I'm getting ready to fly to OSH, and am trying to ensure minimal hassle
during the trip. My tires are worn down to the point of grooves only
on the sides, so I'm installing some new ones, along with new tubes.
These are the smaller diameter tires that have always been popular on
KRs due to their lower profile, and therefore drag.
I have this box full of new tubes of all different kinds, and my most
recent ones were Larin Heavy Duty tubes. But one of them has had a very
slow leak that would go from 50 psi to 25 every month or two, even with
Slime in the tube (and yes, I swapped out the Schrader valve a year
ago). So I got another thick Larin tube out and mounted after stuffing
it inside the tube with a wheel half underneath, noticed that the tube
was very reluctant to tank a round shape after being pressurized a small
amount, or even more.
So I tried something else....a "DELI Brand Butyl Inner Tube" (that's
what the package calls it) in the 4.1/3.5-5 size, thinking maybe this
one would be bit smaller and would dodge the wheel half "pinch"
possibility that haunts some folks. It's a good time to mention that it
really helps to have lots of talcum powder in the tube, on the
wheel/tire interface, and on the inner tube to help avoid the pinch, and
to allow the tube to fit properly inside the tire. And it turns out
that was a much better fit...smaller diameter that didn't crowd the
wheel, making wheel-half pinch leaks a thing of the past. See enclosed
photo for the visible difference in these two inner tubes.
I washed the KR today, loaded the flight plan to OSH on both GPS's, and
I'm ready to go!
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