on 4/19/10 9:12 AM, Mike at [email protected] wrote: > On Apr 18, 10:53 pm, Earl Grey <[email protected]> wrote: >> I do ride my JB greens off-road, though they are less fun than my 42mm >> IRC Mythos XC Slicks. Have gotten one pinch flat on a high speed >> descend on a gravel road with sharp fist-sized rocks, running around >> 35-40 psi with a bike+rider weight of 210 lbs. >> >> Gernot > > I think there are plenty of riders who can get by riding JB greens off > road. Mark at Rivendell does and I think Cyclofiend has too. I weigh > 190 and am magnetically drawn to every rut, rock, root and bad line > when pedaling off road so it's just not a good idea for me. Then > again, I've ridden 28s off road at times. It's really nice to have a > bike the Hilsen or SH that provides lots of options.
JB Greens are my choice. But, I have gotten pretty quick at on-the-trail tube replacements over the years. ;^) Most of the local trails have some pretty sharp, rocky bits, which means adding a bit more pressure. I think you'll find a lot of pinch flats at that psi, if those are your conditions. On certain trails, I increase pressure significantly. It's always a balance of comfort, control, pressure and technique. That's the challenge I enjoy, and it doesn't always make for easy-breezy descending. If you want lower pressures, increase the tire volume. JB's are nice and fat and round, which give significant control, but things can get dicey when when things are jagged. Of course, if you increase size even a little bit, it feels like a monster truck. - J -- Jim Edgar [email protected] Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com Current Classics - Cross Bikes Singlespeed - Working Bikes Your Photos are needed! - http://www.cyclofiend.com/guidelines "I thought the idea was to waste the rest of our lives together.." -- Cyril, "Breaking Away" -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
