I9's are just way too loud for me. You can't even carry on a conversation with someone on I9's when pedaling to the trailhead. And when riding a trail you always know where the I9 rider is. Way too loud.
I have CK on Derby's 40mm wheels for all-mountain setup. Gonna build a XC setup with Light bike hoops and DT Swiss 240 hubs now. The all-mountains setup climbs a bit slower than I want.
I've been running my true precision stealth hubs now for about a year and they kick ass. they are 100 trillion poe. Really smart mechanism in those, makes the rest look like tech from the dark ages, comparatively.
Rule #9 // If you are out riding in bad weather, it means you are a badass. Period.