[Taxi645]

With the 2017 rules changes (which luckily have been turned back) we also went to much wider tyres. The 2017 care rule changes didn't have the desired effect (as expected). Unfortunately the wider tyres weren't cancelled along with it. In fact with the changes to the 18-inch wheels they have now also grown in diameter from 660mm to 720mm.

Why would narrower, lower diameter wheels and tyres be better:

Narrower:

- Less (unsprung) weight
- Less drag

- Less aero disturbance (also for the following car).
- Narrower car is more room for side to side action.
- Longer braking distances (so more room for overtaking on the brakes).
- More skill required on the throttle.
- Less corners become easily flat
- Better wet tyre performance.


Smaller diameter:

- Less (unsprung) weight
- Less drag
- Less aero disturbance (also for the following car).
- Better cockpit visibility

Why not use the change to the lower side wall to go back to a narrower 16-inch wheel/ 670mm tyre combo which would be much more inline with goals of the 2022 aero changes, would reduce the weight and the size of the cars again and all the other benefits of the narrower rubber (including being more suitable for very wet weather)?

It may not look like a 80's bedroom poster tyre, but otherwise be a much better choice. Missed opportunity in my book.