So when I rolled my bike out of the shop after storage this winter I noticed right away the tires were soft the bike is a 2016 fxdls still with stock rubber. When I checked the pressure was maybe 15psi in each wheel I was pretty surprised how much air had leaked out. Is this normal over storage? I never really check the pressure as much as I should throughout riding season maybe I’ll keep an eye on it now. I’ve filled that back to the recommended 30 front 40 rear. Does anyone purposely release pressure during storage is that thing.

 

Rolled mine out today and they were about 8 to 10 psi low.
I don't think that's anything to fret about.

 

Air molecules do find a way out of a tire over time, normal to lose pressure.

 

I usually don’t lose any air after winter storage. I would check your pressures every time you need gas.

 

My 2018 FLHCS lost about 3-4 pounds in each tire over the winter. These are spoked wheels with tubes, though.

 

My front tire won’t lose any air but my rear I have fill several times a year. I even had a new tube put in but it did not make any difference

 

If you remember the combined gas law from chemistry, one of the laws derived from it is that temperature is directly proportional to pressure. So, as the temperature decreases, the pressure decreases.

With tires, the rule is that for every 10° change in temperature, the pressure will change 1 psi. So, if the ambient air temperature goes down 10°, you will lose 1 psi of tire pressure.

I will go out on a limb and assume it can get pretty cold in Kamloops, BC. Given that, it would be normal for you to lose a reasonable amount of air in your tires during the winter.

 

First thing to check after any period of time, tire pressure. Guaranteed to lose tire pressure over winter storage.
Ride safe!

 

Tires are porous. They WILL lose air. Some more than others. And someone already mentioned how temp changes will also change your air pressure.

But...., do NOT check your tires every time you gas up. Check your tires BEFORE you ride off, while they are still cold.

Spring is almost here and that means when I am getting ready to ride my bike has been sitting in the garage, not out in the sun, probably still early in the day and the previous night was cool so when I check my tires if the pressure isn't down any more than 1 or 2 lbs. I won't add air cause I know the outside air is still warming for the day. Any more than 2 lbs. low and I will add air.

 

My bikes have spent the winter in my heated garage, all the tires have lost a bit of air I'm sure. The bikes have different brands of tires. Even my trailer tires, and wheelbarrow tires get soft out there. Just the nature of rubber tires. Tire pressure is the 1st item on my spring check list. I can't wait.