Haven't had much experience with tubless but after reading the previous posts I'll be looking into it further. Until then, I'll stay with my slime. I rode in So Cal for many years with nothing more that a spare tube and a small pump which I rarely ever needed. Since moving to the Boise area I've never seen more goat heads anywhere. Depending where you ride, slime is a must. Unfortunately, the heavier tires are noticeable in handling and accelleration (both suffer).