ok, im not sure but had the wheels off today
(well dad did cos i have a broken leg, which makes things difficult to do

) and they say they are 15"x6.5JJ18
so am i right in assuming they are 18mm offset??
Also my rear (different style wheel) are stamped with "28" close to the wheels size (eg. 15x7JJ)
would u assume that is offfset of 28mm??
thanks in advance everyone