Originally Posted by
rekmeyata
You can laugh all you want but your riding on marginal safety. Here, take a look at this calculator and use the middle one, and let me know using a 23 tire if you can put enough pressure in one, especially the rear, for your weight PLUS the bike's PLUS all the clothes you wear PLUS accessories on the bike, and still maintain the optimum 15% drop. Obviously you can do whatever you want, I'm just saying I wouldn't do it nor would I ever recommend someone to do it.
You didn't provide a link. I think
this is the one you are talking about, however. I find it totally wrong. I have bikes that have tires across nearly his entire spectrum. For my weight, the suggestion for a 23mm tire is to run the front tire at 104 psi on the front and 160 psi on the rear. The 104psi for the front I can agree with but I would...and have... run a similar pressure on the rear without issue.
On the other hand, it suggest that I use a pressure of 58psi on the front and 88psi on the rear for a 32mm tire. If I were to run that kind of pressure on even a unloaded road bike, I'd suffer pinch flats constantly if not rim damage and the front tire would be mushy. If I add a touring load, it suggest that I use 70 psi in the front and 106psi in the rear. With that wide of a tire, the rear one is dancing on the edge of constant blowout and the front one would still be mushy.
Putting in my wife's weight gives a 27psi front/41psi rear for a 32mm tire. I consider that kind of pressure to be a flat tire. I think most people would look at the pressure recommendations...and they are really only recommendations...as completely inappropriate.