well, according to Spoon, the ITR's (Japanese model) spring rates are as follows: Front - 4.4 , Rear - 2.5~4.4 . Looks to me that Spoon cant make their mind up about the rear rate, unless it's some kind of progressive thing. Also, the CTR's spring rates are as follows: Front - 4.3 , Rear - 4.2 . Not sure about the ride height though.