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P-hack · 03-17-2014, 06:09 PM

the speedo/odo read wheel rpm. If you make the tires larger, the car will go faster for a given wheel rpm, but the speedo won't know about it so it reads less than actual. They are calibrated for a certain tire size.

03-17-2014, 06:09 PM	#61 (permalink)
P-hack Master EcoModder Join Date: Oct 2012 Location: USA Posts: 1,408 awesomer - '04 Toyota prius Thanks: 102 Thanked 252 Times in 204 Posts	the speedo/odo read wheel rpm. If you make the tires larger, the car will go faster for a given wheel rpm, but the speedo won't know about it so it reads less than actual. They are calibrated for a certain tire size.