here is a list @MudHappy feel free to compare/use/adjust to fit your mods needs
Note that:
All of my mods use real life weights
All of my wheels are 100 mass tires
and my center of mass wont go lower -0.25 to -0.4 and is most of the time 0.05 to 0.1 forward in the X axis giving to the mod a bit more weight on the front tires depending on how far the rear axle is from the center (willis is the exception because it doesnt have that offset in the center of mass) and the m37 being the only one with -0.4 in Y axis
for a 1700kg truck (Blazers 75 to 85)
<Wheel>
<RearWheel
ConnectedToHandbrake="true"
HardpointOffsetY="-0.27"
SuspensionDamping="0.17"
SuspensionMin="-0.5"
SuspensionMax="0.4"
SuspensionStrength="0.009"
Torque="default"
Type="100 mas tire)"
ParentFrame="Chassis_cdt"
/>
<FrontWheel
HardpointOffsetY="-0.20"
SteeringAngle="40"
SteeringCastor="8"
SuspensionDamping="0.15"
SuspensionMin="-0.5"
SuspensionMax="0.4"
SuspensionStrength="0.0095"
Torque="full"
Type="(100 mass tire)"
ParentFrame="Chassis_cdt"
/>
</Wheel>
For a Small GPV swb(around 1200 kg)
<Wheel>
<RearWheel
ConnectedToHandbrake="true"
HardpointOffsetY="-0.22"
SuspensionMin="-0.4"
SuspensionStrength="0.008"
Torque="default"
Type="CJ-BFG-35-12-R15in"
ParentFrame="Chassis_cdt"
/>
<FrontWheel
HardpointOffsetY="-0.22"
SteeringAngle="40"
SteeringCastor="8"
SuspensionMin="-0.42"
SuspensionStrength="0.007"
Torque="full"
Type="CJ-BFG-35-12-R15in"
ParentFrame="Chassis_cdt"
/>
</Wheel>
and for big old mil 4x4 (taken from my M37) the mass of the wheels is 200 because is a 44 and this game seems to hate big,wide tires with small weights
<Wheel>
<RearWheel
ConnectedToHandbrake="true"
HardpointOffsetY="-0.22"
SuspensionDamping="0.08"
SuspensionMin="-0.47"
SuspensionMax="0.1"
SuspensionStrength="0.007"
Torque="default"
Type="M37_BFG_44_21_16in"
ParentFrame="Chassis_cdt"
/>
<FrontWheel
HardpointOffsetY="-0.18"
SteeringAngle="40"
SteeringCastor="8"
SuspensionDamping="0.08"
SuspensionMin="-0.48"
SuspensionMax="0.1"
SuspensionStrength="0.0065"
Torque="full"
Type="M37_BFG_44_21_16in"
ParentFrame="Chassis_cdt"
/>
</Wheel>
and for road cars with no lift (taken from my F100)
tire mas 100
<Wheel>
<RearWheel
ConnectedToHandbrake="true"
HardpointOffsetY="-0.15"
SuspensionDamping="0.17"
SuspensionMin="-0.4"
SuspensionStrength="0.008"
Torque="default"
Type="Gy_R_L_28_11_20in_L"
ParentFrame="Chassis_cdt"
/>
<FrontWheel
HardpointOffsetY="-0.2"
SteeringAngle="40"
SteeringCastor="8"
SteeringJointOffset="0.2"
SuspensionDamping="0.165"
SuspensionMin="-0.38"
SuspensionStrength="0.015"
Type="Gy_R_L_28_11_20in_L"
ParentFrame="Chassis_cdt"
/>
</Wheel>