Thanks, any help is appreciated, we need all the data we can get
What I can do at the moment is convert real sizes into 1/32 sizes easily (via an excel spread sheet calculator), in a few weeks I'll have time to reverse engineer it so that entering 1/32 dimensions will output a real world size. Once that is done, we will be able to up-scale the 1/32 items on the models and relate them to the real ones , creating a database. The problem is I will being using the metric system and so will have to convert to old sizes also.
I think for now if we just measure the 1/32 models tyres/wheels as accurately and in as many dimensions as possible and post up here what model they belong to, in a little while I will be able to say what they would be in real sizes, that is if people would rather I work it out.