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re-Calculating Tire Sizes

HENRY ROBERTELLI queries:

does anyone know the diameters of the following tire sizes???

235/40/17
235/45/17
245/40/17
255/40/17
- ----------------------------------------------------
Henry,
I'll give it a shot.

235/40/17 = 619.80mm
235/45/17 = 643.30mm
245/40/17 = 627.80mm
255/40/17 = 635.80mm

Example: 235mm X 40% = 94.00mm X 2 (for top and bottom) = 188.00mm. 
Then you need to calculate the wheel (17 X 25.4mm = 431.80mm). Then take:

    188.00mm
  + 431.80mm
- -------------
    619.80mm

Here are the wheel figures in mm:

14" = 355.60mm
15" = 381.00mm
16" = 406.40mm
17" = 431.80mm
18" = 457.20mm
19" = 482.60mm

I hop this helps
George Boudreau (with calculator in one hand and Grolsch in other)
95 325is
83 323i
	      

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