Shorts with minimal chamois

Average sit bones width. 

Average sit bones width.  Flexible. But too tight in the nether regions.

Your sit bones are ‘missing’ the flat part… erm that’s not clear, however it says to me that your saddle isn’t in the right position or your fit is wrong. You should be comfortable sitting/riding on the wide part of your saddle, as it’s difficult to see where you are sat, then on a normal saddle you should expect to see about an inch and a half of the nose of the saddle protruding.  

There’s more to this however, consider your shorts.. some shorts are more ‘pro’ fitting which often means that they have the pad further forward (Rapha Pro bib shorts), where other shorts are more ‘normal riding’ fitting with the pad further back (Rapha Classic bib shorts).  I have very flexible hips, so the pads more forward suit me far better than a pad further back.. it just means that if I put a pair of shorts on which are ‘normal’ I’ll position them further forward than they might usually sit.

Get some chamois cream to stop the ‘chaffing’. I forgot to put some on and chaffed my willy the other month on a long ride..  not nice.

Sounds like the saddle might

Sounds like the saddle might not be the right for you, but if you actually want bibs with less chamois, tri bibs are the way to go as another commented. My personal preference is castelli in tri bibs, but if you want to go thin, then I can recommend newline, since I have a pair of tri bibs from them with extremely thin chamois.

With saddle pressure, a lot

With saddle pressure, a lot depends on how you sit on the saddle. I’ve always sat a long way back on the saddle, and found the old flite shape by some way the most comfortable. I also have a long and low position so there’s a lot more weight on my arms. If you’re sitting forward on the saddle then you may be further onto the nose which would mean you’re putting your weight onto the narrower part of the saddle, and if your bars are high then there’s a bigger proportion of your weight on your backside.

These variables mean that saddles are incredibly personal, regardless of what sit bone measurements you might have, so all you can do is try different types.

Tri suits or triathlon

Tri suits or triathlon-specific shorts usually have thinner pads – they dry faster from the swim and don’t chafe on the run, so you could look around triathlon manufacturers and suppliers. 

Sounds like you need a cut

Sounds like you need a cut out saddle or noseless saddle like Adamo.  Shorts only allow long sessions in the saddle.  A comfy saddle is first then padding