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Join Date: May 2007
Location: United Kingdom
County: Bedfordshire
Posts: 3,953
Assuming the figures in the manual are for a 16" wheel and having established the angles above for the 1.25mm toe-in ( rear wheels again ), we can now work out the difference of toe-in in mm for a different sized wheel.
Wheel angle with 16" wheel : 0.1762°
Nominal 17" wheel diameter : 431.8mm
Tan 0.1762 * 431.8 = 1.3279
In order to compensate for the larger diameter wheel the toe-in in mm needs to increase from 1.25mm to 1.3279mm. That's a difference of just 0.0779mm where the allowable tolerance is 0.5mm.
If all my assumptions are correct, there really is no need to worry about wheel diameters when you're dealing with factory standard wheel sizes.
Just for the hell of it, the numbers again for a 19" wheel ( which is I think the largest anyone has claimed to have fitted ) :
Wheel angle with 16" wheel : 0.1762°
Nominal 19" wheel diameter : 482.6mm
Tan 0.1762 * 482.6 = 1.4841
A difference of 0.234mm. Still within the 0.5mm tolerance.