Rich S recently had a post on Minimum Tire Pressure: "For those of you who ride 700 x 32-35 size tires (with tubes) on roads, what is the minimum tire pressure you're comfortable using?"
4 responses were for 700x32 and contained the rider weight. I compared the reported pressures to the pressures using the 15% tire drop method, using the stated weight as rider weight and added 30# for bike weight & used a 45%/55% weight distribution. The difference is expressed as a % of the 15% Tire Drop Pressure, (Pact - P15)/P15. see table below, a NEGATIVE % indates the rider is using LESS pressure than the 15% tire drop method *Wrider* *Fact* *Ract* *Fpred* *Rpred* *%F* *%R* 235 60 65 69 85 -13 -24 200 60 70 60 74 0 -5 150 35 40 46 57 -24 -30 140 40 60 44 54 -9 11 Most everyone is using LESS pressure than the 15% method, but staying above 25% less pressure. I did a survey about 2 years ago, and pinch flats occurred when the actual pressure was > 25% below the 15% tire drop pressure. So it looks like 4 folks are trying to get a more comfortable ride but avoiding pinch flats John Hawrylak Woodstown NJ -- 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 https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
