Originally Posted by
mtnbud
The front rim is a 36 hole Velocity Mountain Goat in the 25mm width and the rear rim is a 36 hole Sun Rhyno Lite in the 25mm width. When I first got the Schwalbes, I was running them at 40 psi and the ride on pavement was awful. The side wall on the tire says 80 psi max, so I tried that and the ride quality and speed was phenomenally better. I was told it was safe to run those tires at 80psi with the wider rim?
I found I don't have traction issues running them offroad at 40-30 psi, even on wet dirt.
There are two width measurements for rims, inner and outer. The inner is usually 5 or 6 mm narrower than the outer. 25 mm is sort of medium for an outer width, but it's on the wide side for an inner width.
The high pressure limit on the tire may be more than what the rim can take. This is tricky territory of course! But if you try say 60 psi maybe you will be happy with the middle road!
Here is another mention of the stress on the rim from high inflation:
overinflated tires ?
http://sun-ringle.com/wp-content/upl...files_rev_.pdf