Yep, they don't call them the Rocky mountains because they are all smooth and rockless! Even the easy trails will have sections of 'baby heads' that will challenge a dirt bike. Lowering the tire pressure to around 12-15 lbs was always the norm on my XR's so I'm wondering about doing the same with the 125. Weather is drying out a bit and I'll be headed to the trails in the next few weeks; am going to try dropping pressure a bit. With these little tires I won't drop too much, too easy to pinch a tube but will experiment with 20 +- and go from there.