We run 315's and RS9000's and drop pressure down to about 35-38lbs. I find the front to do 'ok' with the stock SMB springs... it's the rear that i can't stand. Our ass-end bounces around like an old cadillac.. with all the weight back there. The stock ford springs are way too overloaded..especially having a EB.. and deavers/alcans would help. The shocks probably need replacing/upgrading (size) too. I need to address this, but right now is the wrong time financially.
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Dave and Yoshi [Ki6LBB] https://www.adventureduo.com
2003 Baja Tan SMB EB50 V10 (SOLD in 2008)
2003 Baja Tan SMB EB DYO 7.3 Diesel
Yeah, I was surprised how poor the ride was compared to other non-SMB vehicles especially rigs with IFS. My van shutters so bad that I usually have to slow to20 MPH on bad washboard. It might vary with the weight of your vehicle. I’m running 285’s at 80 PSI on an 11K + van. I have air bags and must lower them to 5 or 10 lbs. Dropping the tire pressure to 35-40 lbs makes a big difference but I keep my speed to 30MPH or lower. Spring upgrades are on my list both front and rear.
DaveB
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer
Sportsmobile (AKA Money Pit)
Linear Mode
