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990 Posts
Matt,
sorry for the late reply. I didn't see this msg. Most guys like to air way down, and the bigger you go size wise, the lower you can go PSI wise. but for stock rubi tires, which are only 32's mounted on 17" rims, there's not a ton of side wall. so I found that 20 or MAYBE 18 was good. last time out I ran 20 and really liked it. When I was running 16 or less, one time I pinched a side wall and ruined the tire. One thing to do is watch as the tire deflates. I find the shape stays pretty constant until about 20, which is when it has that fat, low air psi look. That's when I stop deflating. Beyond that and you're giving up valuable inches of clearance and risking the sidewall damage I mentioned.
Hope that helps.
Adam
sorry for the late reply. I didn't see this msg. Most guys like to air way down, and the bigger you go size wise, the lower you can go PSI wise. but for stock rubi tires, which are only 32's mounted on 17" rims, there's not a ton of side wall. so I found that 20 or MAYBE 18 was good. last time out I ran 20 and really liked it. When I was running 16 or less, one time I pinched a side wall and ruined the tire. One thing to do is watch as the tire deflates. I find the shape stays pretty constant until about 20, which is when it has that fat, low air psi look. That's when I stop deflating. Beyond that and you're giving up valuable inches of clearance and risking the sidewall damage I mentioned.
Hope that helps.
Adam