pandapants wrote:You should be more worried about width than diameter if breaking the tires loose is a concern.
Actually, while this statement may seem to be perfectly true, the reality is a bit different.Wheel diameter (well, moreso WEIGHT) will be much more a factor than the width of the wheel. An 18" wheel will take more torque to break its tire loose than a 15" wheel. Think about it; there is much more rotating mass to spin on an 18" wheel. While a wider wheel does create a larger tire footprint, you can rock a 15"x10" wheel on a stock motored car as long as the rubber compound supports it. So to put it simply, tire compound will have more of an impact on "driftability" than simply the tread width of the tire. Soft compound=more grip, while hard compound=less grip, and therefor easier to spin and also longer lasting!
Personally, I am torn between my next set of wheels being 15" or 16". 15" would ultimately be more performance friendly as far as rotating mass, but it will also be a bit more difficult to find a sportier tire suited for grip/all out performance (am i right?) while you can find z rated tires of softer compounds for 16" wheels rather easily.