4 gallon air tank enough?

[sled_dog]

My buddy and I stole one of my dad's old compressors yesterday for the motor. And I decided I'm gonna rip the 2 tanks down to 1 and use it in the K5. Its a 4 gallon tank and I would use a small pump for airride suspsensions to fill it. Think this would be alright just for airing down and up tires?

 

[denver75k5]

That should be plenty, I run a 3 gal. and it airs up 40's fast and runs air tools.