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Old February 4th, 2010, 05:27 PM   #19
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Join Date: Dec 2003
Location: Auburn, CA
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no, the rolling diameter is about the same for the two tire sizes, but the 225 is 20mm wider....bigger foot print gives you a better turn in, and less push (understeer). With the rolling diameter being nearly equal, the larger size will not upset the computer for the ABS or traction control. If the tire diameters are too far off % wise front to rear it will cause the computer to believe there is a braking discrepancy or traction problem. The sensors are in the hubs of each corner of the suspension.
The wider tire patch helps eliminate the heavy understeer the factory built into the suspension. This gives you a better balanced handling.
GGR AX and TT instructor for 20+ yrs.
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