I weigh 400 lbs and tend to run the fattest tires my bike will fit (40mm Duremes right now) and I generally just run them 10psi less than the stated max and they are fine. I've run them in the 60psi range with no problem but probably wouldn't go any lower than that. This is primarily riding on smooth surfaces.
I also have a set of 32mm tires and I usually run them at max pressure. I'm not real conscientous about checking tire pressure and only air them up when they are noticeably low and I've never had a pinch flat. There probably aren't a lot of riders out there heavier than me so I would just run them where they are comfortable. I can't imagine tires that are dangerously low even being pleasurable to ride. On Saturday, January 19, 2013 3:23:18 PM UTC-6, René wrote: > > Since I'm a heavy guy, the spreadsheet that has been posted for all to > determine the optimal tire pressure has been very usefull for me, > particularly as all my bikes have different tire widths/sizes. However, > last week I ran into a couple of issues with this chart that I'd like to > see how everyone else has addressed: > > 1) Does tire size (650b, 700c, etc.) affect the optimal pressure for a > give tire width? > 2) If you are a very light person, for wider tires you get some ridiculous > low number, like 7lbs. How do you determine the lowest pressure to use in > these cases? > 3) Can I extrapolate these values to tubeless MTB tires as well? > > Any extra feedback is welcome! > > René > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
