I can tell you how to easily determine the correct over/under conversion kit for your 2017 K-Z Sportsmen Classic 180THT, though we would not be able to verify a specific fit for any trailer. It's easy to determine the correct over/under lift kit though because all you have to do is measure the diameter of your trailer's axle.
- 2-3/8" Round Axle: Dexter Trailer Springs Over-Under Conversion Kit # K71-384-00
- 3" Round Axle: Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00
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