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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VIAIR 400P Portable Compressor

Product ID: 47947360

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Details

Brand
VIAIR
Voltage
12 Volts
Recommended uses for product
Tire Inflation
Power source
Corded
Noise level
74 Decibels

⚡12V power for on-the-go inflation

💨150 PSI max pressure for rapid tire fill

🛠️Heavy-duty clamps with 40A inline fuse

Description

🚗 Power up your ride with pro-grade inflation on demand!

PORTABLE POWERHOUSE - Compact 4.72 kg design with deluxe carry bag makes it easy to bring along on every trip.
SAFETY FIRST ALWAYS - Direct battery clamps with 40-amp inline fuse protect your vehicle’s electrical system during use.
RAPID INFLATE ZERO WAIT - Inflate a 35-inch tire from 0 to 30 PSI in under 5 minutes—stay road-ready without delay.
PRECISION PRESSURE CONTROL - 5-in-1 inflator/deflator hose and gauge lets you monitor and adjust tire pressure with professional accuracy.
BUILT TOUGH FOR EVERY ADVENTURE - Heavy-duty metal construction with anti-vibration tray ensures durability on rugged terrains.

The VIAIR 400P Portable Compressor is a robust 12V inflator delivering up to 150 PSI max pressure, capable of inflating large tires quickly and efficiently. Designed for off-road enthusiasts and professionals alike, it features heavy-duty battery clamps with built-in fuse protection, a 5-in-1 inflator/deflator gauge for precise pressure control, and comes with a deluxe carry bag and anti-vibration tray for durability and portability. Perfect for those who demand reliability and speed in tire inflation wherever the road takes them.

Specifications

Manufacturer	Viair
Part Number	40043
Product Dimensions	27.61 x 14.81 x 19 cm; 4.72 kg
Item model number	400P
Size	12V
Colour	Silver
Style	portable
Material	Metal
Power Source	Corded Electric
Voltage	12 Volts
Item Package Quantity	1
Number of Pieces	1
Sound level	74 Decibels
Hose Length	25 Feet
Special Features	Heavy Duty, Portable
Included Components	deluxe carry bag, anti-vibration tray, 5-in-1 inflator/deflator hose and gauge
Batteries included?	No
Batteries Required?	No
Item Weight	4.72 kg

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