Sorry Peter but I didn't see your questions until late last night. Photobucket is still giving me problems. I gave up this morning and tried again on postimage.
Unfortunately I don't have any measuring tools except for my eye and a ruler. For the roadwheels, it looks like they are the same size at 8mm. The FtF front wheel looks larger at 13mm to Revell's 11.8-12mm.
I hope this helps you.
All the best,