Hi,

Can anyone confirm the size of adapters that I would need to install Cetus wheels ( 6.5 - 15 -43 ) on my 88 240. I seem to recall someone telling me 25mm, but my memory sometimes fails me. Never having used adapters, is there any reason not to use them other than the expense ? The wheels were gifted from an 850 going to scrap and the car in question needs 4 new tires.

On a related matter, I've been running 195-60-15's on the front of my 90 240 wagon. Inner and outer tie rods, as well as ball joints were replaced 2 years ago followed by an alignment. It steers beautifully, except that at minimum turning radius it skips a bit. I replaced the tires with a newish set of 185-65-15's, narrower and a bit higher sidewall, and the skip went away. It also seemed a bit better ride, and I'm wondering if the symptoms were due to old tires, or does the 240 just like to have a little more air under it. If so, should I consider 195-65's over 195-60's on the Cetus wheels ?

any advice is appreciated
Pete

Hey Pete. I don't know 240s, but maybe I can get you started with the math. You'll need to know the width and offset of the 15's already on the car. Start by subtracting the offset of the present wheels from the offset of the Cetus. Then add in half of the width difference, if there is any.

For example, suppose your present wheels are 6" wide with a 25mm offset. In this scenario, the resultant number is 18. That would be the width of spacer needed to keep the center of the new rim exactly where it is. So if you use a 20mm spacer, the centerline moves outboard by 2mm. Then subtract the widths, which would be 1/2" or 12.7mm--let's round up to 13. So the edge of the rim will end up 15mm closer to the fender lip (13 + 2). The inside of the rim will be 11mm closer to the inner wheel well or strut. Then there is the matter of tire selection, which won't matter if you stick with the same size.

--Wilson