DS, I have used 32 mm GB Cypres and ~41 mm Soma GR tires on my 650B AHH. I will disent from the likely majority opinion and suggest you go with the 38 mm tires. I found the 32 mm tires to be excellent for all the roads around me, and I also rode them on local trails and fire roads with no problems. So I am inclined to think 32 mm is wide enough. That said they did look a bit lost in all that clearance, whereas the larger tires fill up the space nicely, and there is no significant down side to going a bit wider. I suggest the 38s over the 42s because they will pass the brakes inflated more easily than the 42s (assuming your Sam doesn't have cantilever brakes). Also if you want fenders come next fall, clearance and coverage will be easier with the 38s. When I changed from 32 to 40+ tires I noticed differences but they were modest enough that I doubt I would notice much difference between 38 and 42. I suspect that 38 is the goldilocks size for bikes like ours, particularly for virtually all paved road use.
If you are in the SF Bay area and we can work out the transfer, you can try out my Cypres tires if you like. One has a small casing cut that should probably be booted but otherwise they are fine. On Wednesday, April 29, 2015 at 9:11:45 AM UTC-7, DS wrote: > > I need the collective wisdom and varied opinions of this group to help me > decide, or further confuse me, on the 38mm or 42mm Compass tire for my > lightweight wheelset build for my 650b Sam. My other wheelset has Soma > Cazaderos. Should I go as wide as I can fit wit the 42mm Babyshoes (are > there wider that can fit the sam)? Or stay a little narrower with the 38M > Loup Loups? Or even more narrower with they 32m Cypres? This will be used > 97% of the time on decent to well paved roads. > > Also, if anyone has a lightly used set of any of these for sale let me > know ;) > -- 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.
