use a razor blade with the point on the edge of your rim, like parallel with the tire sidewall and pointing towards the hub.
Pull the excess really tight and use a razor blade to cut it off. By pulling it tight, you will need very little pressure on the blade for it to cut, thus reducing the possibility of slicing a sidewall. The remaining rubber should then rebound towards the rim/tire seam enough to not be able to see it when done.metalMTB said:I ran ghetto tubeless at a race a month ago and i blew out the front and rear on the second run. I think the rim strips were the wrong size and that was probably the reason they blew out. I'm not sure though. I'm about to try ghetto tubeless but theres one thing I can't figure out. How do I cut all the excess tube from the outside after i do it. I tried with a razor but I was scared to puncture the tire and when I tried just ripping it off It wouldn't all come off. thanks