Rear coil springs variable rate
 

Does anyone know if they make a variable rate rear coil spring for an 02 Civic LX.Quite often I'm on the road with 4 people in the car 60/90 minutes and I believe with the standard rear spring the rear tires angle out a bit and I'm thinking it will wear the tires funny.Or any other suggestions are welcome.The suspension is all stock cept for some strut bars F & R.Top and bottom on the rear, with a 1.0 or 1.25" ( sway bar I think).