get the java pack from dl section then take the file tyre.java(*\parts\scripts\rgearpart\reciprocatingrgearpart\SRC\) and look for the string "public void SetupRubber( int RT )", below it you will find the following:
if (RT == tcSPORT) // sport tyre //
{
rubber_rigidity = 0.900;
load_mul = 0.800*load_mul2;
min_rollres = 0.005*roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.740*slic_mul; // tyre: slip ratio (sliction*friction = slipfriction)
frictn_x = 1.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.300;
compound_label = " medium compound sport tyre";
police_check_fine_value = 0.0;
} else
if (RT == tcSUPERSPORT) // supersport tyre //
{
rubber_rigidity = 0.750;
load_mul = 0.800*load_mul2;
min_rollres = 0.004*roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.760*slic_mul; // tyre: slip ratio (sliction*friction = slipfriction)
frictn_x = 1.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.250;
compound_label = " soft compound racing tyre";
police_check_fine_value = 50.0;
} else
if (RT == tcDRAGRADIAL) // drag-radial //
{
rubber_rigidity = 0.550;
load_mul = 1.800*load_mul2;
min_rollres = 0.002*roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.720*slic_mul; // tyre: slip ratio (sliction*friction = slipfriction)
frictn_x = 1.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.750;
compound_label = " drag radial";
police_check_fine_value = 50.0;
}
else
if (RT == tcSTREET) // street tyre //
{
rubber_rigidity = 1.000;
load_mul = 0.750*load_mul2;
min_rollres = 0.0055*roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.695*slic_mul; // tyre: slip ratio (sliction*friction = slipfriction)
frictn_x = 1.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.500;
compound_label = " hard compound street tyre";
police_check_fine_value = 0.0;
}
else
{
rubber_rigidity = 1.000;
load_mul = 0.750*load_mul2;
min_rollres = 0.0055*roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.695*slic_mul; // tyre: slip ratio (sliction*friction = slipfriction)
frictn_x = 1.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.500;
compound_label = " tyre";
police_check_fine_value = 0.0;
}
friction = (1.3+(friction-1.0)/0.8*0.4)*1.15;
value /= rubber_rigidity;
brand_new_prestige_value = 25.0/rubber_rigidity + tyre_width/10.0-20.0;
name = name_prefix + " " + tyre_size_label+compound_label;
}
so edit your actual tyre java(which means the java of the ingame tyre and not the extend java as this above) on the rows 34 and 53 to correspond to the Tyre type on the tyre.java