Well I have fit the "new" wheels and here is the result. Old Style 61 New Style 176
There is 2/3rd of SFA space between the top of the front tire and the base of the front suspension bracket, well about 1 - 2 cm, and there was a funny sound from the rear when I first started driving
, but when I checked the pressure in these tires they were down to around 20psi, bumped them back to 35psi and all is as I expected.
The funny thing is my wife was out today when I did the change over, and she hasn't noticed any changes,
even though we went out to basketball in my car.
So now we are running 245x45x19 (9" rim) & 275x40x19 (10" rim), and I am not happy with the little amount of tire overhang to protect the rims from any gutter contact. Anyway it is what it is until the next set of rubber is due. It will be interesting to see how these tires improve the off the mark traction loss issues experienced with the 235x60x16" tires.
Melbourne has these funny Freeway access ramp traffic lights which restrict two lanes of traffic to one car per lane per light change, with a variable delay between each light change, so it's basically two lanes into one after 60-80m, with both drivers wanting to be in front. So each day on my way home, there is a situation where there is a state sponsored drag. I have been caught out a couple of time trying to put too much power down off the mark, the traction control kicks in and I very quickly fall behind.