I’ve been thinking about tire pressure recently, as I recently rode with a friend who insists on pumping his 38s to50 psi or more, while I pump my 28 mm (actual) Elk Passes to 55F/60 rear, my 32 mm Stampede Passes to 50/55, my 41 mm Naches Passes to 35/40, and my 54 mm Thunderburts at about 18 psi. I’ve been finding that the SPs might do better at 45/50 and the NPs at 30/35. I’m a bit more than 160 and the bikes with usual luggage weigh (guessing; first number ready to ride but no luggage, second is guestimate with usual luggage (Gofast: 18/19; Roadeo: 20.8/21.8; Errand with NPs 26/30; road bike for dirt 30.5/33.)
So it was fun to enter the numbers into the RH pressure calculator and find the following; the second set is my actual range. Rider + clothes, let’s ballpark at 165. RH Historical Actual EPs: 60-75 / 55-60 SPs: 49-60/ 50-55 NPs: 35-43/ 30-40 (I often carry heavy loads on this bike, mostly on rear but sometimes adding weight in front). TBs: 27-33 / 17-20. Other pressures: 72 mm WTB Rangers: 13-15 psi; 22 mm Spec 26x1 Turbos, 22 mm Conti GPs, 22 mm Mich Pro Race: 80-90. I’ve been using these pressures for years on surfaces ranging from dinner-plate smooth to rough gravel and, on pavement, often over 8” or wider pavement expansion cracks. I *never, never, never, never* pinch flat; the only time I’ve pinch flatted in the last 40 years was when I deliberately ran a 22 mm actual Specialized 26 X 1 Turbo (200 grams) at 80 psi in front into a pile of large gravel to see what would happen. Yes, I got a pinch flat. I’m curious to hear from others what I’m doing wrong. https://www.renehersecycles.com/tire-pressure-calculator/ -- Patrick Moore Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum ------------------------------------------------------------------------------------------------------- Executive resumes, LinkedIn profiles, bios, letters, and other writing services ------------------------------------------------------------------------------------------------------- *When thou didst not, savage, k**now thine own meaning,* *But wouldst gabble like a** thing most brutish,* *I endowed thy purposes w**ith words that made them known.* -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/CALuTfgsXeGfGUqPKkc%2BW7gt6kuGBVJ0VNLx2TgAr3xZAfmzk4Q%40mail.gmail.com.
