Since we bought our Periscope 4 years ago we have had 3 cracked rims. First a Sun Rhyno Lite went bad on our cross country trip. Replaced it with a Velocity Cliffhanger,and that was replaced with their Chukker, which just cracked . Its a 40 hole, 26" with disk brakes. We are a 350lb team,and do a loaded tour every year, but no camping gear is carried.
The cracking is in the area of the braking surface,the tires are Schwalbe Marathons,and the pressure is 90psi. I suppose Velocity will replace it under warranty,but after 3 times I wonder if we should try something else.