A rolling circumference issue ..
My Jan 2010 T32 140ps LWB (panel van converted to Kombi, insulated, lined)
The label on driver pillar shows two 16 inch tyre sizes:
205/65/16 circ = 2114
215/65/16 circ = 2155
These have a circumference difference of about 2% (give or take all the maths...