I always care a spare tube, and a little pack of pre-glued patches. Patches have a high rate of not working well, and you will probably leak slowly when patched. Tubes aren't that much $2-10, and you shouldn't get flats that much (if you do you gotta jack up the PSI). Tubes are just way easier, work better, and aren't that expensive.
I carry an extra tube and glueless patches. In my experience with glueless patches, they work very well, you don't have to let them dry and they seem to stretch out with the tube better than patches requiring glue. I've thrown away a tube after placing 8-9 patches over the life of the tube.
Why do I carry both? Replacing with a spare tube doesn't take nearly as long as patching a hole an then replacing that tube. You can repair your damaged tube when you get back home.
That being said, I now ride with slime in my tubes as well, cause where I ride, even on pavement we have a lot of goatheads (thorns) and its not if, but when you get a puncture.
I carry glued patches, because I have found that gluless patches flat suck. My LBS carries a great set of patches, and if applied properly, will hold as good as a new tube. I also carry a spare tube, in case of a major failure that patches wont fix!!
Since there's no tube, pinch flats are eliminated. UST tires are heavier and harder to puncture. Regular tires that are converted to tubeless use a sealant which will, in most cases, prevent puncture flats.
i'm running bontrager's tubeless system, with sealant. last annoying slow leak i got was due to the sealant gettign old, i pulled 27 thorns out of my tire. mind you i had zero flats. that would've been 27 flats
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).
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