There's definitely a way to make the seat tube angle 71.5 on all the bikes, and since Grant likes a seat tube angle of 71.5, and he's the designer, that's what the bikes have. But notice, if you make the seat tube angle more relaxed on a smaller bike, that necessarily moves the saddle backwards and makes the top tube longer. And that's why Grant's small bikes have longer top tubes: precisely because of the slacker seat tube.
On Thu, Jan 30, 2014 at 1:57 PM, Elisabeth Sherwood <elisabeth.sherw...@gmail.com> wrote: > Re. the Soma San Marcos, I think the geometry figures with respect to the > seat-tube angle are incorrect -- there's just no way that every size frame > has a seat-tube angle of 71.5! And I've NEVER seen a small road bike where > that's even possible. > > -- Liz > > > On Thursday, January 30, 2014 4:51:58 PM UTC-5, art wrote: >> >> Thanks Anne, et al, for starting this thread. My 'life partner' (about >> 5'2") has had a 51cm/26" wheel Rambouillet for a decade, which she loves. I >> finally got it set up right for her (a few years back) with short reach >> drops and a *5* cm stem -- no way to make the top tube shorter! I've been >> looking for a rain bike frame for her for awhile....and was mostly looking >> for older Schwinns and Treks with nice tubing. But I hadn't considered the >> Soma San Marcos: very interesting, particularly the very slack seat angle! >> (I'm using a high-setback seatpost on my partner's bike, rather than the >> nice Nitto it came with) >> >> Does anyone know if one can fit 38mm tires (would like to use the Soma >> B-lines) on that bike *with* fenders? That's the design goal of the bike I >> want to build for her... >> >> By the way: true that the Pacers come small, but look at that seat angle! >> (75.5) That's going to make the top tube *very* long, once you get the bike >> set up comfortably! (notice that the reach is almost the same on the 42cm >> frame as on the 54cm.. only .4 inches=1cm difference) >> >> If these frames can take 38s plus fenders, I'm going to start selling old >> frames to finance one... >> >> Art >> Tacoma > > -- > 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. -- -- Anne Paulson It isn't a contest. Enjoy the ride. -- 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.
