so I know the top tire pressure for the bike is:
front 36 psi
rear 42 psi I think, close to that number.

I put my tire pressure to this pressure about a month ago and today I checked the pressure and it was:
front 32
rear 38

This month I did not ride it too much, probably every other 4 days

But does your tire pressure go down that fast? Also around what pressure should I refill the tires back up?

last month when I refilled it with air I used the automatic gauge on the gas station air filler to put the pressure to the top specs, when I check it I use a walmart $2 slime magnet air pressure gauge, could that be what causes the discrepancy? as of right now riding with the pressure like this is perfect and no problems so far

 

Both guages are inaccurate. Temperature can make a difference as well. Warmer temps raise the pressure.

 

when you say both gauges are inaccurate, do you mean they both are inaccurate of a proper gauge, or that they both will give different answers, and tire pressure was relatively the same, not that I exactly would know but the amount of riding done before the pressure was taken was the same

 

I wouldnt trust either guage. The gas station ones are beat up and run over every day, the $2 ones are...$2 ones. Spend a few bucks on a good one, its well worth it.

 

Your tire pressure can change a decent amount w/ temperature. I bought an accutire digital gauge for my bike for like $12, it's also good to have an old school gauge where the air pressure pushes the stick out just to verify the digital one every now and then.

 

Yuppers, $10 well spent, never go cheap on any tool, unless it's the only one available and you really need it.

Always check temp with the tires cold.

Unless you have a specific, knowledgeable reason, inflate to the max pressure posted
on the bike frame. Worst case scenerio following that advice...is a slightly stiff ride,
if you are a light rider.

If you are experiencing low tires, after less than a month or longer, try soaping the
tire and bead. It's cheap and should be the first try at fixing the problem.
Look for soap-bubbles, indicating a leak.

Just put a good squirt of dish-soap in 8oz of water. Use an old spray bottle and you're good to go.

If that doesn't work, change the valve-stem inserts. They can go bad and leak.

That should get you an answer/fix, if not be sure and check back and let us know.

Ern

 

sometimes the people mounting your tires dont change the stems, which may cause your leak air more than usual.

 

yeah probably just going to invest in a better gauge and then form there check the stem and tire by doing what madhattr said, digital or manual, any brands or things in particular I should look for?

 

Do you guys really run the max psi? (36f/42r)

 

Yes I do and haven't ever had any problems.