Pontoon234

I recently put the Rancho 9000's in the rear and Quik Lifts in the front. I towed the boat to the keys last week and noticed a sag. Do I need to get bigger springs in the rear. Once I unhitch, she's perfectly level. I'm towing a 20' pontoon on a double axle. Thanks

Tradesman

Anytime you haul something there will be some sag, same as when you have a heavy load in the bed. My recommendation is either upgrading to heavy duty leaf springs or airbag rear suspension.