225/75R15 = 700x15 equivalent.
235/85R16 may be the conversion for a 7.50 16 but the difference between tyre companys is huge as Ive just found putting 235/85R16 Hankooks on the front and Maxxis on the back of my Cruiser,The hankooks are far wider and taller than The maxxis.
Handy wee bit of info;
Size Conversion
"Old" tyre dimensions are in inches, e.g. 7.50 x 16. The tyre carcass width and height are both 7.5", so there is no need to specifiy an aspect ratio (it is 1.0), and the overall tyre diameter is 2 x 7.5 + 16 = 31", in this case. The most common Jeep / Land Rover / Cruiser tyres were from 6.00 x 16 to 7.50 x 16, although some went up to 9.00 x 16. (A 7.50R16 tyre is just the radial-construction equivalent of a 7.50 x 16.)
Newer tyre dimensions are a mixture of metric and imperial quantities, e.g. 245/80 x 16, indicates a tyre carcass width of 245mm, an aspect ratio of 0.8 or 80% and a wheel rim diameter of 16"! A change became necessary when tyre technology enabled aspect ratios of less than 1.0. Low aspect ratio tyres give better on-road handling, all other things being equal, but there is still a place for the trusty 7.50 x 16 on 4WDs.
Can you still buy 7.50 16 SAT tyres???
Re: Can you still buy 7.50 16 SAT tyres???
Last edited by juz on Sun Aug 15, 2010 10:56 pm, edited 1 time in total.
Re: Can you still buy 7.50 16 SAT tyres???
juz wrote:Id say a 7.50 16 would be more the same as a 205R16
The 205R16 is a pretty small tyre, measure about 29 inches whereas the 7.50 x 16 SAT is about 32 inch high, as someone mentioned, basically a 235/85R16
The 8.25 was the big one!!
SWB V6 Paj with one or two mods 

Re: Can you still buy 7.50 16 SAT tyres???
mmm agreed cheers,edited that.