c32AMGOD

During the recent install of my evosport kit, I measured the evo crankpulley out of curiosity and noticed that it was 172mm instead of the 178mm that is advertised. The measurement did not include the belt thickness and I performed the measurement several times to make sure that I was measuring right through the center of the pulley.

Is this normal for the evosport crank pulleys? or is this a manufacturing issue?
What does everyone elses evo pulley measure?

Any insight into this would be greatly appreciated