I'm a little confused. The top tube is too long, but the bike is too small? A bigger bike will increase the top tube length. Few bikes are more comfortable with the saddle slid forward, which is often counterintuitive. If I'm looking at the correct photos, it doesn't appear that your stem is as tall or as short extension as it might be. Slide the saddle back and get a technomic 50 mm. See Grant's book for the explanation of CPT.
Of course, if you also want fatter tires, then you may be out of luck. I have a friend who owns a beautiful but unorthodox fat-tire 650B custom that he's ridden very little and tried to sell a couple times for reasons that have nothing to do with the bike. It's a 60 cm with a short top tube. Sounds perfect for your needs. I'd be happy to put you in touch with him - let me know off list. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/4utAP9VutRwJ. 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.
