There is oil in both fork tubes for compression damping... 235 lbs with gear at minimum preloads? That's impossible without bottoming out severely. What's your sag? Your suspensions are probably in a more compressed position causing a harsher ride. What are your rebound damping settings at?
Like I mentioned, at 190 lbs with no gear with stock fork oil, I needed to have forks at maximum preload with 3/4 turn out on rebound damping to prevent bottoming out when riding on our rough roads. That and rear at #3 preload with rebound damping at 12 clicks out gives me good compliancy without bottoming out too hard on the harshest bumps.
I'll do some measurements on the weekend.
The only time it bottoms is driveways at speed whilt turnign. Feels like rim strike. Harsh, real harsh.
If it is bottoming otherwise - it's very gentle. The zip tie shows near bottoming under brakes when hitting roadworks.
More preload makes the ride worse, not better, and I've tried the full range of adjustment. Small bumps feel the same as jarge bumps in terms of harshness - it's not bottoming there either.
I run both preloads at minimum.
Front and rear rebound about 1/3. Less damping than that gives a harsher ride - presumably from the bike bouncing back.
Had 20KG of campign gear on the back on the weekend. Didn't touch preload. Had to add 2 clicks of rebound to manage the extra travel generated.
Front is the worst - makes my wrists sore.