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You won't have any problem, I ran the stock 245/45/17 in front and toward the end of the season I put a set of drag radial that where 305/35/18 with no speed sensor issues.
The Z06 uses 265/40/17 for front tires on a 17x9.5 front rim, I'm presently using a 18x9.5 front rim with a 275/35/18 front tire, fits perfectly with no problem.
The Z06 uses 265/40/17 for front tires on a 17x9.5 front rim, I'm presently using a 18x9.5 front rim with a 275/35/18 front tire, fits perfectly with no problem.