Nice bike, btw. Patrick Moore, who talked at length this morning with the Western States Jamis rep (parked at Fat Tire Cycles) about the demise of 26" and the new so-called 27.5" Plus -- Jamis has a new model for a 3" 27.5 tire; too bad I don't have $2,700.
On Fri, Oct 9, 2015 at 7:28 PM, Patrick Moore <bertin...@gmail.com> wrote: > Regarding 19 mm rims (are you measuring inside to inside, or outside to > outside? 19 mm is *very* narrow; my Sun M14As and ME14As are 19 outside > to outside, but these are exceptionally narrow even for narrow rims. I use > 19 mm o-to-o rims for narrow (26") road tires. > > That said, the 559 M14As were made back in the '90s for mountain bike use, > and your typical Farmer John was about 50 mm wide, though with far, far FAR > stiffer sidewalls. I rode many miles with 1.95s on these rims, off road, > with no problems. > > I think you'll be fine as long as you keep the pressure high enough -- > IME, fat tires on narrow rims do fine, but are very sensitive to pressure; > you need to keep them inflated enough to avoid sidewall flop, especially in > cornering, and this is a fortiori true when the sidewalls are very thin, > supple, and flexible. > > OTOH, IME, very supple tires ride much more smoothly at higher pressures > than do stiffer tires at the same pressures. > > On Fri, Oct 9, 2015 at 7:21 PM, iamkeith <keithhar...@gmail.com> wrote: > >> DO THESE TIRES MAKE MY BIKE LOOK SKINNY? >> >> I finally got a chance to install and try the RTPs on my AR, during a >> nice, long, autumn day ride on some dirt forest service roads. I was >> hoping I wouldn't like them. I mean, we eventually have to reach a point >> of diminishing returns, when wider is no longer better, right? But, Jiminy >> Christmas - they're like riding on clouds! >> >> *Good news* is that the bike has tons of clearance to spare, with both >> the tires and fenders. And still no toe clip overlap! It's amazing that >> Rivendell had the foresight to anticipate something like this on a bike >> that was made in 1999. >> >> *Bad news* is that, to really use them to full advantage, I think >> you need to purpose-build a bike around them right from the beginning. As >> part of a retrofit, I'm afraid I might want to invest in smaller chainrings >> and wider fenders, but might NEED to invest in wider rims - none of which >> can I afford at the moment. Can these 519 (19mm) Mavic rims [see pic. >> below] possibly give enough support for a tire this wide? My gut says "no >> way," but I'd love it if someone could convince me otherwise. >> >> *Best case scenario*, I'm afraid that I can't run optimally-low >> pressures. (I had 25# and 30# today. Does that sound right for a 200# >> rider?) *Worse case scenario*, I'm terrified that I'm going to roll a >> tire on a turn, and crash. ( I went down hard recently, on one of >> my narrow-rimmed 90's mountain bikes, because I had under-inflated >> after exclusively using, and becoming used to, the lower pressures of 3" >> and wider tires over the past few years. But that was at a much slower >> speed than this thing will go.) >> >> So I took it easy on turns today. On straight sections though, I rode >> at speeds I never would have thought prudent before. It swallowed up >> jagged rocks, packed gravel, loose gravel, and everything else. The >> "loose" gravel, in particular, really surprised me, as my previous >> experience with "slick" tires had taught me that they were completely >> dangerous for such conditions. On these, I just kept giggling and going >> faster. I don't know if it's a stickier compound, the extra width, or the >> ability to deform that made the difference. >> >> The other thing I kept thinking about the whole time was the unfair >> advantage that some super-fit Ravn riders are going to have, when they >> start showing up at gravel grinding "events." Most people will have never >> seen it coming, and the naysayers won't be laughing for much longer! >> Really fun tires! >> >> >> <https://lh3.googleusercontent.com/-BpndRx6y5Ck/VhhmRGgmVgI/AAAAAAAAAJQ/b5U-zdKphDo/s1600/AR_RTP.jpg> >> >> >> <https://lh3.googleusercontent.com/-hh4X_NBTk48/VhhmYFX9d0I/AAAAAAAAAJY/qx8GV6AHY0Y/s1600/519_RTP.jpg> >> >> >> -- >> 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. >> > > > > -- > Resumes, LinkedIn profiles, bios, and letters that get interviews. > By-the-hour resume and LinkedIn coaching. > Other professional writing services. > http://www.resumespecialties.com/ > www.linkedin.com/in/patrickmooreresumespec/ > Patrick Moore > Alburquerque, Nouvelle Mexique, Vereinigte Staaten > > ************************************* > *The point which is the pivot of the norm is the motionless center of a > circumference on the rim of which all conditions, distinctions, and > individualities revolve. *Chuang Tzu > > *Stat crux dum volvitur orbis.* Carthusian motto > > -- Resumes, LinkedIn profiles, bios, and letters that get interviews. By-the-hour resume and LinkedIn coaching. Other professional writing services. http://www.resumespecialties.com/ www.linkedin.com/in/patrickmooreresumespec/ Patrick Moore Alburquerque, Nouvelle Mexique, Vereinigte Staaten ************************************* *The point which is the pivot of the norm is the motionless center of a circumference on the rim of which all conditions, distinctions, and individualities revolve. *Chuang Tzu *Stat crux dum volvitur orbis.* Carthusian motto -- 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.
