Tyre width and Friction?

[Kartracer]

Every racing series I know has same compound front and rear tyres which makes it redundant having wider tyres. I still reckon it's due to equalising the available traction from each end of rear weight biased cars.

Certainly, the difference in width between fron and rears should ideally reflect the difference in load, so that with an identical compound you have the same temperature and roughly the same wear. Going wider on all four wheels will allow you to go softer if you are already marginal, or if you are overcooking one end of the car, going wider at that end will help you to rectify that problem, and thus gain grip.

[Lukin]

Certainly, the difference in width between fron and rears should ideally reflect the difference in load, so that with an identical compound you have the same temperature and roughly the same wear. Going wider on all four wheels will allow you to go softer if you are already marginal, or if you are overcooking one end of the car, going wider at that end will help you to rectify that problem, and thus gain grip.

Yep!

If you have a 45:55 front to rear weight distribution to get equal traction at the front and rear you will need different amounts of traction (force) at the front as you need at the rear during steady state cornerin.

If you use the max tyre widths for this years tyre regulations, it gives a front:rear bias of 48:52. The minimum is 44.5:55.5 and the maximum is 49.3:50.7