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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Description

🛠️ Inflate Your Adventure — Power Meets Portability

COMPACT PORTABLE DESIGN - Ultra-compact compressor with deluxe dual-compartment carry bag for effortless storage and transport.
BUILT TO ENDURE ANY TERRAIN - IP54 dust and water resistance plus thermal overload protection for worry-free off-road adventures.
RAPID INFLATION PERFORMANCE - Inflates a 35" tire from 15 to 30 PSI in under 3 minutes—get back on the trail fast.
VERSATILE 5 IN 1 INFLATOR HOSE - Includes 25 ft hose with 100 PSI gauge and multiple adapters for all your tire types.
POWERFUL 12 V DIRECT DRIVE MOTOR - Gearless, maintenance-free motor built for rugged off-road reliability.

The VIAIR400P 40043 Portable Compressor Kit is a rugged 12V electric tire inflator designed for trucks, SUVs, and off-road vehicles with tires up to 35 inches. Featuring a powerful gearless motor delivering up to 150 PSI and a 2.3 CFM airflow, it inflates large tires quickly and reliably. Its 25-foot 5-in-1 hose with pressure gauge and multiple adapters ensures versatility, while the compact design and durable construction make it an essential tool for any off-road enthusiast seeking dependable, fast inflation on the go.

Specifications

Brand	VIAIR
Voltage	12 Volts
Recommended Uses For Product	Tire Inflation
Power Source	electric-powered
Noise Level	74 dB
Special Feature	Heavy Duty, Portable, Quick Inflation
Included Components	25ft Inside Braided 5-in-1 Inflator/Deflator Air Hose with Inline 100 PSI Gauge, 3pc Inflation Tips Kit, 400P Original Portable Compressor, Deluxe Dual Compartment Carry Bag, Presta Valve Adapter
Item Weight	10.4 Pounds
Maximum Power	414 Watts
Capacity	2.3 Cubic Feet
Color	Silver
Material	Aluminum
Product Dimensions	10.87"L x 5.83"W x 7.48"H
Style	Original Portable
AC Adapter Current	30 Amps
Air Flow Capacity	2.3 Cubic Feet Per Minute
Motor Horsepower	0.555 horsepower
Model Name	400P Portable Compressor
Hose Length	25 Feet
Maximum Operating Pressure	150 Pound per Square Inch
Manufacturer	Viair Corporation
UPC	818114004032
Global Trade Identification Number	00818114004032
Part Number	40043
Item Weight	10.4 pounds
Item model number	400P
Is Discontinued By Manufacturer	No
Size	12V
Item Package Quantity	1
Number Of Pieces	1
Certification	certified frustration-free
Special Features	Heavy Duty, Portable, Quick Inflation
Batteries Included?	No
Batteries Required?	No
Warranty Description	All VIAIR products come with a One Year Manufacturer Defect Warranty

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