I've ridden tires that look much worse for several hundred miles. This one GP4000 was booted and I had to fill in the massive cut (massive on the outside, not so much on the inside) with Krazy Glue about once a week for a solid 3 months before I could afford to replace it. That said, if you don't have to, don't ride it. Put a boot in it to keep the tube from popping out and use it as a trainer tire.