tyre size? :shrug:

tyre size?

ok guys i'm soon to get some new tyres for the back of my 66 coupe, at the moment my wheels are 14 x 8" with 225/60 14R's on them. I spoke to the tyre guy so he could get a pair in for me and he mentioned they sounded a little narrow. Is he correct in thinking that this is too narrow? should i have 235 or 245's on them? I'm a little curious as to whether they will fit fine aswell.