Originally Posted by jchammond

The rear Nismo 26.9” drive wheel diameter is dead on with gps...my rear 345/30’s were a tad over 27 & made speedometer slow (maybe 1mph@70), but as tires broke in & wore a little; speedo was dead on.
Mine came with base wheels & diameter was 26.7” on drive wheels (where the toner rings read the sensors), and the speedometer was close when tires were new,but gradually got fast as they began to wear.