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18-02-2014, 09:15 AM
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66 Mustang
Join Date: Jan 2009
Location: Townsville, QLD
Posts: 206
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My AU 2 XR8 (Auto - 3:45 LSD) has 235/45 17 tyres on it but the speedo is 4-5% slow ie. sit the speedo on 104-105, car is doing 100.
As most 75% of my driving is on the highway in 100 zones, it is quite frustrating. I was thinking I could use a speedo corrector, ie. like the jaycar one, or change the speedo gear to one for a 3:23 ratio auto. But... Running 235/50 or 245/45 tyres could fix the problem and give a slightly better ride. I had 235/50 tyres on the other AU ute and the speedo was spot on, I have 245/45 on the back of that one now and the car does 98-99 when reading 100 on speedo, which I'm cool with... What are your thoughts? |
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Changing tyre size on XR8 - 17 inch.
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