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...

I've got a 2012 T5 (T32) with 235/50/R18 tyres on. Are these ok for my van, or do I need to change them? Someone suggested profile increase to 55. Any advice given is appreciated.