Cant change Tires/Aero to 29/600-900, only 2.9. Help me? Why?

Im using currently the ONR shared one for the Prague lap, and currently sitting at top50 but I know I could do better with better tuning.

I searched and found out that Bryce shared this info for Prague, but I CANT get the tires to 29? It goes as far as 3.0

How can I make it happen? Any help would be really REALLY appreciated.

Tires
29.0
28.5

Gearing
Final Drive: 3.79
1st: 4.74
2nd: 3.92
3rd: 3.18
4th: 2.42
5th: 2.00
6th: 1.79
7th: 1.70

Alignment
Camber
Front: -3.0
Rear: -3.0

Toe
Front: 0.2
Rear: 0.0

Caster: 2.0

Anti-Roll Bars
Front: 6.70
Rear: 39.60

Springs
Front: 200.8
Rear: 1.86.7

Ride Height
Front: 2.8
Rear: 3.1

Damping
Rebound
Front: 2.0
Rear: 2.0

Bump
Front: 13.0
Rear: 13.0

Aero
Front: 689
Rear: 992

Brake
Braking Force
Balance: 55%
Pressure: 160%

Differential
Acceleration: 100%
Deceleration: 0%

If your tires can t go higher than 3, that s because your game is set in metric unit. The open source is for the imperial system. In your profile option you can switch from metric to imperial.

Cheers