I've never used any pressure calculator, but for follies I looked at a few. The Silca is by far the most detailed as it accounts for many vaiables. https://silca.cc/pages/sppc-form
For my 33mm 700c tires with a combined weight of say 195 pounds, the Silca calculator comes the closest to what I ride for any condition, no more than 39 front, 42 rear at the time of pumping. Albeit, I had chose category 4 "extreme" gravel to get it that low. Otherwise for nice smooth roads it suggests like any other calculator @58/61. That'd feel rock hard, and I can't think of any place that has nice smooth tarmac for very long. 700x47mm(actual) Big Ben's on the Bombadil I keep anywhere from 25-33 max and over rough terrain I could go lower. They only felt squirmy when I first tried them that way, but I don't notice that anymore. On Wednesday, August 31, 2022 at 11:39:05 AM UTC-4 rmro...@gmail.com wrote: > On my Clem with 48mm Gravelking SS tires set up tubeless, I leave the > house most days @ 35-37 psi f/r. I am 170-175lbs. and most rides are mixed > surface with some dirt and some fine gravel but mostly paved. I think this > pressure is just about right? I was on a sub24 and had a tire that was > loosing air. My Lezyne mini pump just was not cutting it. Another rider > pulled out his Topeak Road Morph pump with in line gauge - holy crap! I > think I ordered mine that evening & it is fantastic. I did not want it > hanging from the bike so it normally resides in my Fifth Season Squall > basket sack with other ride essentials. As for accuracy, the morph’s in > line gauge seems in sync with my Topeak mountain floor pump. > > Sent from my iPhone > > On Aug 31, 2022, at 9:03 AM, Alex K <ack...@gmail.com> wrote: > > FWIW, I am a hair under 200lbs, and I really dislike that squishy, low > psi feeling on the pavement. Looking at RH's tire pressure calculator now, > though, and the recommended PSI rangeis 27-34 from soft to firm. That is > surprising to me, and perhaps it's time to re-evaluate/try some new things! > > Alex > On Wednesday, August 31, 2022 at 5:58:22 AM UTC-7 wboe...@gmail.com wrote: > >> I am guilty of not having a great gauge on any of my pumps at home, so I >> find myself frequently dropping pressure over the course of a ride until I >> get to magic carpet feel. It's particularly disappointing when I get 45 >> miles into a 55 mile ride before I get there.... >> >> >> On Wednesday, August 31, 2022 at 7:46:35 AM UTC-4 brok...@gmail.com >> wrote: >> >>> I agree that 42 psi seems high for a 48mm endurance casing. If you're >>> running tubes you may be wary of punctures or pinches so you'd likely run >>> higher, but I think you can safely get away with lower pressures. I'm 175 >>> lbs and ride tubeless setups on most of my bikes. The bike I ride the most >>> is tubeless with 48mm RH Juniper Ridge endurance casings, and 30 psi is the >>> MOST pressure I put in them, and that's for rides that are mostly paved. If >>> I'm doing gravel or dirt trails, I'll drop the pressure down to 24 psi. I >>> don't really ever change pressures mid-ride, but often have to pump up a >>> bit if it's an overnight or multi-day trip. >>> >>> I'm one of those bag-obsessed riders you mentioned. I use the Lezyne >>> Micro Floor Drive HV pump and thread it onto a Topeak Shuttle digital gauge >>> as the "head" of the pump - I just attach it whenever I need to use the >>> pump. It's a pretty nice, compact system and I find it to be way more >>> accurate than my shop pump head (which is the Park INF-2 Shop inflator). >>> >>> On Wednesday, August 31, 2022 at 7:06:24 AM UTC-4 Garth wrote: >>> >>>> I don't know your weight is Alex but 42 PSI for any 48mm tire seems a >>>> bit high for *any *tire. I've let some air out of tires in rare >>>> circumstances but it's not something I want to do on a regular basis. If I >>>> do let air out I'll keep it there for the rest of the ride. In "someone >>>> else's shoes" though, I could do anything applicable to the circumstance. >>>> I've only used the Topeak Road and Mountain Morphs since 2000. They're >>>> rather large and bulky, but they function just like a mini floor pump, so >>>> you're pushing down against the ground, rather than across your other arm. >>>> Their frame mount is stupid though so you have to buy your own side mount >>>> with bottle cages. I may buy a Silca Tattico to try as I rarely use a pump >>>> on the road anyways. it's one of the few mini hose type pumps that have a >>>> lever-lock head, rather than a screwy screw-on. I have no idea how >>>> effective it is though using arm to arm resistance without trying it. >>>> Basically I haven't tried a bunch of pumps, let alone bags, so no not >>>> every >>>> Riv rider is so inclined to try every one out there. What you seen in >>>> print >>>> and other media offers a very limited view of what the real World actually >>>> is, in all It's glorious variety. >>>> >>>> >>>> -- > 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-bun...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rbw-owners-bunch/cf07df18-f436-47a7-bcfb-b97826f6ccb4n%40googlegroups.com > > <https://groups.google.com/d/msgid/rbw-owners-bunch/cf07df18-f436-47a7-bcfb-b97826f6ccb4n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/a31fba51-3bad-4448-9f8d-e6ee420cb80cn%40googlegroups.com.
