Cab I just got rid of a set of K-motion K950s . 1.550 diam. 2" installed height. 245 lbs. seat. 690lbs. at 1.3. At 1.250 I was well over 700 lbs on my tester at .730. Coil bind 1.150. They are a H11 tool steel spring. I ran a set of plus .050 locks put me at 2".