40 mm drop . 16s or 17s .what is best cheers

[Len]

Total rubbish as usual! Wheel size has no effect on tyres rubbing!
The tyre size does.
If you fit the correct combination of wheel and tyre you keep the same rolling radius so a 16 and 17 inch wheel is the same diameter.

As for the OP's question its really down to personal taste.
If you want the wheel to stand out then go for 17's
Also a consideration is comfort, as with 16's you need a higher profile tyre so there is a bit more suppleness and not so much of a rock hard ride.

[Wayne]

Total rubbish as usual! Wheel size has no effect on tyres rubbing!
The tyre size does.
If you fit the correct combination of wheel and tyre you keep the same rolling radius so a 16 and 17 inch wheel is the same diameter.

Well a 16" with a 195/45 is going to give you more room than a 17" with a 205/40.

It did on mine thats for sure even with the same offset.

Just for info: 205/40-17 is showing as a 2.4 % difference on the tyre size chart so is slighty bigger overall