kfull

So sometime this winter I'll be getting a new set of tires for next summer and I want to go a little bit wider at least on the rear tires. Probably either 285 or maybe 295. Is there any kind of rule of thumb that says I should go wider on the front also? or can I keep it at the oem 245? Also, should I keep the sidewall the same? Any other things I should be aware of when going wider than oem?

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2012 GM 6MT sports package | FI non res cf exhaust | K&N Drop Ins | Viper 3303 security system w/ tilt sensor | GTR start button | 35% rear 45% side window tint | Michelin PSS