No I did not measure the location of the axle but looking at side pictures of the 2015 QS6.0 you can see that the wheels on the rear deck trailer are closer to the rear of the trailer. Plus the dealer confirmed the more rear ward location of the axle. It doesn't really matter now because the QS6.0 I bought has the read deck but when I was shopping I had given thought to adding a rear deck and was concerned about tow ability. It is good to know that the additional gear hanging off the rear of the trailer does not negatively affect the handling.