My 2018 Greyhawk 31fs is adjusted to 4 inches per Helwig factory specs for towing 5,000 lbs. I called the factory in October 2018 and was given this measurement by the Service Mgr. and he sent me the installation instructions that confirmed what he said. We have over 20,000 miles which includes 2 trips to Canada from Florida plus many trips to Tennessee and Kentucky towing 5,000 lbs on my car hauler trailer with NO troubles from the Helwig springs…..
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