[99turbo]

[QUOTE=Jim Dorociak;9298612]Guys best way to measure and calculate ET. Measure from very outer edge of the rim lip to outer edge of opposing rim edge. Measuring this way adds usually about 1" to the real width of the wheel. Then place a flat edge across the very highest edge of the rear rim and measure down to the back pad of the wheel center. Take that measurement and compare it the the 1/2 measurement of the total width of the wheel.

So lets say rear wheel is 12" across. The 1/2 of that is 6" and how does that compare to the measurement down into the back wheel to the pad area. For sake of discussions - the pad height measurement is 6" ET would be 0. So measurement is 7.5" - 6" = 1.5" and that converts to 24 mm = 1" so 24 + 13 = ET 37.


Hi Jim,

Thank you for the helpful input. Where did you get the +13 in the equation (24 + 13 = ET 37.)

-99