

The 400p says both 2.3cfm and 2.54cfm while the 300p says both 2.3cfm and 2.4cfm. what is the advantage of the 400p over the 300p, if any?

400P Specifications - 12-Volt / 24-Volt- Permanent Magnetic Motor- Duty Cycle: 33% @ 100 PSI- Max. Working Pressure: 150 PSI- Max. 12V Amp Draw: 30 Amps300 P Specifications 12-Volt- Permanent Magnetic Motor- Duty Cycle: 33% @ 100 PSI- Max. Working Pressure: 150 PSI- Max. Amp Draw: 30 AmpsBasically 400P fills faster than 300P.

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400P/40043 12V Portable Air Compressor, 150 PSI for Truck & SUV Tires

Product ID: 82652268

Details

Brand
VIAIR
Noise Level
74 Decibels
Power Source
Recommended Uses For Product
Tire Inflation
Voltage
12 Volts

⚡12V heavy-duty power

💨2.3 CFM airflow capacity

⏱️2:45 min inflation time

1945.50 DT

Duties & taxes included

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Description

🚙 Inflate Your Adventure—Anywhere, Anytime!

ALL IN ONE VERSATILITY - Includes 25 ft 5-in-1 hose, Presta valve adapter, and multiple inflation tips—ready for trucks, bikes, and everything in between.
COMPACT READY TO ROLL - Ultra-portable design with deluxe dual-compartment carry bag—store it anywhere, take it everywhere.
POWER THROUGH ANY TERRAIN - 12V direct drive gearless motor delivers 150 PSI max pressure for up to 35" tires—built for off-road dominance.
BUILT TO LAST BACKED BY TRUST - IP54 dust & water resistance plus 1-year warranty from a 25+ year American brand—reliability you can count on.
RAPID INFLATION ZERO DOWNTIME - Inflates a 35" tire from 15 to 30 PSI in under 3 minutes—get back on the trail faster than ever.

The VIAIR 400P Portable Compressor Kit is a rugged 12V electric air compressor designed for off-road enthusiasts. It delivers up to 150 PSI with a powerful gearless motor, inflates large tires up to 35 inches in under 3 minutes, and comes with a 25-foot multi-function hose and versatile adapters. Compact, durable, and IP54 rated, it’s the ultimate tire inflator for trucks, SUVs, bikes, and more, backed by over 25 years of American engineering excellence.

Specifications

ASIN	B000X9AXR8
Additional Features	Heavy Duty, Portable, Quick Inflation
Air Flow Capacity	2.3 Cubic Feet Per Minute
Best Sellers Rank	#156,074 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #135 in Portable Air Compressors
Brand Name	VIAIR
Capacity	2.3 cubic feet
Color	Silver
Customer Reviews	4.7 4.7 out of 5 stars (1,658)
Global Trade Identification Number	00818114004032
Hose Length	25 Feet
Included Components	Tool Kit
Item Dimensions L x W x H	10.87"L x 5.83"W x 7.48"H
Item Type Name	Portable Air Compressor
Item Weight	10.4 Pounds
Manufacturer	Viair Corporation
Manufacturer Part Number	40043
Manufacturer Warranty Description	All VIAIR products come with a One Year Manufacturer Defect Warranty
Material Type	Aluminum
Maximum Current	30 Amps
Maximum Power	414 Watts
Maximum Pressure	150 Pound per Square Inch
Model Name	400P Portable Compressor
Model Number	400P
Noise	74 Decibels
Part Interchange Info	40043
Power Source	electric-powered
Recommended Uses For Product	Tire Inflation
Style	Original Portable
UPC	818114004032
Unit Count	1.0 Count
Voltage	12 Volts

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