I hope this doesn't get chewed up too bad in the mail...

  Here's the first installment, compiled from the info I had at home. Vanagon
  and EV owners, please send along the ratio and stroke info. if you can. We
  need Diesel data for both 4 and 5 speeds if the top gear ratio is different.
  Also, we need the stock tire size for the EV - the calculations thus far
  assumes 185R - 14 Reinforced

			  VW Bus Relative Wear Index
                           
                           
                           
    Year | Top Gear  |  Final Drive | Engine Revs | Stroke | Piston Travel  
         |  Ratio    |   Ratio      |   /Mile 	  |        |     /Mile
   ________________________________________________________________________
  
   68-71 |    0.82   |   5.375:1    |   3484      |  69mm  |   1577 ft.            
 72-73.5 |    0.82   |   5.375:1    |   3484      |  66mm  |   1509 ft.      
  73.5** |    0.89   |   5.375:1    |   3781      |  66mm  |   1637 ft.  
  74-75  |    0.89   |   4.857:1    |   3416      |  66mm  |   1479 ft. 
  76-79  |    0.82   |   4.857:1    |   3148      |  71mm  |   1467 ft.
  
  
  ** From chassis # 2x3 2068 548

  Dave Kautz