7 or 8 inches sir? (Or madam) :-)

With all this talk of rim widths, it begs another question I have had on 
my mind recently....

I see Caterham are now selling the minator rim in 7" but with a black 
centre.

I'd like to increase the width of my rear tyres and I have only 6" rims at 
present. One potential problem I think I might have is that the wider rims 
seem to be a slightly different offset and cannot be used when you have 
the rear ARB in the upper mounting position, correct? Or is there a wider 
rim that can be used with this setup.  IIRC the wider rims have been used 
on superlight chassis, with the ARB in the lower position...

So what do I have to do to fit a 7 or 8 inch rim to the rear of my 
non-superlight chassis?

Vinnie

PS Snow melting over here so I *might* just get the Se7en and its new 
gearbox out shortly .-)))))))))))))
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