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54warrior · 05-08-2007, 06:56 AM

I see this being asked alot, so I thought I'd make a post that describes why changing to a larger size of tire also changes your speedometer and odometer readings. It also explains how to determine the "correction factor" which can be used to calculate how many miles you really did travel, or how fast you are really going.

I also showed the correct method for determining the circumference of a metric sized tire (ex. 245/75/17).

Maybe this could be made a sticky if you think it's helpful??

05-08-2007, 06:56 AM	#1 (permalink)
54warrior Registered User iTrader: (1) Join Date: Jan 2005 Location: Lancaster, PA Posts: 5,132 Thanks: 286 Thanked 488 Times in 218 Posts	Tire Size/Odometer/Speedo Correction... I see this being asked alot, so I thought I'd make a post that describes why changing to a larger size of tire also changes your speedometer and odometer readings. It also explains how to determine the "correction factor" which can be used to calculate how many miles you really did travel, or how fast you are really going. I also showed the correct method for determining the circumference of a metric sized tire (ex. 245/75/17). Maybe this could be made a sticky if you think it's helpful?? __________________ 2005 Nissan Titan CC SE 4x4 6" Stage 1 Procomp Lift, SAW Coilovers-Front, Bilstein 5125 Series Shocks-Rear, Total Chaos Shackles, Custom Skid Plates 35x12.50-17 Cooper Discoverer S/T's, 17x9" Xtreme Alloy 1079's, PRG Billet Drive Shaft Spacer, PRG Street Traction Bars, Hella 500 Series Driving Lights