Rowan611
New member
Rover+Runner said:Assuming you started with 265/65 R17 and are going to 265/70 R17's your speedometer should register 3.4% slower than stock.
Check my math here at the best tire size calculator I've ever seen on the interwebs:
Tire Size Calculator
Right, so I'll be traveling faster but my speedometer reads slower than I'm actually driving. According to that site you listed; when my speedo is at 60 I'm actually doing 62. I'm going to have to figure out the difference