Very interesting -- it is a change from other advice I've heard. But you've got it exactly backward (and Schwalbe says the opposite: read more carefully) about lower pressure on a narrow rim: you need higher pressures on a narrower rim, all else equal.
I know that one big benefit of wide rims (as Schwalbe notes) is that they give a fat tire more stability so that you can run it at lower pressures: I run my 60 mm BAs as low as 12/16 on dirt on 45 mm rims with no adverse consequences (I'm 175). I've even run them this low on pavement: apart from a bit of bounce, no real problem. Flop in cornering is hugely reduced compared to the same tire and pressure on a 25 mm rim. Note though that a given pressure on a wider rim will feel "harder" than the same pressure on a narrower rim, doubtless due to that same, better sidewall support; this is my experience with the BAs and the 45 mm versus 25 mm rims. On Tue, Dec 13, 2011 at 8:44 PM, Thomas Carstens <tjaycarst...@gmail.com>wrote: > > > Thanks for the help! Since yesterday I've discovered an interesting > article on the Schwalbe tires web site. > http://www.schwalbetires.com/tech_info/tire_dimensions#rim > According to them, the European Tire and Rim Technical Organization > Standards have changed due to a lot of experience with MTBs using > narrow rim/wide tire combos with no negative consequences. They have > a chart which differs from others I've seen. Also, they seem to > suggest that, if anything, on a narrow rim wide tire setup the tire > pressure should possibly be reduced. > Tom > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > To unsubscribe from this group, send email to > rbw-owners-bunch+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rbw-owners-bunch?hl=en. > > -- Patrick Moore Albuquerque, NM For professional resumes, contact Patrick Moore, ACRW http://resumespecialties.com/index.html -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.