mph with 28 inch tires

[GNTIM]

What is the mph conversion with 28 inch tall tires? Meaning, what is my real speed at 25, 35, 45, 55...ect compared to the speedo.

 

[Boost231]

cant help you to much but its off 4 mph at slow speeds on my car. so say your at 45 on the speedo your really doing 49. at 71mph im doing 78. how that helps some. i can get full #'s later if you want when i get board with the GPS

 

[GNTIM]

That would be great. Took the girl for a ride to 115 {or so the speedo said} after she talked about her uncles Viper so I need to prove we were going faster. She said it was way quicker. We were on a closed course:smile:

 

[bison]

They are 7.14% taller so multiply the indicated by 107.14%. Its always off by the % of the difference of the gearing + or -. 123.211mph

 

[Boost231]

not sure what 115 is on the speedo. probley 124+

 

[GNTIM]

123 or 124 sounds about right. With a loose n/l converter it felt like it was hitting the wall...so to speak. Thanks guys.

 

[V6POWER]

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