David, thank you for answering this debate about 15" and 16" wheels on the Fs and TFs. It is quite true that the larger wheels give a firmer ride because of the lower profile tyres, but sharpens the handling, whereas the 15" have a higher sidewall and can be more "wallow'y"
Having said this one Epsom member went from the Contenentials that were worn out at 30,000 miles, to TOYO T1-Rs and said its like a new car with a softer quiter ride. the Contis were hard & noisy.
Kim went from a PirelliP6000/ Conti on 15" wheels (very unstable) to 16" with Falken ZE912 and said that it was a totally different car, firm and precise.
I think it would be good for Jon Norris to comment with his 17" wheels and 30 profile rubber bands.