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rear end ratio

1139 Views 17 Replies 7 Participants Last post by  2ndAmend
What is the standard and optional rear end ratio for a 2016 Challenger Hellcat with an M6?
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On the speedo, starting in 2015 the readings come from data supied by the wheel speed sensors so the car can adjust to a gear change and no tune for speedo reading is needed like before.
Does it go off the rears or fronts? One wheel? Average? I have a reason for asking....
People say the fronts but I think it's an average because every now and then you will still get a hero run that's too quick to be real.
I ask because last year I did Land Speed Trials and my tickets pretty much exactly matched my speedo. This year I had same size but different brand tires on the rear and the speedo read about 1.5mph higher than the ticket.
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