Your thoughts on this tire data...

[Stephan]

I pulled the same comparisions from two different sites and what I am wondering which one is most accurate when it comes to the Speedometer?

This really isn't that big of a deal because HP Tuners allows me to change tire size and my speddo will be accurate, but it's more out of curosity who has the more accurate calculator... Most of the other info is spot on besides RPM...

Sites:
1010 Tires
Tire Size Calculator - Tire & Wheel Plus Sizing



and

Tacoma World
Tire Size Calculator - Compare Tire Sizes

 

[Tylers88]

I went from a 265/70r17 to a 285/70r17 and my speedo chenged 3 mph at 60, was one fast but now it's 2 slow so I would say the 2nd

 

[jvoisel]

For speedometer I've always used a tape measure. Works every time!

I used to change tires weekly, my tuner hated it!