Ok got some questions on tires, I bought a new set of bontrager R2's when I bought my bike back in dec. I now have 1200 miles on them, and they have tons of large cuts and gashes. I am not dealing with any problems with flats, although I do have stop flats tire liners installed. Should I just wait until they blow to replace ? Are there any tires more resistant to cuts ? ( I know dont run over glass and other crap but stuff happens ). Is there any true to more $ on tires means better durability ?