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Airing Down with 20's

My new Trailboss came with 32 inch tires on 20 inch wheels, how low can I safely air down?
My door sticker states 35 psi cold and I run that TP. Although for beach use I would air down to 15 psi then fill back up to 35 psi cold for street use.
 
My door sticker states 35 psi cold and I run that TP. Although for beach use I would air down to 15 psi then fill back up to 35 psi cold for street use.
Thanks, I probably wouldn't go under 15 psi. I normally only air down for deep snow.
 
Thanks, I probably wouldn't go under 15 psi. I normally only air down for deep snow.
We don’t get deep snow here. But generally, I like run my tires slightly lower than 35 psi in the winter just in case we get a dusting. 😂
 
You can air them down just be advised that with that short sidewall you can get a pinch flat or unseat the bead pretty easy.
 
Unfortunately my TB came with the 20's also. I run them at 35 psi for street driving and as a general rule when it comes to airing down, I never allow the psi's go below the diameter of my wheel. Meaning that if I had a 17 inch wheel, I would air down to 17 psi.

So in my case now, I air down to 20 psi and call it a day.
 

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