diff --git a/mur_2019/data/tyres.ini b/mur_2019/data/tyres.ini
index 29cea81f80dac533292aaf30ee7da98b14e1d03c..719659bad05247c204e9dc0bb2d91671b47a4a63 100644
--- a/mur_2019/data/tyres.ini
+++ b/mur_2019/data/tyres.ini
@@ -36,11 +36,11 @@ PRESSURE_FLEX_GAIN=0.6 ; INCREASE IN FLEX per psi
 PRESSURE_RR_GAIN=1 ; INCREASE IN RR RESISTENCE per psi
 PRESSURE_D_GAIN=0.008	;loss of tyre footprint with pressure rise.
 PRESSURE_IDEAL=25			;Ideal pressure for grip
-FZ0=1915
+FZ0=1500
 LS_EXPY=0.49
 LS_EXPX=0.49
-DX_REF=1.80			
-DY_REF=1.80
+DX_REF=1.1867			
+DY_REF=1.9520
 FLEX_GAIN=0.191
 FALLOFF_LEVEL=0.92
 FALLOFF_SPEED=4
@@ -76,11 +76,11 @@ PRESSURE_FLEX_GAIN=0.6 ; INCREASE IN FLEX per psi
 PRESSURE_RR_GAIN=1 ; INCREASE IN RR RESISTENCE per psi
 PRESSURE_D_GAIN=0.008	;loss of tyre footprint with pressure rise.
 PRESSURE_IDEAL=25			;Ideal pressure for grip
-FZ0=2142
+FZ0=1500
 LS_EXPY=0.60
 LS_EXPX=0.60
-DX_REF=1.80	
-DY_REF=1.80
+DX_REF=1.1867
+DY_REF=1.9520
 FLEX_GAIN=0.189
 FALLOFF_LEVEL=0.92
 FALLOFF_SPEED=4