K4 vs K2/K3....real world comparison

[BAKPAKR]

I could just not get past the metal tubular frame on my K3. I sold it and got a K4. I don’t k know that the K4 is “better”, but it doesn’t have the tubular frame.

 

[Kducot5]

Is everyone's K4s lumbar support pads stiff to start? Do they eventually break in? Got a K4 this spring and ended up running my K3 all fall because of how stiff/uncomfortable the foam in the K4 was when I took it on a few walks around the neighborhood

I have the K3 and K4. I felt like the K4 lumbar pad was very stiff compared to the K3. Steve with Exo says you need to load it up with 30-40 lbs and put 10 miles on it and the lumbar will break in. I only have a couple miles on mine with 30 lbs and it is still very stiff. Made me take the K3 on my last trip because of that.

 

[sr20detrps13]

I really want to get a K4 but the extra weight cuts for the K4x is just too appealing. Anyone know when it's supposed to be released?