That doesn't look too bad, if there is alot of tread left you might want to just patch it while its off and put it back on next time. As stiff as those tires are, there is little chance a properly installed patch would give out there. My first Metz got a knarley jagged nail in the sidewall in the first 1000 miles, I plugged it and ran it till replacement time at 8000 miles with no trouble. If they were floppy tires that actually went flat-flat without air, I might have doubts about doing it. But this tire is so **** stiff that even without air it retains it's shape, reminds me of a runflat.