Thank you for the prompt reply, I have a few months to mull it over, but you are also saying things that I have been contemplating...... I have breakdown insurance from home to the Poland/Ukraine border...... it's the bit after that where the problems occur. Ukraine is non-EU so there are no recovery/breakdown companies that cover the 1/3 or our journey either way, Ukraine is quite a big country, so having a proper spare does give a bit of peace of mind....... it's the front/back being different widths that concerns me. I guess that they are the same diameter, so no worry with "transmission wind up"..... a tyre of the width that a rear tyres is, is likely to cause trouble cornering/turning...... so do you think that having a front wheel would cover both options?