Originally Posted by Monti

One thing from the IIC is that the bite was really high and a lot of the A main mod guys went to green rears. Green rears allow the car to turn more due to side wall flex. This is really the main difference between the green and blue rears and it is how they should be used to tune. Slower classes like 17.5 should almost always be on green to allow on power rotation. In mod blue works better because they are more comfortable to drive and don't over rotate the car in the corner.
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Monti