the a23 extrusion has been out there for a long time in 700. anthony at longleaf bicycles in new england was the first to pony up the money for a run of 650b a23 rims. they work great, and like all tubeless ready rims, tires fit great on them.
the 'new' part with boulder is they are now offering the a23 off-center in 650b, in addition to the regular extrusion for fronts. they also had them polished. its a very good rim. i ran the symmetric ones from longleaf the possible negatives of the a23 extrusion in my mind are: 1. the brake track is not very tall, not as tall as the p23 or 2. the brake track sidewalls are not parallel. they have a slight v shape, ideal for centerpulls and caliper brakes, sub optimal for cantilevers, 3. a modernish look, not as classic as a boxier section -- 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/groups/opt_out.
